汽车用不锈钢晶间腐蚀机理与对策  

Mechanism of Intercrystalline Corrosion and Countermeasure for Automobile Stainless Steel

作　　者：孙智富[1,2,3] 詹捷[1] 张叶成[4] 孙健[3] 李司山[5] 

机构地区：[1]重庆理工大学汽车零部件制造及检测技术教育部重点实验室,重庆400050 [2]武汉理工大学材料科学与工程学院,武汉430070 [3]重庆机电职业技术学院,重庆400050 [4]首钢迁钢公司,迁安064404 [5]重庆理工大学材料科学与工程学院,重庆400050

出　　处：《武汉理工大学学报》2009年第15期37-40,共4页Journal of Wuhan University of Technology

基　　金：重庆市科技攻关重大项目(CSTC2005AA3012-1)

摘　　要：对汽车常用铁素体及奥氏体不锈钢制件在使用过程中产生的晶间腐蚀机理进行了研究。利用SEM、EDS等方法对晶间腐蚀的组织形貌进行了观察,并利用M273恒电位仪对不锈钢制件进行了电极电位测试。研究指出:零件的制造工艺和使用工况、塑性变形、热处理、焊接及使用时温度、振动、应力和腐蚀介质等综合作用,使材料的局部出现贫Cr而导致晶间腐蚀破坏,并提出了防止晶间腐蚀的对策。The mechanism of intercrystalline corrosion for automobile ferritic and austenitic stainless steels during service process was studied. The structure of intercrystalline corrosion are investigated by modem material analysis means such as SEM and EDS etc, and the electrode potential of stainless steel parts was tested using the M273 potentiostat. The researches showed that poor Cr being synthetically aroused by working condition, temperature, vibration, stress and corrosion medium etc, was the main factor leading to intercrystalline corrosion. And countermeasures for solving the problem were proposed as well.

关 键 词：不锈钢 晶间腐蚀 

分 类 号：TG113.23[金属学及工艺—物理冶金]