Effect of Micro-Arc Oxidation Coatings Formed at Different Voltages on the In Situ Growth of Layered Double Hydroxides and Their Corrosion Protection

被引：80

作者：

Zhang, Gen ^{[1
]}

Wu, Liang ^{[1
,2
]}

Tang, Aitao ^{[1
,2
]}

Pan, Huiling ^{[1
]}

Ma, Yanlong ^{[3
]}

Zhan, Qin ^{[4
]}

Tan, Qiyang ^{[5
]}

Pan, Fusheng ^{[1
,2
]}

Atrens, Andrej ^{[5
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China

[2] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China

[3] Chongqing Univ Technol, Coll Mat Sci & Engn, Chongqing 400054, Peoples R China

[4] China Inst Atom Energy, Beijing 102413, Peoples R China

[5] Univ Queensland, Sch Mech & Min Engn, Brisbane, Qld 4072, Australia

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2018年 / 165卷 / 07期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

PLASMA ELECTROLYTIC OXIDATION; MG-AL ALLOYS; MAGNESIUM ALLOY; PEO COATINGS; ANODIZED ALUMINUM; HYDROTALCITE FILM; SEALING TREATMENT; PHYTIC ACID; LI ALLOY; RESISTANCE;

D O I：

10.1149/2.0531807jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In the present work, for the first time micro-arc oxidation (MAO) coatings were produced at different voltages on the magnesium alloy AZ31, leading to the formation ofMAO coatings with different properties (e.g. composition, structure and morphology). Then, we studied MgAl layered double hydroxides (LDHs) grown in-situ on MAO coatings. The properties of final composite coatings were largely determined by the dissolution of the MAO coating, and the final composite coatings significantly increased in thickness with the thickest one being 18.0 mu m. The corrosion protection was investigated using EIS, hydrogen evolution tests and immersion tests. Due to a synergistic effect of LDHs and spinel, MAO coating formed at the highest production voltage, modified with LDHs, provided the better corrosion protection. (c) 2018 The Electrochemical Society.

引用

页码：C317 / C327

页数：11

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