摘要
利用真空冶炼的方法制备了钴质量分数依次为0、0.3%、0.5%的304不锈钢。此304不锈钢经锻造固溶处理后,利用PS-1型恒电位/恒电流仪、CHI660B电化学工作站并结合EPMA-600电子探针、XJP-200金相显微镜,研究了钴元素对锻后固溶态304不锈钢点蚀敏感性的影响。结果表明:随着Co含量的增加,点蚀孕育期变短,点蚀电位减小;Co元素促进了点蚀的形核率及后续的长大;不含Co试样腐蚀产物以铁的氧化物为主,而含Co试样的腐蚀产物则以铁和铬的氧化物为主;Co是一种提高锻造固溶后304不锈钢的点蚀敏感性的元素。
A method for the preparation of the use of vacuum smelting cobalt content are 0, 0.3 %, 0.5 % of the 304 stainless steel. With forging after solution treatment, PS- 1 type potentiostat / galvanostat is used. CHI660 B electrochemical workstation combines EPMA- 600 electron microprobe, XJP- 200 microscope to study the effects of cobalt to pitting susceptibility of 304 stainless steel forging after solid solution.The results show that： with the increase of Co content, pitting incubation is shorter, pitting potential decreases. Co element promotes pitting nucleation rate and subsequent growth. Free Co sample corrosion products mainly include iron oxide, and corrosion products containing Co sample mainly contain iron and chromium oxides. Co is an element to improve pitting susceptibility of 304 stainless steel forging after solid solution.
出处
《山西冶金》
CAS
2015年第1期21-25,共5页
Shanxi Metallurgy
关键词
304不锈钢
钴元素
锻后固溶态
点蚀
after 304 stainless steel
cobalt
forging after solid solution
pitting
