材料期刊网

通过腐蚀失重试验,获得了316NG不锈钢在高纯水环境中的腐蚀失重曲线及均匀腐蚀速率;采用XPS、XRD、SEM等手段对腐蚀产物的组成元素、物相、形貌进行了分析.结果表明:316NG不锈钢在高纯水环境中的平均腐蚀速率为0.05 mm/a,远小于304NG不锈钢和321不锈钢的;腐蚀产物膜主要以耐蚀性强的磁铁矿Fe3O4、尖晶石类氧化物FeCr2O4和NiFe2O4、镍和铬氧化物及氢氧化物等形式存在,且(铬十镍)与铁的原子比高于基体的,说明316NG不锈钢具有良好的耐腐蚀性能.

The corrosion behavior of 316NG stainless steel in high pure water environment was studied.The kinetic curve and corrosion rate of 316NG stainless steel were obtained by corrosion weight-loss test.The elements,phases and microscopic morphology of corrosion products were analyzed by the method of XPS,XRD and SEM.The results show that the corrosion rate of 316NG stainless steel in high pure water environment was 0.05 mm/a,which was lower than that of 304NG and 321 stainless steels.The corrosion products consisted of magnetite Fe3O4 with good corrosion resistance,spinel oxide FeCr2O4 and NiFe2O4,Ni oxide and hydroxide,Cr oxide and hydroxide.The atomic ratio of Ni+Cr to Fe in corrosion products was higher than that in base metal.The results show that 316NG stainless steel had good corrosion resistance.