Structure and corrosion behavior of oxide layer with Zr compounds on AZ31 Mg alloy processed by two-step plasma electrolytic oxidation

被引：34

作者：

Einkhah, Feryar ^{[1
]}

Lee, Kang Min ^{[2
]}

Sani, Mohammad Ali Faghihi ^{[1
]}

Yoo, Bongyoung ^{[2
]}

Shin, Dong Hyuk ^{[2
]}

机构：

[1] Sharif Univ Technol, Dept Mat Sci & Engn, Tehran 1458889694, Iran

[2] Hanyang Univ, Dept Met & Mat Engn, Ansan 426791, South Korea

来源：

SURFACE & COATINGS TECHNOLOGY | 2014年 / 238卷

基金：

新加坡国家研究基金会;

关键词：

Magnesium alloy; Plasma electrolytic oxidation; Zr compounds; Corrosion; AZ91D MAGNESIUM ALLOY; PEO COATINGS; ALUMINUM-ALLOY; RESISTANCE; MICROSTRUCTURE; ADDITIVES; SURFACE; FILMS;

D O I：

10.1016/j.surfcoat.2013.10.042

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The formation of the oxide layer with Zr compounds on AZ31 Mg alloy processed by two-step plasma electrolytic oxidation (PEO) has been investigated. After the PEO process first in an alkaline phosphate electrolyte and second in an acid electrolyte containing K2ZrF6, the microstructure, chemical composition, and phase composition of the oxide layers were analyzed via SEM, EDS, and XRD, respectively. The electrochemical reaction and the high temperature caused by the plasma discharges in the electrolyte were the main factors leading to the fabrication of an oxide layer containing Zr compounds on AZ31 Mg alloy. The micro-pores were filled with ZrO2 formed during the PEO process. The results of a potentiodynamic polarization test clearly indicated that the corrosion properties of AZ31 Mg alloy were significantly improved by the two-step PEO process. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：75 / 79

页数：5

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