预应变和敏化顺序对304不锈钢晶间腐蚀敏感性的影响  

Effects of Prestrain and Sensitization Order on 304 Stainless Steel's Intergranular Corrosion Susceptibility

作　　者：薛天然 刘浩[2] XUE Tian-ran LIU Hao(Shanghai Jian＇ an Chemical Engineering Co. , Ltd. College of Mechanical and Power Engineering, Nanfing University of Technology)

机构地区：[1]上海建安化工设计有限公司 [2]南京工业大学机械与动力工程学院

出　　处：《化工机械》2017年第1期17-21,25,共6页Chemical Engineering & Machinery

摘　　要：预应变和敏化处理均对304不锈钢晶间腐蚀敏感性有显著的影响,但是两者的先后处理顺序是否对304不锈钢存在影响还有待讨论。利用硫酸-硫酸铜腐蚀试验方法和双环电化学动电位再活化法(DL-EPR),对304不锈钢预应变和敏化处理后的晶间腐蚀敏感性进行试验研究。采用金相显微镜对硫酸-硫酸铜试验后的试样进行微观组织观察,并利用动电位再活化法进行试样敏化度(DOS)的测量。研究结果表明,在预应变程度和敏化温度时间相同的情况下,先预应变后敏化处理的304不锈钢晶间腐蚀敏感性低于先敏化处理后预应变的试样。Both prestrain and sensitization treatment influences 304 stainless steel＇ s intergranular corrosion susceptibility obviously. Having the copper sulfate-sulfuric acid test method and the double-loop electrochemical potentiokinetic reactivation （DL-EPR） method adopted to investigate the susceptibility to intergranular corrosion was conducted, in which, having metallurgical microscope adopted to observe the specimens tested with the copper sulfate-sulfuric acid test method and having the specimens measured with DL-EPR were implemented to show that, when both prestrain degree and sensitization temperature time keeps consistent, the specimen＇ s intergranular corrosion susceptibility which receives prestrain before sensitization treatment is lower than that adopts sensitization treatment before prestrain.

关 键 词：304不锈钢 预应变 敏化处理 晶间腐蚀 动电位再活化法 

分 类 号：TQ050.41[化学工程]