Effect of calcium oxide on the corrosion behaviour of AZ91 magnesium alloy

被引：60
|
作者：
Nam, N. D. [1 ]
Bian, M. Z. [3 ]
Forsyth, M. [4 ]
Seter, M. [1 ]
Tan, M. [1 ,2 ]
Shin, K. S. [3 ]
机构：
[1] Deakin Univ, Inst Frontier Mat, Geelong, Vic 3220, Australia
[2] Deakin Univ, Fac Sci & Technol, Sch Engn, Geelong, Vic 3220, Australia
[3] Seoul Natl Univ, Sch Mat Sci & Engn, Magnesium Technol Innovat Ctr, Seoul 151744, South Korea
[4] Deakin Univ, Inst Frontier Mat, Burwood Hwy, Vic 3125, Australia
来源：
CORROSION SCIENCE | 2012年 / 64卷
关键词：
Magnesium; EIS; Polarization; Passive film; Alkaline corrosion; Pitting corrosion; MECHANICAL-PROPERTIES; ELECTROCHEMICAL-BEHAVIOR; OPEN-CIRCUIT; MG; MICROSTRUCTURE; CHLORIDE; CAO; RESISTANCE; OXIDATION; ADDITIONS;
D O I：
10.1016/j.corsci.2012.07.026
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Three types of AZ91 magnesium alloy with various weight percentages of calcium oxide ranging from 0 to 0.6 wt.% are examined using electrochemical techniques and surface analyses. The results show that AZ91 magnesium alloy has improved corrosion resistance with increasing calcium oxide content due to higher pitting potential and charge transfer resistance. In addition, the benefits of calcium oxide addition are the refinement of the precipitates and increased the formation of a more protective surface film in mixed Mg-Al-Zn-Ca oxides, resulting of the extra resistance between the a-Mg matrix and the second phase. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：263 / 271
页数：9
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