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  • Wiley-Blackwell  (5)
  • Cambridge University Press  (3)
  • 1975-1979  (8)
  • 1
    Electronic Resource
    Electronic Resource
    Die Inhibition von KühlkreisläufenVorgetragen am 214. DECHEMA-Kolloquium am 28. November 1974. (1975)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 26 (1975), S. 192-199 
    Details
    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: The inhibition of cooling systemsThe choice of an efficient corrosion inhibitor has to take in account the type of the cooling system, the materials used as well as the specific operating conditions, for instance - very low or very high velocities of the cooling water- heat transfer- the inhibitor may be asked to have some lubricating properties- vibrations, that can cause cavitation or fatigue corrosion- interaction between the corrosion inhibitor and other electrochemical systems of corrosion protection (cathodic protection).In numerous applications it is necessary to improve the inhibition by an addition of other effective substances (like dispersants, hardness stabilizers, mixture of inhibitors with selective protection properties).
    Notes: Die Auswahl eines Kühlwasserinhibitors richtet sich nach der Art des Kühlsystems und der darin verwendeten Werkstoffe sowie nach den spezifischen Beanspruchungen, so z. B.- extrem hohe oder niedrige Strömungsgeschwindigkeiten des Kühlmediums,- hohe Wärmebelastung der zu Kühlenden Metallwand,- Reibungsvorgänge, wobei der Inhibitor zusätzlich eine Schmierfunktion ausüben muß,- Vibrationen, die zu Kavitationserscheinungen oder zur Werkstoffermüdung führen Können,- Wechselwirkungen des Inhibitors mit anderen elektrochemischen Schutzverfahren (z. B. lokaler kathodischer Schutz von hochbeanspruchten Zonen des Kühlsystems).In zahlreichen Fällen ist es zudem notwendig, die Wirksamkeit der Inhibierung durch den Zusatz von weiteren Wirkstoffen zu unterstützen (Dispergiermittel, Härtestabilisatoren, Gemische von Inhibitoren mit selektiver Schutzwirkung).
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19750260304
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  • 2
    Electronic Resource
    Electronic Resource
    Prüfung und Auswahl von KavitationsinhibitorenVortrag, gehalten an der Università di Ferrara anläßlich des 4. Europäischen Symposiums über Korrosionsinhibitoren, September 1975. (1976)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 27 (1976), S. 425-431 
    Details
    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: Testing and Selecting Cavitation InhibitorsAn investigation has been made into possibility of using electrochemical procedures as well as the gravimetrical method for testing cavitation inhibitors. The relation between the structure of the inhibitor, the nature and form of the cavitation attack and the mechanism of destruction was also examined. This work was performed with a group of conventional cooling water inhibitors and some pyridine compounds.It was shown that electrochemical investigations are less suitable for enabling inhibitors to be selected for high cavitation intensities, because electrochemical losses amount to only a relatively small part of the total loss of material. Nevertheless they are indispensable as a supplement to magnetostrictive investigations for appraising the overall performance of an inhibitor, because it has been found that a good cavitation inhibitor does not always achieve the same success against electrochemical corrosion.Furthermore it was demonstrated that interface inhibitors generally yield better results than membrane inhibitors or passivators. The protection afforded by interface inhibitors depends on their structure, the chain length and in the case of the pyridine components investigated the nature and position of the substituents in the pyridine ring.
    Notes: Es wurde untersucht, ob für die Erprobung von Kavitationsinhibitoren neben der gravimetrischen Methode auch elektrochemische Prüfverfahren eingesetzt werden können. Es wurde ferner der Zusammenhang zwischen Struktur des Inhibitors, Art und Form des Kavitationsangriffes und Mechanismus der Zerstörung untersucht. Diese Arbeit wurde mit einer Gruppe herkömmlicher Kühlwasserinhibitoren sowie mit einigen Pyridinverbindungen durchgeführt.Wie es sich zeigte, sind elektrochemische Untersuchungen weniger geeignet, eine Inhibitorauswahl bei hohen Kavitationsintensitäten zu ermöglichen, da die elektrochemische Metallauflösung nur einen relativ kleinen Teil des gesamten Abtrags ausmacht. Sie sind aber als Ergänzung zu magnetostriktiven Untersuchungen für die Beurteilung des Gesamtverhaltens eines Inhibitors unbedingt notwendig, da es sich gezeigt hat, daß nicht immer ein guter Kavitationsinhibitor mit demselben Erfolg gegen elektrochemische Korrosion eingesetzt werden kann.Wie sich außerdem herausstellte, liefern Grenzflächeninhibitoren in der Norm bessere Resultate als Membraneninhibitoren oder Passivinhibitoren. Bei den Grenzflächeninhibitoren ist die Schutzwirkung von der Struktur des Inhibitors abhängig, wobei insbesondere Kettenlänge und - bei den untersuchten Pyridinverbindungen - Art und Stellung der Substituenten eine wichtige Rolle spielen.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19760270606
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  • 3
    Electronic Resource
    Electronic Resource
    Die Inhibierung der Korrosion in industriellen Kühlsystemen (1979)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 30 (1979), S. 713-722 
    Details
    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
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19790301007
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  • 4
    Electronic Resource
    Electronic Resource
    The restoration of articular surfaces overlying replamineform porous biomaterialsPresented in part at the Sixth International Biomaterials Symposium, Clemson University, Clemson, South Carolina, April, 1974. (1977)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 11 (1977), S. 165-178 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: Replamineform porous implants (4 mm × 4 mm diameter) were placed into full-thickness cartilage and bone defects of the weight-bearing surface of the lateral femoral condyles of adult male white rabbits. These were analyzed at 1 day, 1 week, 6 weeks, 3 months, and 6 months for (1) ingrowth of tissue within the implants and (2) restoration of the articular surface overlying them. Appropriate unfilled, but similar, control defects were also studied.Mineralized bone was seen within the substance of both the TiO2 and hydroxyapatite implants at 1 week; this extremely rapid response was present in every specimen studied and was not seen with αAl2O3 or control animals. With the passage of time, maturation of this bone ingrowth occurred so that by 3 months, they were all incorportated into the surrounding bone.Only the hydroxyapatite implants showed consistent regenerative healing of hyaline articular cartilage from the margins of the defects with the passage of time; this occurred whenever the subchondral bone adjacent to the defect proliferated in a “creeping” fashion over the articular aspect of the implant, and the undamaged cartilage then followed it. Fibrocartilage, and not hyaline cartilage, formed the articular surface over the TiO2 and αAl2O3 implants and in the controls.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820110203
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  • 5
    Electronic Resource
    Electronic Resource
    A multichannel electro-optical detector for rapid acquisition of X-ray photoelectron spectroscopy data (1979)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 1 (1979), S. 45-46 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: An electro-optical detector easily adaptable to any hemispherical sector photoelectron spectrometer is described. The detector consists of a channel plate electron multiplier array, phosphor screen, silicon intensified target vidicon an optical multichannel analyzer control unit. Data collection rates are improved by more than two orders of magnitude over conventional single channel detectors.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740010109
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  • 6
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    The formation of layers in a double-diffusive system with a sloping boundary (1977)
    Cambridge University Press
    Details
    Publication Date: 1977-08-05
    Description: The flows induced by the presence of an insulating sloping boundary in a doublediffusive system are examined. In the diffusive case, when the component with the larger diffusivity is unstably distributed, it is known that under certain circumstances horizontal motions are induced near the slope, and that a series of horizontal layers forms. We investigate the formation and properties of the layers, in particular their vertical scale and its dependence on the stratification and the slope angle. The scale of the layers is found to be a strong function of Gρ, the ratio of the vertical density gradient of the unstably distributed component to that of the stably distributed component. At low values of Gρ, no layering was observed; at larger values of Gρ layers were formed, and their scale increased as Gρ → 1. A weak dependence of scale on slope angle was also observed with the scale diminishing as the angle of the slope to the horizontal increased. A new form of layering has been observed when the basic stratification is in the finger sense. At high enough values of Gρ the basic stratification is unstable to finger motions and these exist throughout the fluid. When a slope is introduced, horizontal motions are set up near the slope which cause the fingers to break down and layers are produced. There is considerable horizontal motion in these layers as well as convective motions driven by the fingers in the interfaces between the layers. The formation of these layers and some of their properties are documented. © 1977, Cambridge University Press. All rights reserved.
    Print ISSN: 0022-1120
    Electronic ISSN: 1469-7645
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Cambridge University Press
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  • 7
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    On the stability of thermally driven shear flow heated from below (1978)
    Cambridge University Press
    Details
    Publication Date: 1978-07-12
    Description: The onset of convection in shear flow driven by lateral heating and also uniformly heated from below is investigated numerically by Galerkin's method. Stress-free as well as rigid, perfectly conducting boundaries are considered. The analysis is valid for small and moderate Prandtl numbers. The magnitude of the lateral basic temperature gradient may be expressed by a dimensionless Grashof number G, while the uniform heating from below is represented by a Rayleigh number Ra. Depending on the values of G, Ra and the Prandtl number Pr, a variety of interesting situations arise. In particular it is demonstrated that the form of the most unstable mode, i.e. whether it is a roll with axis aligned along the basic flow (a longitudinal roll) or one with axis normal to the basic flow (a transverse roll), depends on the value of the Prandtl number. For small values of G, the marginally stable disturbances are found to be steady, while for larger values of G, oscillatory instability occurs. For all values of G considered here (G ≲ 3000), computations of the energy balance for the marginally stable disturbances show that the main instability mechanism is of thermal origin, while the effect of shear may be important in selecting the preferred mode of disturbance. © 1978, Cambridge University Press. All rights reserved.
    Print ISSN: 0022-1120
    Electronic ISSN: 1469-7645
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Cambridge University Press
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  • 8
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    Ice Floes in Collision (1978)
    Cambridge University Press
    Details
    Publication Date: 1978-01-01
    Description: An event recorded by a biaxial tilt-meter during a storm at the camp of the AIDJEX Pilot Study located on the pack ice in the Beaufort Sea in 1972 is interpreted as an acceleration caused by the collision of a faster drifting ice floe with the station floe. It is estimated that the acceleration lasted between 20 and 40 s and resulted in a velocity increase of between 84 and 120 m/h. The energy imparted per square kilometer to the station floe during collision is estimated to be between 5.7 and 8.1 MJ.The station was equipped with an acoustic bottom reference (ABR) system with a sampling rate of one minute. However, the positional scatter is too large and the sample rate too low to be able reliably to identify the collision event from the ABR data alone.
    Print ISSN: 0022-1430
    Electronic ISSN: 1727-5652
    Topics: Geography , Geosciences
    Published by Cambridge University Press on behalf of International Glaciological Society.
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