Corrosion resistance of electroplated<BR>Zn-Co alloy coating

ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 12 No. 1 February 2002

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Corrosion resistance of electroplated
Zn-Co alloy coating

AN Mao-zhong(安茂忠),YANG Zhe-long(杨哲龙),ZHANG Jing-shuang(张景双),
LI Wen-liang(李文良)，TU Zhen-mi(屠振密)

(Department of Applied Chemistry,Harbin Institute of Technology,
Harbin 150001,China)

Abstract: By the NSS test and the test in SO₂ gas atmosphere and detecting the φ_corr—t curves,R_p—t curves and the cyclic voltammogram curves,the corrosion resistance of the electroplated Zn-Co alloy coating was studied.The corrosion resistance of the electroplated Zn-Co alloy coating is three times higher than that of the galvanized coating. Because the corrosion resistance of the Zn-Co alloy coating is especially remarkable in SO₂ gas atmosphere,it is particularly fit to be used as a protective coating in industrial atmosphere.The reason why the Zn-Co alloy coating has such a high corrosion resistance is that its corrosive product has a comparatively great role in depressing the corrosive process.

Key words: electroplating; Zn-Co alloy; corrosion resistance

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