18／8型不锈钢在受力形变条件下腐蚀电化学行为的研究  

Electrochemical Behaviors of the Loaded Stainless Steel in Dilute Thiosulphate Solution

作　　者：林昌健[1] 冯祖德[1] 林福龄[1] 王发扬[1] 谭建光[1] 王元辉[1] 

机构地区：[1]厦门大学化学系,固体表面物理化学国家重点实验室

出　　处：《电化学》1995年第4期439-445,共7页Journal of Electrochemistry

基　　金：国家自然科学基金;固体表面物理化学国家重点实验室开放课题

摘　　要：应用电化学稳态技术、电化学交流阻抗、微区电化学技术及扫描电镜等方法，研究１８／８型不锈钢在Ｎａ＿２Ｓ＿２Ｏ＿３稀溶液中，受外力形变条件下的腐蚀电化学行为．结果表明：力学因素可使表面腐蚀电化学活性增加；表面微裂纹的发生、消失和再钝化的动态过程，同时受电位和拉应力的影响；点腐蚀可优先发生在应力集中位置，点蚀的发展可能诱导不锈钢的应力腐蚀开裂．The electrochemical behavior of l8/8 stainless steel in dilute thiosulphate solutionduring strained loading was studied by various electrochemical techniques and scanning electronmicroscope.It is evidenced that the corrosion activity of stainless steel increased with strained loading.The dynamic process of repassivation ,which may datermine the initiation ,the cease and developmentof the stress corrosion cracking for stainless steel ,was strongly influenced by both electrochemical andloading conditions. Pitting corrosion may locate preferentially on the sites which was suffered mostloading.The propagation of pitting corrosion of stainless steel may induce stress corrosion crakingunder certain conditions.

关 键 词：不锈钢 电化学行为 应力腐蚀开裂 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TG172.9[金属学及工艺—金属材料]