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  • Polymer and Materials Science  (718)
  • Fluid Mechanics and Thermodynamics  (15)
  • AIRCRAFT  (10)
  • LUNAR AND PLANETARY EXPLORATION
  • 1955-1959  (671)
  • 1945-1949  (72)
  • 1957  (671)
  • 1946  (72)
Collection
Keywords
Publisher
Years
  • 1955-1959  (671)
  • 1945-1949  (72)
Year
  • 1
    Publication Date: 2019-05-11
    Description: Investigation of air-cooled, plug-type, variable- area exhaust nozzle at high temperature
    Keywords: AIRCRAFT
    Type: NACA-RM-E57A07
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  • 2
    Publication Date: 2019-05-11
    Description: Heat transfer in regions of separated and reattached flows
    Keywords: AIRCRAFT
    Type: NACA-RM-L57D25B
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  • 3
    Publication Date: 2019-05-11
    Description: Hub-tip radius ratio transonic turbine for secondary flow - turbine with low-velocity turning stator and standard rotor
    Keywords: AIRCRAFT
    Type: NACA-RM-E57E09
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  • 4
    Publication Date: 2019-05-11
    Description: Hub-tip radius ratio transonic turbine for secondary flow - stator configurations designed to eliminate blade wakes and secondary-flow effects
    Keywords: AIRCRAFT
    Type: NACA-RM-E57G08
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  • 5
    Publication Date: 2019-05-11
    Description: Boundary layer characteristics of fuselages of various cross sectional shapes at static pressure
    Keywords: AIRCRAFT
    Type: NACA-RM-L56I13
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  • 6
    Publication Date: 2019-05-11
    Description: Performance of supersonic ramp-type side inlet with ram-scoop throat bleed and varying fuselage boundary layer removal at low supersonic speeds
    Keywords: AIRCRAFT
    Type: NACA-RM-E56I26
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  • 7
    Publication Date: 2019-05-11
    Description: Modification of twin side-inlet induction system and in-flight gains
    Keywords: AIRCRAFT
    Type: NACA-RM-H57J09
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  • 8
    Publication Date: 2019-06-28
    Description: Some results of recent experimental investigations at supersonic and transonic speeds are presented to show the present status in the estimation of load distributions on controls and adjacent wing surfaces resulting from the deflection of flap controls and spoiler controls. The results indicate that the development of methods for predicting loads associated with controls has not kept pace with the acquisition of experimental data. At low supersonic speeds sweeping the hinge line induces strong three-dimensional-flow characteristics which cannot be treated by the simplified methods previously developed for controls without sweep. At transonic speeds the estimation of loads associated with controls must usually be dependent upon experimental information inasmuch as the latest attempts to predict chordwise and spanwise loadings have met with only limited success.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-RM-L57D26a
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  • 9
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    In:  CASI
    Publication Date: 2019-05-10
    Keywords: AIRCRAFT
    Type: NACA-RM-SL57J15A
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  • 10
    Publication Date: 2019-05-10
    Keywords: AIRCRAFT
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  • 11
    Publication Date: 2019-05-30
    Description: Boundary-layer-transition and heat-transfer measurements were obtained from flight tests of blunt and sharp cones having apex angles of 50 deg. The test Mach number range was from 1.7 to 4.7, corresponding to free-stream Reynolds numbers, based on cone base diameter, of 18. 3 x 10(exp 6) and 32.1 x 10(exp 6), respectively. Transition on both models occurred at a local Reynolds number of 1 x 10(exp 6) to 2 X 10(exp 6) based on distance from the stagnation point. Transition Reynolds numbers based on momentum thickness were between 320 and 380 for the blunt cone. The model surface roughness was 25 rms microinches or greater. Turbulent heat transfer to the conical surface of the blunt cone at a Mach number of 4 was 30 percent less than that to the surface of the sharp cone. Available theories predicted heat-transfer coefficients reasonably well for the fully laminar or turbulent flow conditions.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-RM-L57D04
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  • 12
    Publication Date: 2019-06-27
    Description: Skin temperatures and surface pressures have been measured on a slightly blunted cone-cylinder-flare configuration to a maximum Mach number of 9.89 with a rocket-propelled model. The cone had a t o t a l angle of 25 deg and the flare had a 10 deg half-angle. Temperature data were obtained at eight cone locations, four cylinder locations, and seven flare locations; pressures were measured at one cone location, one cylinder location, and three flare locations. Four stages of propulsion were utilized and a reentry type of trajectory was employed in which the high-speed portion of flight was obtained by firing the last two stages during the descent of the model from a peak altitude of 99,400 feet. The Reynolds number at peak Mach number was 1.2 x 10(exp 6) per foot of model length. The model length was 6.68 feet. During the higher speed portions of flight, temperature measurements along one element of the nose cone indicated that the boundary layer was probably laminar, whereas on the opposite side of the nose the measurements indicated transitional or turbulent flow. Temperature distributions along one meridian of the model showed the flare to have the highest temperatures and the cylinder generally to have the lowest. A maximum temperature of 970 F was measured on the cone element showing the transitional or turbulent flow; along the opposite side of the model, the maximum temperatures of the cone, cylinder, and flare were 545 F, 340 F, and 680 F, respectively, at the corresponding time.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-RM-L57B18
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  • 13
    Publication Date: 2019-07-12
    Description: The heat transfer and pressures on the surfaces of several flat-plate models with various external crosswise stiffener arrangements are presented. The tests were made in a free jet at Mach numbers of 0.77, 1.39, and 1.98 for Reynolds numbers of 3 x 10(exp 6), 7 x 10(exp 6), and 14 x 10(exp 6), respectively, based on a length of 1 foot. The addition of external crosswise stiffeners to the flat-plate models caused large pressure and heat-transfer variations on the surfaces of the models.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-RM-SL57E31a
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  • 14
    Publication Date: 2019-08-13
    Description: In the investigation of stability of a two-dimensional laminar flow with respect to small disturbances, a disturbance of the stream function moving downstream (in the direction of the x-axis) by the "partial wave formula" is described.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA/TM-1417 , Zeitschrift fuer Angewandte mathematik und Mechanik (Magazine for Applied Mathematics and Mechanics); 34; 9-Aug; 344-357
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  • 15
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    In:  CASI
    Publication Date: 2019-08-13
    Description: The literature on turbulent heat transfer has in the course of years attained a considerable volume. Since this very complicated problem has not as yet found a complete solution, further studies in this field may be expected. The heat engineer must therefore accomodate himself to a constantly increasing number of theories and formulas. Since the theories generally start from hypothetical assumptions, and since they contain true and false assertions, verified knowledge and pure suppositions often being intermingled in a manner difficult to tell them apart, the specialist had difficulty in forming a correct evaluation of the individual studies. The need therefore arises for a presentation of the problem of turbulent heat transfer which is not initially bound by hypothetical assumptions and in which uninvestigated can be clearly distinguished form each other. Such a presentation will be given in the present treatment. Brief remarks with regard to the development of the theory of local heat transfer are included.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1408 , Archiv f. die Gesamte Waermetechnik; No. 6/7
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  • 16
    Publication Date: 2019-07-11
    Description: Measurements of aerodynamic heat transfer have been made along the hemisphere and cylinder of a hemisphere-cylinder rocket-propelled model in free flight up to a Mach number of 3.88. The test Reynolds number based on free-stream condition and diameter of model covered a range from 2.69 x l0(exp 6) to 11.70 x 10(exp 6). Laminar, transitional, and turbulent heat-transfer coefficients were obtained. The laminar data along the body agreed with laminar theory for blunt bodies whereas the turbulent data along the cylinder were consistently lower than that predicted by the turbulent theory for a flat plate. Measurements of heat transfer at the stagnation point were, in general, lower than the theory for stagnation-point heat transfer. When the Reynolds number to the junction of the hemisphere-cylinder was greater than 6 x l0(exp 6), the transitional Reynolds number varied from 0.8 x l0(exp 6) to 3.0 x 10(exp 6); however, than 6 x l(exp 6) when the Reynolds number to the junction was less, than the transitional Reynolds number varied from 7.0 x l0(exp 6) to 24.7 x 10(exp 6).
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-RM-L57D04a
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  • 17
    Publication Date: 2019-08-13
    Description: The unsteady aerodynamic forces, [based on two-dimensional incompressible flow considerations], are determined for an unstaggered cascade, the blades of which are vibrating in phase in an approach flow parallel to the blades.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA/TM-1412 , Zeitschrift fuer Angewandte Mathematik und Mechanik (Magazine for Applied Mathematics and Mechanics); 35; 3; 81-88
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  • 18
    Publication Date: 2019-07-11
    Description: The net heat of combustion of the product formed by the reaction of diborane with a mixture of acetylene and ethylene was found to be 20,440 +/- 150 Btu per pound for the reaction of liquid fuel to gaseous carbon dioxide, gaseous water, and solid boric oxide. The measurements were made in a Parr oxygen-bomb calorimeter, and the combustion was believed to be 98 percent complete. The estimated net-heat of combustion for complete combustion would therefore be 20,850 +/- 150 Btu per pound.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-RM-E53H18
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  • 19
    Publication Date: 2019-07-11
    Description: The heat of combustion of the product formed by the reaction acetylene and diborane was found to be 20,100 +/- 100 Btu per pound for the reaction of liquid fuel to gaseous carbon dioxide, gaseous water, and solid boric oxide. The measurements were made in a Parr oxygen-bomb calorimeter, and chemical analyses both of the sample and of the combustion products indicated combustion in the bomb calorimeter to have been 97 percent complete. The estimated net heat of combustion for complete combustion would therefore be 20,700 +/- 100 Btu per pound.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-RM-E53K10
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  • 20
    Publication Date: 2019-07-13
    Description: In dusty air flows occurring in industrial practice in transport by air pressure of friable materials, in the drying, annealing, and so forth, of a pulverized solid mass in suspension, and in other processes, the concentration of solid particles usually has a magnitude of the order of 1 kg per 1 kg of air. At such a concentration, the ratio of the volume of the particles to the volume of the air is small (less than one-thousandth part). However, regardless of this, the presence of a solid admixture manifests itself in the rules for the velocity distribution of the air in a dusty air flow. As a result, the rules of velocity change are different for clean and for dusty air flows. The estimation of the influence of the admixture on the velocity of the motion of the flow presents a definitive interest. One of the attempts to estimate that influence on the axial velocity of a free axially symmetrical jet with admixtures was made by Abramovich. Abramovich assumed beforehand that the fine particles of the admixture in the jet are subject to the motion of the air (that is, that the velocity of the admixture is approximately equal to the local velocity of the air); he then took as the basis of his considerations, in solving the problem, the condition that the amount of motion of the two-phase jet must be constant.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1430 , Zhurnal Tekhnicheskoi Fiziki; XXI; 5; 1060-1063
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  • 21
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 1-6 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: On the Corrosion of Wine Bottle aps Made of Thinly Tinned Lead (Tinfoil Caps) and their TestingSeveral method have been developed for the testing of the thickness and porosity of the tin layers of the customary tinfoil caps. The tin layers of commercial wine bottles were found to be less than 0,001 mm and for a great part considerably porous.To test the resistance of the caps to corrosion, laboratory experiments and practical storage tests have been carried out with commercially capped bottles. Under certain conditions which might be met in practice the caps were corroded considerably, and in some cases they were deteriorated totally. The corrosion products are lead salts.
    Notes: Es wurden Verfahren für die Prüfung der Dicke und der Porigkeit der Zinnauflage auf den üblichen sogenannten “Stanniol” - Flaschenkapseln entwickelt. Kapseln von aus dem Handel bezogenen Weinflaschen waren fast stets unter 0,001 mm dick verzinnt und meist erheblich porig.Zur Prüfung der Korrosionsbeständigkeit der Kapseln wurden Laboratoriumsversuche mit Kapseln und praktische Lagerversuche mit handelsüblich verkapselten Flaschen ausgeführt. Unter gewissen Bedingungen, die in der Praxis durchaus vorkommen können, wurden die Kapseln unter Bildung von Bleisalzen erheblich korrodiert, in einigen Fällen sogar völlig zerfressen.
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  • 22
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 24-26 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 23
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 17-23 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: On the Anodic behavior of copper zinc alloys in sodium cyanide solutions IThe solubility of alloyed metal anodes is conditioned by the potential of the most not noble constituent of the alloy and the solubility of te cover primary formed on the surface of this constituent. Zinc and brass could be passivated much more easily tan copper. Both the constituents of the alloy react indepently just loke the pure metals. α + β bras is more active and can not be passivated as easily as α-brass. There are only gradual differences between the corrosion processes as well as between the reactions of anodic solution or passivation. The two metals dissolve one after the other and get passivated iin a process consisting of two steps. The voltage of the alloy shows the existence of a small depolarizing effect of teh metals upon one another.
    Notes: Die Löslichkeit von Legierungsanoden wird durch das Potential des unedelsten Bestandteiles der Legierung und die Löslichkeit der sich auf diesem Bestandteil primär ausbildenden Deckschicht bestimmt. Zink und Messing ist leichter zu passivieren als Kupfer. Beide Bestandteile reagieren in der Legierung unabhängig voneinander ähnlich wie die reinen Metalle, α + β-Messing ist aktiver und daher schwerer zu passivieren als α-Messing. Zwischen den Korrosionserscheinungen sowie den Vorgängen bei der anodischen Auflösung oder Passivierung der Legierungsanode bestehen nur graduelle Unterschiede. die beiden Metalle geben nacheinander in Lösung und werden in zwei Stufenprozessen passiv. Die Potentiale der Legierung zeigen eine geringe depolarisierende Wirkung der beiden Einzelmetalle aufeinander.
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  • 24
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 69-73 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Polythylene plastic pipesPipes of soft and hart polythylene (Supralen soft and supralen hard) are gaining increasing application in constructions for transport of aggressive liquids and gases because of their good properties especially owing to their resistance to corrosion. So this paper presents a general and up to date survey of the commercial types and their dimensions and of the physical (mechanical, thermal, electric, hydraulic, acoustic, optical properties) and corrosion chemical behavior as well as te installation and fitting of polythylene pipes.
    Notes: Rohre aus Weich- und Hartpolyäthylen (Supralen, weich und Supralen, hart) finden infolge ihrer guten allgemeinen und spezifischen Eigenschaften, insbesondere ihres ausgezeichneten korrosionschemischen Verhaltens, zunehmende Verwendung in Anlagen zur Förderung aggressiver Flüssigkeiten und Gase. Im Hinblick darauf gibt der vorliegende Fortschrittsbericht einen zusammenfassenden und zeitgemäßen Überblick über Lieferarten und Dimensionierung, über das physikalische (mechanische, thermische, elektrische, hydraulische, akustische und optische Eigenschaften) und korrosionschemische Verhalten sowie über die Verlegung und Verbindung von Polyäthylen-Plastikrohren.
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  • 25
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 74-76 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: On an method for removal of boiler scaleThe solid incrustations in boilers etc. are removed usually by application of certain acids at those places of the devices where the incrustations have been formed. It is wellknown that the aggressive effect of the acids upon cleaned metal surfaces could be prevented by an addition of certain substances with inhibitive effect which will say that these substances decrease or even prevent acid attacks. The peper contains a report on the inhibitive effect of the „Brindi“-resin and some theoretical conclusions drawn from the experimental results.
    Notes: Feste Steinbildungen in Kesseln usw. werden in neuerer Zeit bekanntlich da-durch beseitigt, daß sie in den Anlagen, in denen sie sich gebildet haben, durch bestimmte Säuren gelöst wurden. Es ist auch bekannt, daß die aggressive Wirkung der Säuren auf die Metallflächen, die unter den Steinbildungen liegen, wenn letztere aufgelöst sind, dadurch verhütet wird, daß der Säure bestimmte Stoffe zugesetzt werden, die als Inhibitoren wirken, d. h. den Säureangriff verringern oder u. U. ganz verhüten. Im vorliegenden Aufsatz ist die diesbezügliche Wirkung des „Brindiharzes“ als Inhibitor laboratoriumstechnisch festgestellt und versucht worden, aus den Ergebnissen einige theoretische Folgerungen zu ziehen.
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  • 26
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 96-97 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 27
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 98-99 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 28
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 104-106 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 29
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 114-114 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 30
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 115-116 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 31
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 116-116 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 32
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 33
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 121-122 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 34
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 299-301 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 35
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 302-305 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 36
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 313-313 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 37
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 315-315 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 38
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. X 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 39
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 345-345 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Will lead colors become dispensable?Minium is a theoreically ideal protective pigment whose application may be entrusted without any danger even to little trained personnel. Protective covers are formed in the minimum film which prevent underrusting. Its electrochemical effect upon the metallic surface is independent of the chemical properties of the binder. Iron wash primers free from lead may be applied only under certain conditons. New directions confirm that lead colors are indispensable.
    Notes: Die Bleimennige ist ein „theoretisch ideales“ Schutzpigment, dessen anwendung man völlig gefahrlos auch weniger geschulten Hilfskräften überlassen kann.  -  In ihrem Film bilden sich Schutzschichten, die die Unterrostung verhindern.  -  Ihre elektrochemische Einwirkung auf den metallischen Untergrund ist von der chemischen Natur des Bindemittels unabhängig.  -  Bleifreie Eisengrundiermittel sind nur bedingt anwendbar.  -  Neue Betriebsvorschriften bestätigen die Unentbehrlichkeit der Bleifarben.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 357-360 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 369-370 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 99-101 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 114-114 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 116-116 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 117-117 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 122-123 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 125-131 
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    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: The Vanal Process A new Way to Protection against CorrosionThe Paper contains a description of a new method to protect the surface of fireproof building-materials against untimely corrosion at high temperatures. The protective effect depends on surface tension. So this principle has been applied to protection against corrosion for the first time. Suitably arranged protective covers prevent any penetration of gases and slags. The technological and economical advantages of this process especially by application of silicon carbide are explained by means of practical examples.
    Notes: Es wird ein neues Verfahren beschrieben, durch das die Oberflächen feuerfester Baustoffe vor vorzeitiger Korrosion bei hohen Temperaturen geschützt werden. Die Wirkung beruht auf dem Gesetz der Oberflächenspannung, das hierfür erstmalig angewandt wird. Durch entsprechend ausgerichtete Schutzschichten wird das Eindringen von Gasen und Schlacken verhindert. An Hand von Beispielen as der Praxis wird der technische und wirtschaftliche Vorteil dieses Verfahrens besonders bei Siliciumcarbid erläutert.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 170-170 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 240-240 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 244-244 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 448-448 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 587-596 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: Corrosion in High-Temperature-BoilersExperiences with corrosion of highly heat resisting steels in high temperature boilers in Germany are discussed by means of the working 600° boilers after 40 000 h of operation. Steam scalling in pure steam is very low. As soon as steam will be solid noticeably corrosive attacks will become dangerous. According to the high standard to water treatment such effects could be prevented so that damages caused by the water must be considered unusual.Damages caused by smoke occured as soon as the flying ashes contained alkali sulfates. The area of damage will be there where a eutectic mixture of sulfates could melt. There are some measures how to prevent this corrosion.Steels containing vanadium may not be used above 600°C as vanadium scaling might occur which was learnt in burning oils containing vanadium.
    Notes: Die Erfahrungen über das Korrosionsverhalten der hochwarmfesten Stähle in Hochtemperaturkesseln werden in Deutschland an Hand der im Betriebe befindliche 600°-Kessel nach rd. 40 000-stündiger Betriebszeit besprochen. Die Dampfzunderung in reinem Dampf ist gering. Gefahren treten erst auf, sobald der Dampf merkbar verunreinigt ist. dieses läß sich bei dem heutigen hohen Stande der Wasseraufbereitung vermeiden, so daß Korrosionsschäden von der Wasserseite her als ungewöhnlich zu betrachten sind.Schäden von der Rauchgasseite her sind bekannt geworden, sobald in der Flugasche Alkalisulfate vorkommen. Der Schadensbereich liegt in erster Linie dort, wo ein Eutektikum der Sulfate zu schmelzen vermag. Es werden Wege angegeben, wie diese Korrosion zu vermeiden ist.Vanadinhaltige Stäle scheiden für Temperaturen oberhalb 600° aus, da dann dieselbe Vanadinzunderung auftreten kann, welche von der Verfeuerung vanadinhaltiger Öle her bekannt ist.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 610-614 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 629-631 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 622-628 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 291-293 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 294-296 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 297-298 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 313-313 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 314-314 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 314-315 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 324-329 
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    Description / Table of Contents: Polyvinylchloride Plastik PipesPipes of polyvinylchloride (Supradur) are gaining increasing application in contructions for transport of aggressive liquids and gases because of their good properties especially owing to their resistance to corrosion. So this paper presents a general and up to date survey of the commercial types and their dimensions and of the physical and corrosion chemical behavior as well as the methods of installation and fitting of polyvinylchloride pipes.
    Notes: Rohre aus Polyvinylchlorid (Supradur) finden infolge ihrer guten allgemeinen und spezifischen Eigenschaften, insbesondere ihres ausgezeichneten Korrosionschemischen Verhaltens, zunehmende Verwendung in Anlagen zur Förderung aggressiver Flüssigkeiten und Gase. Im Hinblick darauf gibt der vorliegende Fortschrittsbericht einen zusammenfassenden und zeitgemäßen Überblick über Lieferarten und Dimensionierung, über das physikalische und korrosionschemische Verhalten sowie über die Verlegung und Verbindung von Polyvinylchlorid-Plastikrohren.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 349-352 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 385-389 
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    Description / Table of Contents: Graphical representation of the theory of local cellsThe article is concerned with a graphical representation of the theory of local cells by means of the experimentally realized relation \documentclass{article}\pagestyle{empty}\begin{document}$$ e_1 - e_0 = i\frac{{{\rm W}_{\rm a} \cdot {\rm W}_{\rm k}}}{{{\rm W}_{\rm a} + {\rm W}_{\rm k}}} $$\end{document} respectively by a corresponding relation regarding the influences of alterations of polarization. e1 is the total voltage of the electrode bearing the local cell. The voltages of the local cell are cA and cK and its current is i. eo is the total voltage of the electrode at i = 0. Wa and Wk are the coefficients of resistance of the anodic and cathodic locations. Fig. 1. The diagram containing all the partial terms necessary to describe the properties of local cells results from the numerical relations between the constant terms c and W. Fig. 2. The author shows that you will be unable to construct the diagram on basis of the relation above mentioned only. In special cases only some of the partial terms mentioned are available. For the terms c and W depending on current density the diagram is given by curves resulting from a great number of experimental data.
    Notes: Der vorliegende Artikel verfolgt die graphische Darstellung der Konzeption von Lokalelementen auf Grund der experimentell zugänglichen Beziehung \documentclass{article}\pagestyle{empty}\begin{document}$$ e_1 - e_0 = i\frac{{{\rm W}_{\rm a} \cdot {\rm W}_{\rm k}}}{{{\rm W}_{\rm a} + {\rm W}_{\rm k}}} $$\end{document} bzw. einer entsprechenden Beziehung, in welcher Rücksicht genommen wurde auf die Polarisationsänderungen der Potentiale und Widerstände. ei ist das Gesamtpotential der Elektrode mit dem Lokalelement, dessen Potentiale εa und εk sind, bei einem Stromdurchgang i, eo ist das Gesamtpotential derselben Elektrode bei i = 0. Wa bzw. Wk sind die Widerstands-werte an der anodischen bzw. kathodischen Stelle (s. Abb. 1). Aus den rechnerischen Beziehungen, die für konstante Werte ε und W gelten, folgt das Diagramm, in welchem man alle Teilgrößen, die in der Konzeption der Lokalelemente vorkommen, wiederfinden kann (s. Abb. 2). Es wird darauf aufmerksam gemacht, daß die obenerwähnte Beziehung nicht zur Konstruktion dieses Diagramms genügt. Man muß jedoch zu diesem Diagramm kommen, wenn man für denselben Zweck in Sonderfällen einige der erwähnten Teilgrößen kennt. Bei den Größen ε und W, die stromabhängig sind, ist das entsprechende Diagramm durch Kurven gegeben, zu denen man eine gehörige Zahl Versuchsangaben kennen muß.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 410-414 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 430-430 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 444-444 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 444-444 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. XVI 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 574-579 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: On the Influence of Trace Elements on the Non Scaling Properties of High Temperature Resistent AlloysThe alloys which are employed at heat transport materials are noted out by more or less high contents of trace elements of which calcium and cerium are the most important ones. These additives cause a considerable improvement of the resistance to oxidation. The results of high temperature oxidation experiments of allosy with and without those quality improving additives are reported. The author shows that the effectivity of those elements is caused by an increased adhesiveness of the oxide layer which is formed during the high temperature glowing.The results of x-ray-photographic and spermicroscopic investigations on the problem of the formation of the oxide layers on ion-chrome-aluminium-alloys are published.
    Notes: Metallegierungen, die als Heizleiterwerkstoffe Verwendung finden, zeichnen sich durch einen mehr oder weniger hohen Gehalt an gewissen Spurenelementen aus, unter denen Calcium und Cer die bedeutendste Rolle spielen. Diese Zusätze bedingen eine erhebliche Verbesserung der Oxydationsbeständigkeit der Heizleiterlegierungen. Es wird über experimentelle Ergebnisse der Hochtemperatuorxydation solcher Legierungen mit und ohne qualitätserhöhende Zusätze berichtet und nachgweisen, daß der Effekt jener Elemente in der Verbesserung der Haftfestigkeit der sich während der Hochtemperaturglühung ausbildenden Oxydschicht zu suchen ist.Zur Frage der Oxydausbildung auf Eisen-Chrom-Aluminium-Legierungen werden röntgenographische und elektronenmikroskopische Ergebnisse mitgeteilt.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 596-602 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: New Methods of Iron Protection in SoilsThe conditions of formation of the active and passiv behavior of iron are given. The structure of the soil resp. the alteration of the capillar and noncapillar porosity play a decisive role. Then the factors like solid water, soil air, soil resistance and acidity which influence the corrosion processes in soils are discussed. The ratio soil water to soil air was found to be characterizing the corrosion of iron in soils. Every soil has a specific aggressivity which is determined by the water capacity of the soil.The authors gives further advices how to decrease the corrosion of iron in soils with and without cathodic protection, by addition of inhibitors and by preparing artificial airation cells.
    Notes: In der vorliegenden Arbeit werden zuerst die Bedingungen für das Zustandekommen eines aktiven bzw. passiven Verhaltens des Eisens gegeben, wobei Bodenstruktur bzw. Änderungen der kapillaren und nichtkapillaren Porosität des Bodens eine entscheidende Rolle spielen. Anschließend werden die die im Boden ablaufenden Korrosionsprozesse beeinflussenden Faktoren diskutiert, and zwar Bodenwasser, Bodenluft, Bodenwiderstand und Wasserstoffionen-Konzentration. Dabei wurde das Verhältnis, „Bodenwasser zu zu Bodenluft“ als maßgebender, die Eisenkorrison im Erdboden regulierender Faktor, gefunden. Jeder Boden besitzt eine spezifisches Aggressivität, die durch das Annahmevermögen des Bodens an Wasser bestimmt ist.In der Arbeit werden weiter Ratschläge für der Verminderung der Eisenkorrosion im Erdreich ohne und mit kathodischem Korrosionsschutz, durch Zusatz chemischer Hemmstoffe und durch Erzeugung eines künstlichen Belüftungselementes gegeben.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 603-606 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Rubber for Protection against CorrosionA survey of the mechanic and chemical properties of protective materials, especially rubber vulcanizates, is followed by a description of the working and testing methods which explains the special requirements of DIN 28051 and 28055 to operating and designing engineers.Furthermore the properties of rubber plated pipes are compared with those of massive plastic pipes. Before the chemical behavior of protective rubber coverings is discussed in general the behavior of protective paints is treated. The applicability of synthetic elastomers could not be discussed in detail. As mentioned in the first part of the artidle they may not be judged on their chemical behavior only. Then the latest development of those plastic materials is commented which will show better resistance to oxidizing agents. They are interesting products of the oldest hard rubber manufactury which has been producing plastics for mroe than 50 years and which together with a French manufactory has been leading in development and introduction of hard an soft rubber coating since 1885.
    Notes: Nach einem Überblick über die mechanischen und chemischen Voraussetzungen von Korrosionsschutzmaterialien, insbesondere Kautschukvulkanisaten, werden Arbeits- und Prüfverfahren geschildert, die dem Betriebsmann und Konstrukteur von Apparatebauteilen die besonderen Anforderungen der DIN 28051 und 28055 erläutern.Ferner werden die Eigenschaften gummiplattierter Rohrleitungen denen von Massivrohrleitungen auf Kunststoffbasis gegenübergestellt. Bevor auf das allgemeine chemische erhalten von Schutzgummierungen eingegangen wird, wird das Verhalten von Anstrichen als Korrosionsschutz behandelt. Ohne im Detail auf die Einsatzmöglichkeiten synthetischer Elastomere, die, wie im ersten Tel des Aufsatzes hervorgehoben wird, keineswegs lediglich aus deren chemischen Verhalten beurteilt werden dürfen, einzugehen, werden kurz neuere Entwicklungen von Kunststoffen gestreift, die geeignet zu sein scheinen, die bestehende Lücke gegen stark oxydierende Medien zu schließen. Es sind besonders interessante Erzeugnisse des ältesten europäischen Hartgummi-Werkes, das seit über fünf Jahrzehnten auch andere Kunststoffe herstellt und das neben einer französischen Firma maßgeblich an der Einführung und Entwicklung der Hart- und Weichgummierungen seit 1885 beteiligt ist.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 634-640 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 649-649 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 656-656 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 651-656 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 669-673 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: Investigations on the Influence of Oxygen upon Iron SurfacesThe behavior of solid and pyrophorus iron surfaces upon commercial and purified nitrogen and their tendencies to oxidation was investigated. Stroing both the materials in pure nitrogen the gas does not influence the tendency to oxidation as demonstrated by special glowing experiments. The decrease of pyrophority of iron powder being stored in commercial nitrogen is explained by the presens of traces of oxygen in the protective gas which cause a slow but undisturbed formation of an oxide layer.
    Notes: Hinsichtlich ihres Verhaltens gegenüber technischen und gereinigten Stickstoff und ihrer anschließenden Oxydationsneigung untersucht wurden kompakte eisenoberflächen und pyrophore Eisenpulver. Spezial-Glühversuche ergaben, daß bei der Lagerung beider Werkstoffe in Reinst-Stickstoff dieser selbst keinen Einfluß auf die Oxydationsneigung des Eisens ausübst. Die Verhinderung der Pyrophorität von Eisenpulver durch Lagerung in technischem Stickstoff wird auf eine langsam, feinbaulich geregelt aufwachsende Oxydschicht durch im Stickstoff vorhandene Sauerstoffspuren zurückgeführt.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 695-696 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 717-717 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 725-726 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 566-568 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 793-794 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 794-794 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 795-795 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 32-33 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 49-49 
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 59-59 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 67-69 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: Indications on how to treat and how to use platinium crucibles and traysThe durability of laboratory instruments like crucibles, trays, tongs etc. made of platinium could be prolonged by proper and suitable treating. To avoid high temperatures, greasy storage places and the effect of smoking flames and reducing atmospheres will be as useful as to take precautions in the mechanical removal of melting remainders, Numerous experiments could be carried out in platinium vessels without any danger for the material if you know and regard its pecularities.
    Notes: Die Lebensdauer von Laborgeräten wie Tiegeln, Schalen, Zangen usw. aus Platin kann durch sachgemäße Behandlung wesentlich verlängert werden. Vermeidung hoher Temperaturen, verschmutzter Abstellflächen und des Einflusses rauchender Flammen und reduzierender Atmosphären sind ebenso nützlich wie Vorsicht bei der mechanischen Entfernung von Schmelzrückständen. Zahlreiche Reaktionen lassen sich in Platingefäßen ohne Gefahr für den Werkstoff ausführen, wenn man dessen Eigenarten kennt und ihnen in geeigneter Weise Rechnung trägt.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 30-31 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 123-124 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 133-138 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: The corrosion of soft steel in alkali mono- und alkali hydrogen fluorides I. The influence of the concentration of the solution upon the corrosion of soft steelThe influece of the concentration of alkali mono  -  and alkali hydrogen fluoride solutions upon the corrosion of soft steel has been investigated. In all solutions a corrosive attack is taking place. It depends on the concentration of the soultion. The corrosion velocity  -  concentration diagramm shows a characteristic tershold value which is followed by an approximation to a minimum. In KF- and KF·HF solutions corrosion resistant covers are formed finally while in (NH4)F HF solutions even at relatively high concentrations a corrosive attack was recorded.
    Notes: Untersucht wurde der Einfluß der Konzentration von Alkalimono- und Alkalihydrogenfluorid-Lösungen auf die Korrosion von Weichstahl. In allen Lösungen kommt es zu einem konzentrationsabhängigen Angriff. Die Korrosionsgeschwindigkeit-Konzentrationskurve weist einen charakteristischen Schwellenwert auf, nach dessen Überschreiten strebt die Korrosionsgeschwindigkeit- Konzentrationskurve einem Minimum zu. In KF- und in KF · HF-Lösungen kommt es schließlich zur Ausbildung korrosionsschützender Deckschichten, während in (NH4)F · HF-Lösungen selbst bei verhältnismäßig hohen Konzentrationen noch ein gewisser Angriff zu verzeichnen ist.
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 158-163 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 171-177 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 8 (1957), S. 177-178 
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    Keywords: Chemistry ; Polymer and Materials Science
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