316L不锈钢表面纳米化后腐蚀性能研究  

Study on Corrosion Property of 316L Stainless Steel with Nanocrystalline Surface

作　　者：石继红[1] 武保林[1] 刘刚[2] 

机构地区：[1]沈阳航空工业学院,沈阳110034 [2]中国科学院金属研究所,沈阳110016

出　　处：《材料工程》2005年第10期42-46,共5页Journal of Materials Engineering

基　　金：辽宁省自然科学基金项目(2001102004);国家自然科学基金项目(50071016)

摘　　要：对表面纳米化和未经表面纳米化处理的316L不锈钢的样品分别进行点蚀实验和应力腐蚀对比实验,在3.5%(质量分数)NaCl水溶液中分别测出它们的极化曲线。结果表明,316L不锈钢表面纳米化后抗点蚀性能下降,抗应力腐蚀性能提高。对应力腐蚀断口的SEM分析发现,316L不锈钢应力腐蚀断口有明显分区现象,断裂形式为韧性断裂,开裂通道既有穿晶型也有沿晶型。Pitting corrosion and stress corrosion tests have been carried out to the specimens of 316L stainless steel with nanocrystalline surface and non-nanocrystalline surface. Their polarization curves also have been measured in a 3.5 % （mass fraction） NaCl solution. The results show that pitting resistance of 316L stainless steel with nanocrystalline surface is reduced but the stress corrosion resistance is improved. The stress corrosion cracked surfaces of the specimens have been observed with SEM. It is found that the cracked surface of the 316L stainless steels has obviously zoned. The cracking shows a ductile fracture. The cracking path is both of intragranular and intergranular characteristic.

关 键 词：316L不锈钢 表面纳米化 点蚀 应力腐蚀 断口 

分 类 号：TG142.71[一般工业技术—材料科学与工程]