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  • Polymer and Materials Science  (10,227)
  • 1965-1969  (8,218)
  • 1950-1954  (2,009)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 19 (1968), S. 1074-1076 
    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
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 19 (1968), S. 836-836 
    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
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 1-12 
    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: Investigation into the pitting corrosion of passive austenitic CrNi steels in neutral chloride solutionsStainless steels of the 18/8 CrNi-Type suffer pitting corrosion by halogen ions. Potentiokinetic, galvanostatic and potentiostatic tests as well as the ferro-ferricyanide-tests showed that pitting susceptibility increases with Cl- content, temperature and oxygen content of the electrolyte, with decreasing homogeneity and purity of the material. Cold-working is without significant influence on the pitting potential. Mn up to 11,2% increases pitting potential by 50 mV, Ni up to 25% increases the potential by 200 mV, Cr up to 30 and Mo up to 4,6% increase the potential by max. 900 mV in 3% NaCl of pH 7,5 at 22° C. The four methods employed gave the same pitting potentials. Before arriving at the potential of stationary pitting all steels showed a region where formation and repassivation of single pits occur.Cathodic protection to suppress pitting causes H2-absorption. The amount of absorbed H2 increases as the potential becomes more negative. Hydrogen embrittlement was not observed. The absorbed H2 impairs pitting resistance. The study of Cl--adsorption as a pitting releasing process by help of the potentiostatic method, working with a reference source of triangular alternating voltage gave no indication of a preferential Cl--adsorption or an Cl--adsorption-potential near the pitting potential.
    Notes: Passive 18/8 Cr-Ni-Stähle unterliegen der durch Halogenionen hervorgerufenen Lochfraßkorrosion. Die Durchführung potentiokinetischer, potentiostatischer und galvanostatischer Versuche sowie des Indikatortestes zeigte, daß die Lochfraß-anfälligkeit von Chrom-Nickel-Stählen mit dem Chlorionengehalt, der Temperatur und dem Sauerstoffgehalt des Elektrolyten sowie mit abnehmender Homogenität und Reinheit des Werkstoffes ansteigt. Eine Kaltverformung zeigt keinen eindeutigen Einfluß. Überhöhte Potential-Vorschubgeschwindigkeiten verfälschen das Ergebnis der potentiokinetischen Messungen des Lochfraßpotentials. In 3%iger NaCl-Lösung vom pH-Wert 7,5 bei 22° C erhöhen Mn-Gehalte bis 11,2% und Ni-Gehalte bis 25% das Lochfraßpotential um maximal 50 bzw. 200 mV, Cr-Gehalte bis 30% sowie Mo-Gehalte bis 4,6% steigern das Lochfraßpotential um maximal 900 mV. Die vier Untersuchungsverfahren ergaben Übereinstimmende Ergebnisse bzw. Lochfraßpotentiale. Alle Stähle zeigten vor dem Potential des stationären Lochfraßes einen Potentialbereich, in dem repassivierbarer Lochfraß beobachtet wurde.Kathodischer Schutz zur Verhinderung von Lochfraß bewirkt eine mit negativer werdendem Potential zunehmende Wasserstoffaufnahme, jedoch keine Beeinflussung der Kerbschlagzähigkeit. Dagegen vermindert der aufgenommene Wasserstoff die Lochfraßbeständigkeit des Stahls. Die Untersuchung der Chlorionenadsorption als lochfraßauslösendem Vorgang mit der potentiostatischen Dreiecksspannungsmethode ergab keinen Hinweis auf die bevorzugte Cl--Adsorption oder ein Cl--Adsorptionspotential in der Nähe des Lochfraßpotentials.
    Additional Material: 15 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 35-37 
    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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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 30-35 
    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: Application of zirconium in chemical plant constructionIt ist in this decade only, that zirconium has become an established special material in chemical plant construction. Zirconium is used in particular where high corrosion resistance is required, e.g. with processes involving sulfuric, hydrochloric, nitric and phosphoric acids, chlorides (except ferric and cupric chlorides), alkalies, urea, hydrogen peroxide and lactic acid. Preferred types of equipment are reaction columns, pump casing, heat exchangers and tubing, e.g. in connection with the production of dyes, pigments (erosion resistance), foods, hydrogen peroxide and urea. The price of zirconium, though still high if compared with that of nickel-base alloys or high-alloy stainless steels is soon amortized as a consequence of the low maintenance requirement.
    Notes: Zirkonium ist im Laufe von nur 10 Jahren zu einem fest eingeführten Sonderwerkstoff des Apparatebaues geworden. Es wird vor allem bei hohen Ansprüchen an die Korrosionsbeständigkeit eingesetzt, z.B. bei Verfahren mit Schwefel-, Salz-, Salpeter- und Phosphorsäure, Chloriden (außer Eisen-III- und Kupfer-II-chlorid), Alkalien, Harnstoff, Wasserstoffsuperoxid, Milchsäure. Bevorzugte Apparaturen sind Reaktionstürme, Pumpengehäuse, Wärmeaustauscher und Rohrleitungen, z.B. bei der Herstellung von Farbstoffen, Pigmenten (Erosionsbeständigkeit), Nahrungsmitteln, Wasserstoffsuperoxid und Harnstoff. Der noch immer höhere Preis des Zirkoniums im Verleich mit Legierungen auf Bickelbasis oder hochlegierten nichtrostenden Stählen amortisiert sich bald aufgrund des geringen Wartungsbedarfs.
    Additional Material: 5 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 54-67 
    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
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 77-79 
    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
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 85-85 
    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
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 86-86 
    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
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969) 
    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
    Type of Medium: Electronic Resource
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