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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 182-189 
    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 corrosion of CuZn alloys in Chloride solutions with potentiostatic polarisationThe intercrystalline corrosion susceptibility of brasses can be studied either by potentiostatic methods in NH4Cl+HCl solutions with polarisation to +80 mV, or - without polarisation - in NH4Cl+HCl+CuSO4 solutions where the potential of +80 mV is attained without external polarisation. Tests carried out with macroelements formed either by brasses having different structures (α, β/α), or identical structure (α) but different zinc contents (21 and 32% respectively) have shown the preferential attack of the β phase at potentials lower than those required for grain boundary dissolution, and the more anodic character of the alloys of higher zinc content.
    Notes: Die Anfälligkeit von CuZn-Legierungen für interkristalline Korrosion kann entweder potentiostatisch untersucht werden, und zwar in NH4Cl+HCl-Lösungen mit Polarisation auf +80 mV, oder - ohne Polarisation - in NH4Cl+HCl+CuSO4-Lösungen, denn dort stellt sich das Potential von +80 mV auch ohne äußere Polarisation ein. Versuche mit Makroelementen aus entweder Messungen verschiedener Struktur (α, β/α) oder gleicher Struktur (α), jedoch verschiedener Zn-Gehalte (21 bzw. 32%) haben gezeigt, daß die β-Phase bevorzugt angegriffen wird, und zwar bei niedrigeren Potentialen als zur Auflösung der Korngrenzen erforderlich sind, und daß die Legierungen höheren Zn-Gehalts stärker anodisch sind.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
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