ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 16    Special 3    December 2006

[PDF]    
Corrosion and electrochemical behavior of AZ31D magnesium alloys in sodium chloride
单大勇1,韩恩厚1,柯伟1,周婉秋2,周婉秋3
(1.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2.辽宁省沈阳市科学院金属研究所
3.北京市北京化工大学材料科学与工程学院
)
Abstract: The corrosion and electrochemical behavior of extruded AZ31D magnesium alloys in NaCl solution were investigated using SEM, XRD and electrochemical method. It is found that AZ31D is susceptive to Cl- ion, and the open circuit potential shifts to more negative values with increasing chloride concentration. Pitting occurs at corrosion potential and corrosion area enlarges with enhanced polarization. Tafel slopes of the cathode branches in different testing solution are almost the same. Cl- concentration affects cathode course slightly. High frequency capacitive loops shrink with the increase of Cl- concentration. Corrosion initiates from the grain boundary and spreads to entire surface with time.
Key words: AZ31D magnesium alloys; corrosion behavior; chloride ion
Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
Managed by Central South University (CSU) 湘ICP备09001153号-9