Effect of alternating voltage treatment on the microstructure and corrosion resistance of stannate conversion coating on AZ91D alloy

被引：28

作者：

Liu, Xiaolan ^{[1
]}

Zhang, Tao ^{[1
,2
]}

Shao, Yawei ^{[1
,2
]}

Meng, Guozhe ^{[1
,2
]}

Wang, Fuhui ^{[1
,2
]}

机构：

[1] Harbin Engn Univ, Corros & Protect Lab, Minis Educ, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Peoples R China

[2] Chinese Acad Sci, State Key Lab Corros & Protect, Inst Met Res, Shenyang 110016, Peoples R China

来源：

CORROSION SCIENCE | 2009年 / 51卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Magnesium; TEM; SEM; EIS; Pitting corrosion; AZ31 MAGNESIUM ALLOY; SURFACE PRETREATMENT; FORMATION MECHANISM; FILM; PASSIVATION; CERIUM; IMPROVEMENT; PROTECTION; GROWTH;

D O I：

10.1016/j.corsci.2009.07.009

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

A new stannate conversion coating (CC) on AZ91D alloy was synthesized by the application of alternative voltage (AV) treatment technique. By using AV technique, the formation process of CC can be controlled. SEM results indicated that a continuous and compact dual-layer CC was formed on alloy surface after AV treatment. TEM results revealed that the inner layer consists of magnesium-aluminum-stannum nanocrystals and amorphous, meanwhile, the outer layer is primarily a mixture of magnesium-stannum hydroxides and oxides with amorphous structure. The electrochemical experimental results revealed that AV treatment significantly improved the corrosion resistance of CC, which attributed to the distinguishing microstructure of AV-CC. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2685 / 2693

页数：9

共 39 条

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