镁合金表面的腐蚀特性及其防护技术_许越.pdf

33 6 Vol. 33, No. 6 2 0 0 1 1 2 JOURNAL OF HARBIN INST ITU TE OF TECHNOLOGY Dec. , 200 1 1, 2 1 1 1 3 许 越 , 陈 湘, 吕祖舜 , 周德瑞 , 赵连城 ( 1. 哈尔滨工业大学 应用化学系, 黑龙江 哈尔滨 1 0001; 2. 北京航空航 大学 材料科学与工程学院, 北京 100083; 3. 哈尔滨工业大学 材料科学与工程学院, 黑龙江 哈尔滨 1 0001) : , , ; , . , . , , . , . ; , , . : ; ; : T G146 : A :2001) 0607 30 Corrosion characteristic and protection technique for Mg alloy 1, 2 1 1 1 3 XU Yue , CHEN Xiang , LU Zushun , ZHOU Derui , ZHAO Liancheng ( 1. Dept. of Applied Chemistry, Harbin Institute of Technology, Harbin 1 0001, China; 2. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China; 3. School of Materials Science and T echnology, Harbin Institute of Technology , Harbin 1 0001, China ) Abstract: Describes the formation process and structure of the oxidation film on the surface of Mg alloy to explain its tendency of corrosion, presents its corrosion mechanism, analyzes its unique negative difference effect from three different view points and using a more reasonable theory as w ell, and introduces some pro tection techniques for the improvement of corrosion resistance in the surface of Mg alloy, including anodic oxidation w hich can provide good corrosion and abrasion resistances, laser aided treatment w hich can be ap plied easily to the local surface for improvement, physical vapor deposition w hich can improve surface anti corrosion, greater degree of crystallinity and better strength, and chemical treatment w here a developed RE conversion coatings w ithout any toxicity can replace the harmful chromate protective film. Key words: Mg alloy; corrosion; protection technique ;