Comparison of the corrosion behaviour in 5% NaCl solution of Mg alloys NZ30K and AZ91D

被引：73

作者：

Chang, J. W. ^{[1
]}

Peng, L. M. ^{[1
]}

Guo, X. W. ^{[1
]}

Atrens, A. ^{[2
,3
]}

Fu, P. H. ^{[1
]}

Ding, W. J. ^{[1
]}

Wang, X. S. ^{[4
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Natl Engn Res Ctr Light Alloys Net Forming, Shanghai 200030, Peoples R China

[2] Univ Queensland, Brisbane, Qld 4072, Australia

[3] Swiss Fed Labs Mat Sci & Technol, EMPA, CH-8600 Dubendorf, Switzerland

[4] Tsing Hua Univ, Sch Aerosp, Beijing 100084, Peoples R China

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2008年 / 38卷 / 02期

基金：

中国国家自然科学基金;

关键词：

AZ91D; corrosion behaviour; cyclic polarization; Mg-Nd-Zn-Zr alloy;

D O I：

10.1007/s10800-007-9426-x

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 [应用化学];

摘要：

The corrosion behaviour of AZ91D and NZ30K (Mg-3Nd-0.2Zn-0.4Zr) alloys was investigated in 5% NaCl solution by immersion tests and electrochemical measurements. The immersion tests showed that the corrosion rate of NZ30K was about half that of AZ91D. The localized corrosion of AZ91D was more severe than that of NZ30K due to the higher cathode-to-anode area ratio and higher difference in potential of the cathode phase and the anode matrix. The corrosion of AZ91D concentrated on certain areas and resulted in much deeper corrosion pits, whilst that of NZ30K spread across the surface and led to more uniform and shallow corroded areas. The corrosion products of NZ30K were more compact than those of AZ91D as indicated by SEM. The cyclic polarization curves showed that NZ30K had higher pitting corrosion resistance than AZ91D.

引用

页码：207 / 214

页数：8

共 35 条

[1]

Evaluation of microstructural effects on corrosion behaviour of AZ91D magnesium alloy [J].