Assessing the Corrosion of Commercially Pure Magnesium and Commercial AZ31B by Electrochemical Impedance, Mass-Loss, Hydrogen Collection, and Inductively Coupled Plasma Optical Emission Spectrometry Solution Analysis

被引:98
作者
Bland, L. G. [1 ]
King, A. D. [1 ]
Birbilis, N. [2 ]
Scully, J. R. [1 ]
机构
[1] Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA
[2] Monash Univ, Dept Mat Engn, Clayton, Vic 3800, Australia
关键词
corrosion rate; EIS; hydrogen evolution; ICP-OES; magnesium; monitoring; polarization; Tafel extrapolation; LOCALIZED CORROSION; DIE-CAST; SURFACE-FILM; MG; BEHAVIOR; ALLOYS; AZ91; CHLORIDE; MICROSTRUCTURE; RESISTANCE;
D O I
10.5006/1419
中图分类号
T [工业技术];
学科分类号
120111 [工业工程];
摘要
The corrosion of commercially pure magnesium (Mg) and AZ31B-H24 with simultaneous measurements of electrochemical impedance (EIS) and hydrogen gas evolved over a 24 h immersion period was studied in solutions of three chloride concentrations. The corrosion rate was determined from the Stern-Geary approach. The integral electrochemical-based mass loss was compared to the gravimetric mass loss and inductively coupled plasma optical emission spectrometry (ICP-OES) solution analysis of the total Mg concentration released. The use of ICP-OES to support the other assessment methods has not been previously reported. Assuming Mg dissolves as Mg2+, there was agreement using these four unique measures of Mg corrosion. The integration of the polarization resistance (R-P) over time, as evaluated from EIS at the low frequency limit incorporating full consideration of the pseudo-inductive impedance behavior of Mg, provided excellent correlation to the cumulative mass loss, ICP-OES solution analysis, and volume of hydrogen collected for commercially pure Mg and reported for the first time for AZ31. The choice of using the Tafel slope in the Stern-Geary approach, as well as the subsequent comparison of results to corrosion rate data in the literature, are discussed.
引用
收藏
页码:128 / 145
页数:18
相关论文
共 102 条
[1]
Corrosion behaviour of Mg-Cu and Mg-Mo composites in 3.5% NaCl [J].
Abhijeet, Budruk S. ;
Balasubramaniam, R. ;
Gupta, M. .
CORROSION SCIENCE, 2008, 50 (09) :2423-2428
[2]
[Anonymous], G1 ASTM INT
[3]
[Anonymous], 2010, G106 ASTM INT
[4]
[Anonymous], 2013, B843 ASTM INT
[5]
[Anonymous], 2013, G97 ASTM INT
[6]
Advances in Mg corrosion and research suggestions [J].
Atrens, Andrej ;
Song, Guang-Ling ;
Cao, Fuyong ;
Shi, Zhiming ;
Bowen, Patrick K. .
JOURNAL OF MAGNESIUM AND ALLOYS, 2013, 1 (03) :177-200
[7]
Effect of grain size and twins on corrosion behaviour of AZ31B magnesium alloy [J].
Aung, Naing Naing ;
Zhou, Wei .
CORROSION SCIENCE, 2010, 52 (02) :589-594
[8]
About some corrosion mechanisms of AZ91D magnesium alloy [J].
Ballerini, G ;
Bardi, U ;
Bignucolo, R ;
Ceraolo, G .
CORROSION SCIENCE, 2005, 47 (09) :2173-2184
[9]
Local electrochemical impedance spectroscopy applied to the corrosion behavior of an AZ91 magnesium alloy [J].
Baril, G ;
Blanc, C ;
Keddam, M ;
Pébère, N .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (10) :B488-B493
[10]
The corrosion of pure magnesium in aerated and deaerated sodium sulphate solutions [J].
Baril, G ;
Pébère, N .
CORROSION SCIENCE, 2001, 43 (03) :471-484