Article ID Journal Published Year Pages File Type
7893162 Corrosion Science 2018 22 Pages PDF
Abstract
Electrodeposited Zn-Cr alloy coatings show a high potential in protecting steel from corrosion. Investigations in sulphate solutions by electrochemical and analytical methods demonstrate low corrosion of the coatings in pH 4-12 range. Significant dissolution is observed at pH < 4.0, where the alloys dissolve with a higher rate than Zn. The corrosion performance is related to dissolution of the corrosion protective film and the lower hydrogen overvoltage on the alloys than that on Zn. After corrosion of Zn-10.4%Cr the phase composition retains as the parameter (a) of Γ-(Zn,Cr) phase does not change, whereas the parameter (с) of δ-(Zn,Cr) phase decreases.
Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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