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
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3～6 μm的早期点蚀。
表面粗糙度
显微显色法
点蚀
304 stainless steel
surface roughness
microscopic chromogenic method
pitting corrosion
Abstract
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 three-dimensional video microscopy technique.
中图分类号 TG172 DOI 10.11973/fsyfh-201610012
所属栏目 试验研究
基金项目 佛山市科技计划项目(2014AG10009); 佛山市高明区产学研项目(201205)
收稿日期 2015/10/9
修改稿日期
网络出版日期
作者单位点击查看
备注王梅丰(1972-), 副教授, 博士, 从事材料表面与应用电化学研究,
引用该论文: WAN Bin,WANG Mei-feng,CHEN Dong-chu,WEI Hong-yang,LIU Gui-hong,LI Guang-dong. Early Pitting Detection of 304 Stainless Steel by Microscopic Chromogenic Method Combined with Three-Dimensional Video Microscopy Technique[J]. Corrosion & Protection, 2016, 37(10): 838
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参考文献
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【10】JONES K,HOEPPNER D. The interaction between pitting corrosion,grain boundaries,and constituent particles during corrosion fatigue of 7075-T6 aluminum alloy[J]. International Journal of Fatigue,2009,31(4): 686-692.
【11】WRANGLEN G. Pitting and sulphide inclusions in steel[J]. Corrosion Science,1974,14(5): 331-349.
【12】陈学群,常万顺,陈德斌. 碳钢中夹杂物诱发点蚀的规律和特性研究[J]. 海军工程大学学报,2004,16(6): 30-36.
【13】WANG M F,LI X G,DU N,et al. Direct evidence of initial pitting corrosion[J]. Electrochemistry Communications,2008,10(7): 1000-1004.
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