443高铬铁素体不锈钢耐蚀性能评价  

Corrosion Resistance Evaluation of 443 High Chromium Ferrite Stainless Steel

作　　者：任娟红[1] 潘吉祥[2] Ren Juanhong;Pan Jixiang(Iron and Steel Research Institute of Hongxing Iron&Steel Co.Ltd.,Jiuquan Iron and Steel(Group)Corporation;Stainless Steel Plant of Hongxing Iron&Steel Co.Ltd.,Jiuquan Iron and Steel(Group)Corporation,Jiayuguan,Gansu,735100)

机构地区：[1]酒钢集团宏兴股份公司钢铁研究院 [2]酒钢集团宏兴股份公司不锈钢分公司,甘肃嘉峪关735100

出　　处：《酒钢科技》2020年第1期27-32,共6页

摘　　要：通过盐雾试验、电化学试验和应力腐蚀试验,并结合扫描电镜,对比研究了443超纯铁素体不锈钢和304奥氏体不锈钢的耐腐蚀性能。结果表明:碳、氮间隙元素极低的高铬443超纯铁素体不锈钢点腐蚀速率小于304奥氏体不锈钢,具有比304更优异的耐氯离子腐蚀性能;同时,443不锈钢不具有晶间腐蚀敏感性,而304具有严重的晶间腐蚀敏感性;304不锈钢有可能发生应力腐蚀断裂,443不锈钢没有这种危险。可见,443超纯铁素体不锈钢是304奥氏体不锈钢理想的替代材料,可用于电梯、建筑装饰、厨具等众多行业。The corrosion behavior of 443 ultra-pure ferritic stainless steel and 304 austenitic stainless steel has been compared by salt spray test,electrochemical test,stress corrosion test and combined SEM.The result shows the spot corrosion rate of 443 ultra-pure ferritic stainless steel with extremely low carbon and nitrogen gap elements is less than that of 304 austenitic stainless steel.It has better resistance to chloride ion corrosion than 304 stainless steel.At the same time,443 stainless steel does not have intergranular corrosion sensitivity,while 304 stainless steel has serious intergranular corrosion sensitivity;304 stainless steel may have stress corrosion fracture,443 stainless steel does not have this risk.It can be seen that 443 ultra pure ferritic stainless steel is an ideal alternative material for 304 anstenitic stainless steel,which can be used in many industries such as elevator,architectural decoration,kitchenware etc.

关 键 词：443超纯铁素体不锈钢 盐雾腐蚀 电化学试验 应力腐蚀试验 

分 类 号：TG1[金属学及工艺—金属学]