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材料工程  2013, Vol. Issue (8): 65-69    DOI: 10.3969/j.issn.1001-4381.2013.08.011
  测试与表征 本期目录 | 过刊浏览 | 高级检索 |
钝化膜质量对奥氏体不锈钢耐蚀性的影响及显色检测
程从前, 付琴琴, 曹铁山, 赵杰
大连理工大学 材料科学与工程学院, 辽宁 大连 116085
Effect of Passive Film Quality on Corrosion Resistance of Austenitic Stainless Steel and Chromaticity Inspection
CHENG Cong-qian, FU Qin-qin, CAO Tie-shan, ZHAO Jie
School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, Liaoning, China
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摘要 采用电化学阻抗比较空气暴露和化学钝化304奥氏体不锈钢表面钝化膜质量对其耐蚀性的影响,并提出一种结合阴极还原和显色测量的钝化膜质量检测新方法。结果表明:化学钝化304不锈钢表面钝化膜的致密性和耐蚀性均高于空气暴露样品;空气暴露样品表面钝化膜的显色检测值与还原电位相关,当电位低于钝化膜外层富铁氧化物的还原电位时,显色值随还原电位的降低而增大;化学钝化样品的显色检测值均接近于0;结合循环伏安分析可知,化学钝化通过提高钝化膜内层富铬氧化物的致密性来改善不锈钢耐蚀性,基于阴极还原的显色检测可实现钝化膜质量的数值化表征。
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程从前
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曹铁山
赵杰
关键词 奥氏体不锈钢钝化膜电化学腐蚀显色检测阴极还原    
Abstract:Effect of passive film quality on corrosion resistance of 304 austenitic stainless steel after air exposure and chemical passivation was investigated by using electrochemical impedance spectra. A novel inspection of the film quality was proposed based on cathodic reduction and chromaticity inspection. The results show that the compactness of passive film and corrosion resistance for the sample after chemical passivation are superior to that after air exposure. The chromaticity measurement is dependent on the applied potential for the samples after air exposure. The chromaticity measured value increases with decreasing potentials when the applied potential is lower than the reduction potential of outer Fe-rich oxide in passive film. However, the chromaticity for the samples after chemical passivation is close to 0. Based on cyclic voltammetry, it reveals that the chemical passivation improves the corrosion resistance of 304 stainless steel by enhancing the compactness of inner Cr-rich oxide in passive film. Experimental results suggest that the chromaticity inspection could be utilized to numerically characterize the quality of passive film.
Key wordsaustenitic stainless steel    passive film    electrochemical corrosion    chromaticity inspection    cathodic reduction
收稿日期: 2012-03-27      出版日期: 2013-08-20
中图分类号:  TG174  
  TB304  
基金资助:国家重点基础研究发展计划"973"项目资助(2009CB24305);国家自然科学基金资助项目(51101024)
作者简介: 程从前(1982-),男,博士,讲师,从事不锈钢过流表界面洁整化加工理论及技术方面研究工作,联系地址:大连市高新园区凌工路2号大连理工大学材料学院(116085),E-mail:cqcheng@dlut.edu.cn
引用本文:   
程从前, 付琴琴, 曹铁山, 赵杰. 钝化膜质量对奥氏体不锈钢耐蚀性的影响及显色检测[J]. 材料工程, 2013, (8): 65-69.
CHENG Cong-qian, FU Qin-qin, CAO Tie-shan, ZHAO Jie. Effect of Passive Film Quality on Corrosion Resistance of Austenitic Stainless Steel and Chromaticity Inspection. Journal of Materials Engineering, 2013, (8): 65-69.
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http://jme.biam.ac.cn/CN/10.3969/j.issn.1001-4381.2013.08.011      或      http://jme.biam.ac.cn/CN/Y2013/V/I8/65
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