Enhanced corrosion protection of MgO coatings on magnesium alloy deposited by an anodic electrodeposition process

被引：144

作者：

Lei, Ting ^{[1
]}

Ouyang, Chun ^{[1
]}

Tang, Wei ^{[1
]}

Li, Lian-Feng ^{[1
,2
]}

Zhou, Le-Shan ^{[3
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China

[2] Cent S Univ, Xiangya Hosp, Changsha 410008, Hunan, Peoples R China

[3] Cent S Univ, Xiangya Sch Med, Changsha 410013, Hunan, Peoples R China

来源：

CORROSION SCIENCE | 2010年 / 52卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Magnesium; Potentiostatic; Electrodeposited films; Passive films; Oxide coatings; MICROARC OXIDATION; AZ91D; BEHAVIOR; RESISTANCE; FILMS; PERFORMANCE;

D O I：

10.1016/j.corsci.2010.06.028

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

MgO coatings were prepared on magnesium alloy surface by an anodic electrodeposition process in concentrated KOH solution followed by heat treatment in air. The phase composition and microstructure of the as-formed MgO coatings were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The corrosion behavior of the MgO-coated samples was evaluated by electrochemical measurements and immersion tests in Hanks' solution. The results showed that the MgO-coated Mg alloy exhibited a much superior stability and lower corrosion rate, and thus enabled to improve the corrosion resistance, whereas the bare Mg alloy suffered from severely localized corrosion attack. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：3504 / 3508

页数：5

共 27 条

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Evaluation of microstructural effects on corrosion behaviour of AZ91D magnesium alloy [J].