烟尘对409不锈钢腐蚀行为的影响  

Effect of Soot on Corrosion Behavior of 409 Stainless Steel

作　　者：陈聪聪[1] 杨勇 张程[1] 毕洪运[2] 李谋成[1] 

机构地区：[1]上海大学材料研究所,上海200072 [2]宝山钢铁股份有限公司研究院,上海201900

出　　处：《中国腐蚀与防护学报》2017年第5期467-472,共6页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(51134010和U1660205);上海市科学技术委员会支撑项目(15XD1520100)~~

摘　　要：采用氧化-浸泡-蒸发循环实验与电化学阻抗谱、XRD、SEM、腐蚀坑深度和腐蚀失重等测量方法,研究了汽车消声器环境中409不锈钢在烟尘作用下的腐蚀行为。结果表明,有/无烟尘作用条件下,试样表面形成的腐蚀产物相似,但烟尘会使试样的腐蚀电位略升高,并且腐蚀坑深度和腐蚀失重增加,这主要是因为烟尘与409不锈钢间具有一定的电偶腐蚀效应,减小了腐蚀体系的电荷转移电阻,从而加剧了409不锈钢在冷凝液中的腐蚀。The influence of soot on the corrosion behavior of 409 stainless steel for automotive muffler was studied by means of oxidation-immersion-evaporation cycle test with electrochemical impedance spectroscopy,XRD,SEM as well as pitting depth-and corrosion weight loss-measurement.The results show that the corrosion products formed on the sample surfaces are similar in the condensate liquids with and without soot.However,the corrosion potential increases lightly and both the pitting depth and weight loss become higher for the steel in the presence of soot.These can be attributed mainly to the galvanic effect between deposited soot and the stainless steel,which reduces the charge transfer resistance of the corrosion system and accelerates the corrosion of 409 stainless steel in the condensate solution.

关 键 词：烟尘 汽车排气系统 腐蚀 不锈钢 

分 类 号：TG172[金属学及工艺—金属表面处理]