Corrosion performance of plasma electrolytic oxidized AZ31 magnesium alloy in silicate solutions with different additives

被引：67

作者：

Chen, Huan ^{[1
]}

Lv, GuoHua ^{[1
]}

Zhang, GuLing ^{[2
]}

Pang, Hua ^{[1
]}

Wang, XingQuan ^{[3
]}

Lee, HeonJu ^{[4
]}

Yang, SiZe ^{[1
,5
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[2] Cent Univ Nationalities, Coll Sci, Beijing 100081, Peoples R China

[3] Changchun Univ Sci & Technol, Coll Sci, Changchun 130022, Jilin, Peoples R China

[4] Cheju Natl Univ, Fac Mech & Energy Syst Engn, Cheju 690756, South Korea

[5] Xiamen Univ, Sch Phys & Mech & Elect Engn, Fujian Key Lab Plasma & Magnet Resonance, Xiamen 363105, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2010年 / 205卷

基金：

中国国家自然科学基金;

关键词：

Plasma electrolytic oxidation; AZ31 Magnesium alloy; Silicate; Phosphate; Fluoride; Corrosion resistance; MICRO-ARC OXIDATION; COATINGS; AZ91D; RESISTANCE; FLUORIDE; GROWTH;

D O I：

10.1016/j.surfcoat.2010.03.032

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this work, plasma electrolytic oxidation coatings were produced on AZ31 magnesium alloy. The electrolytes used were mainly composed of silicate, silicate with addition of phosphate or fluoride, respectively. Scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, X-ray diffraction (XRD), and potentiodynamic polarization tests were carried out to investigate the microstructure, element composition, phase composition and corrosion resistance of the coatings. The results showed that the coating formed in silicate electrolyte was mainly composed of MgO. Mg2SiO4 and had a dense structure and low thickness. After the addition of fluoride, MgF2 was formed and both the coating thickness and corrosion resistance were increased. The addition of phosphate also quickened the film growth rate, but the corrosion resistance of the coating was reduced instead due to the loose and porous microstructure. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.

引用

页码：S32 / S35

页数：4

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