显微显色法结合三维视频显微镜技术检测304不锈钢的早期点蚀  

Early Pitting Detection of 304 Stainless Steel by Microscopic Chromogenic Method Combined with Three-Dimensional Video Microscopy Technique

作　　者：万斌 王梅丰[2] 陈东初[3] 魏红阳[2] 刘桂宏[2] 李光东[2] 

机构地区：[1]上海民航职业技术学院,上海200232 [2]南昌航空大学材料科学与工程学院,南昌330063 [3]佛山科学技术学院理学院,佛山528137

出　　处：《腐蚀与防护》2016年第10期838-841,846,共5页Corrosion & Protection

基　　金：佛山市科技计划项目(2014AG10009);佛山市高明区产学研项目(201205)

摘　　要：采用显微显色法对不同表面粗糙度的304不锈钢在3.0%、2.0%、1.0%、0.5%（质量分数）NaCl溶液与纯水中的点蚀行为进行全场原位检测,并采用三维视频显微镜技术对不锈钢早期点蚀坑进行分析。结果表明：随腐蚀介质中NaCl含量及304不锈钢表面粗糙度的降低,点蚀诱导时间延长,所形成的点蚀坑减少且分布稀疏;显微显色法结合三维视频显微镜技术可以检测直径为3～6μm的早期点蚀。Pitting corrosion behavior of 304 stainless steel with different surface roughness in 3.0%,2.0%,1.0%,0.5%（mass fraction）NaCl solutions and pure water were in-situ and whole field monitored with microscopic chromogenic method.And the early pits in the stainless steel were analyzed using three-dimensional video microscopy technique.The results show that with the reduction of NaCl concentration in corrosion medium and surface roughness of stainless steel,the pitting induction time increased,and the pits decreased in number and distributed sparsely.Early pits in diameter of 3-6 μm can be detected by microscopic chromogenic method combined with threedimensional video microscopy technique.

关 键 词：304不锈钢 表面粗糙度 显微显色法 点蚀 

分 类 号：TG172[金属学及工艺—金属表面处理]