Corrosion behaviour of electrodeposited Zn-Cr alloy coatings

被引：24
|
作者：
Chakarova, V. [1 ]
Boiadjieva-Scherzer, Tz. [2 ]
Kovacheva, D. [3 ]
Kronberger, H. [4 ]
Monev, M. [1 ]
机构：
[1] Bulgarian Acad Sci, Inst Phys Chem, Acad G Bonchev Str,BL11, BU-1113 Sofia, Bulgaria
[2] Ctr Electrochem Surface Technol GmbH, Viktor Kaplan Str 2, A-2700 Wiener Neustadt, Austria
[3] Bulgarian Acad Sci, Inst Gen & Inorgan Chem, Acad G Bonchev Str,BL11, BU-1113 Sofia, Bulgaria
[4] TU Vienna, Inst Chem Technol & Analyt, Getreidemarkt 9-164Ec, A-1060 Vienna, Austria
来源：
CORROSION SCIENCE | 2018年 / 140卷
关键词：
Electrodeposited Zn-Cr alloy; AAA; SEM; XRD; Corrosion; Anodic dissolution;
D O I：
10.1016/j.corsci.2018.06.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 Gamma-(Zn,Cr) phase does not change, whereas the parameter (c) of delta-(Zn,Cr) phase decreases.
引用
收藏
页码：73 / 78
页数：6
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