Improved surface morphology and corrosion resistance for galvannealed coatings by pre-electroplating iron

被引：22

作者：

Choi, Yun-Il ^{[2
]}

Shin, Eui-Sub ^{[3
]}

Kuroda, Kensuke ^{[2
]}

Okido, Masazumi ^{[2
]}

Park, Chan-Jin ^{[1
]}

机构：

[1] Chonnam Natl Univ, Dept Mat Sci & Engn, Gwangiu 500757, South Korea

[2] Nagoya Univ, Grad Sch Engn, Dept Mat Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[3] Nagoya Univ, Grad Sch Engn, Dept Crystalline Mat Sci, Chikusa Ku, Nagoya, Aichi 4648603, Japan

来源：

CORROSION SCIENCE | 2012年 / 58卷

关键词：

Metal coatings; Zinc; Electrodeposited films; Passivity; DUAL-PHASE STEEL; FE; LAYER; SI;

D O I：

10.1016/j.corsci.2012.01.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dual-phase steel was electroplated with Fe prior to reduction annealing to improve surface quality and corrosion characteristics after galvannealing. This pre-electroplating process caused remarkable reduction in surface cracks and induced delta-phase formation over the surface of the galvannealed coating. Moreover, the degree of Fe-Zn alloying significantly increased, resulting in a thicker coating. Consequently, the corrosion potential increased and corrosion current decreased in the highly polarized anodic reaction. Further, spontaneous passivation occurred, resulting in a very low corrosion rate. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：152 / 158

页数：7

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