A homogenisation pre-treatment for adherent and corrosion-resistant Ni electroplated coatings on Mg-alloy AZ91D

被引：58

作者：

Yang, Haiyan ^{[1
,2
]}

Guo, Xingwu ^{[2
]}

Chen, Xiaobo ^{[3
]}

Birbilis, Nick ^{[3
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China

[3] Monash Univ, Dept Mat Engn, Clayton, Vic 3800, Australia

来源：

CORROSION SCIENCE | 2014年 / 79卷

关键词：

Magnesium; Metal coatings; Zinc; Nickel; Polarisation; Electrodeposited films; PROTECTIVE COPPER/NICKEL DEPOSIT; MAGNESIUM ALLOY; ELECTROLESS NICKEL; ZINC IMMERSION; ELECTRODEPOSITION; AZ31; COPPER; SUBSTRATE; OXIDATION; FLUORIDE;

D O I：

10.1016/j.corsci.2013.10.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Multi-step Ni electroplatings were applied to AZ91D following the development of a homogenisation pretreatment. The Ni coating was well adhered, as verified by thermal shock testing, and provided corrosion protection in 3.5 wt.% NaCl for 74 h at a coating thickness of similar to 15 mu m. Being a cathodic coating, further protection in the presence of defects was not demonstrated herein, however realisation of quality Ni coatings on Mg is technologically important. To this end, achieving microstructural homogeneity on AZ91D is critical prior to plating or coating (such as electroless plating and chemical conversion coating) multi phase Mg-alloys. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：41 / 49

页数：9

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