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Effect of electrolyte concentration on the passivation of Zn in alkaline solutions

โœ Scribed by A. M. Shams El Din; F. M. Abd El Wahab; S. M. Abd El Haleem

Publisher
John Wiley and Sons
Year
1973
Tongue
German
Weight
641 KB
Volume
24
Category
Article
ISSN
0947-5117

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โœฆ Synopsis

Abstract

In 0,01โ€“0.3 N NaOH solutions and under galvanostatic and potentiostatic conditions Zn(OH)~2~ is formed and is later transformed in oxide of higher valence state. In solutions above 0.3 N ZnO is precipitated after hydrolysis of Zn(OH)~2~ an this ZnO forms a passivating surface layer. This layer does not undergo any further thickening nor transformation into ZnO~2~.

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