Corrosion of ultra-high-purity Mg in 3.5% NaCl solution saturated with Mg(OH)2

被引：273
|
作者：
Cao, Fuyong [1 ]
Shi, Zhiming [1 ]
Hofstetter, Joelle [2 ]
Uggowitzer, Peter J. [2 ]
Song, Guangling [3 ]
Liu, Ming [4 ]
Atrens, Andrej [1 ]
机构：
[1] Univ Queensland, Div Mat, St Lucia, Qld 4072, Australia
[2] Swiss Fed Inst Technol, Dept Mat, CH-8093 Zurich, Switzerland
[3] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
[4] GM China Sci Lab, Shanghai 201206, Peoples R China
来源：
CORROSION SCIENCE | 2013年 / 75卷
基金：
澳大利亚研究理事会;
关键词：
Magnesium; Weight loss; SEM; BIODEGRADABLE MAGNESIUM IMPLANTS; ANODIC POLARIZATION CURVES; SODIUM-CHLORIDE SOLUTION; PURE MAGNESIUM; GALVANIC CORROSION; SULFATE-SOLUTIONS; DIFFUSION COEFFICIENTS; AQUEOUS-SOLUTION; CRACKING SCC; AL ALLOYS;
D O I：
10.1016/j.corsci.2013.05.018
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Corrosion was evaluated for ultra-high-purity magnesium (Mg) immersed in 3.5% NaCl solution saturated with Mg(OH)(2). The intrinsic corrosion rate measured with weight loss, P-W = 0.25 +/- 0.07 mm y(-1), was slightly smaller than that for high-purity Mg. Some specimens had somewhat higher corrosion rates attributed to localised corrosion. The average corrosion rate measured from hydrogen evolution, P-AH, was lower than that measured with weight loss, P-W, attributed to dissolution of some hydrogen in the Mg specimen. The amount of dissolution under electrochemical control was a small amount of the total dissolution. A new hydride dissolution mechanism is suggested. (c) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：78 / 99
页数：22
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