Corrosion behavior of AZ31 magnesium alloy in simulated acid rain solution

• Published in: Transactions of Nonferrous Metals Society of China Vol. 20; no. B07; pp. 638 - 642
• Main Author: 刘锋 宋影伟 单大勇 韩恩厚
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.07.2010; State Key Laboratory for Corrosion and Protection,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China
• Subjects: Acid rain; AlMn phase; AZ31 magnesium alloy; AZ31镁合金; Cl − ion; Corrosion; Corrosion mechanisms; Corrosion rate; Magnesium base alloys; Pitting (corrosion); simulated acid rain solution; Simulation; Synthetic aperture radar; 模拟酸雨; 氯离子浓度; 汽车零部件; 电化学测试; 腐蚀机制; 腐蚀行为; AZ31 magnesium alloy; Cl − ion; AlMn phase; simulated acid rain solution; Cl- ion
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(10)60553-5

The corrosion mechanism of AZ31 magnesium alloy used as automobile components and the influence of the concentration of Cl^- ion in simulated acid rain（SAR）were studied by electrochemical tests and SEM.The results show that pitting corrosion happens around the AlMn phases locating at the grain boundary.The corrosion of AZ31 magnesium alloy in SAR is controlled by the rate of anodic dissolution and hydrogen evolution,and the corrosion rate of AZ31 increases with increasing concentration of Cl^- ion.However,the Cl^- ion in SAR is not the main influencing factor inducing the pitting corrosion.