Effects of Potential Scanning Rate on Tested Corrosion Resistance of 304 Stainless Steel
摘 要
采用动电位极化测量技术测量304 不锈钢在3.5%NaCl水溶液中不同电位扫描速率下的极化曲线, 并且采用Tafel直线外推法测定了该钢的自腐蚀电流密度、自腐蚀电位、自腐蚀速率以及不锈钢钝化膜的击破电位。结果表明, 在3.5%NaCl 溶液中, 随着电位扫描速率的增大304不锈钢钝化膜的击破电位降低, 自腐蚀电流密度增大, 自腐蚀电位负移。
Abstract
Polarization curves of the stainless steel were measured in 3.5% NaCl solution at different potential scanning rates. The corrosion potential, corrosion current density and corrosion rate were obtained by Tafel line extrapolation method and breakdown potential of the passive film was recorded. The results show that the breakdown potential of the passive film on the stainless steel lowered with the increase of potential scanning rate. The corrosion potential decreased and corrosion current density increased when the potential scanning rate increased.
中图分类号 TG174.3
所属栏目 试验研究
基金项目 国家973项目(2009CB24305); 大连理工大学大学生创新实验项目(2011055)
收稿日期 2012/4/5
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备注赵杰, 教授, 博士,
引用该论文: DUAN Chuan-cheng,CHENG Cong-qian,ZHAO Jie. Effects of Potential Scanning Rate on Tested Corrosion Resistance of 304 Stainless Steel[J]. Corrosion & Protection, 2013, 34(3): 197
被引情况:
【1】文雯,陈荐,肖祥武,任延杰, "燃料电池用316L不锈钢双极板表面磁控溅射铬涂层的耐腐蚀性能",机械工程材料 38, 76-79(2014)
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参考文献
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【2】姜应律, 吴荫顺.利用极化曲线推测中性水溶液中钛合金表面的氧化还原反应机理[J]. 北京科技大学学报, 2004, 36(4):395-398.
【3】董超芳, 李晓刚, 武俊伟, 等.土壤腐蚀的实验研究数据处理[J]. 腐蚀科学与防护技术, 2003, 15(3):154-160.
【4】姜应律, 吴荫顺.用极化曲线研究钛合金在水, 醇中腐蚀机理的差异[J]. 腐蚀科学与防护技术, 2005, 17(3):154-158.
【5】周德璧, 崔莉莉, 李琳, 等.304不锈钢在垃圾渗滤液中的腐蚀行为[J]. 腐蚀科学与防护技术, 2009, 21(9):48-51.
【6】Poursaee A. Determining the appropriate scan rate toper form cyclic polarization test on the steel bars in concrete[J]. Electrochim Acta, 2010, 55(3):1200-1206.
【7】Rees N V, Klymenko O V, Coles B A, et al. Fast scan linear sweep volt ammetry at a high speed wall tube electrode[J]. J Electroanaly Chem, 2003, 557(1):99-107.
【8】贾志军, 李晓刚, 杜翠薇.电位扫描速率对电极过程动力学参数测试结果的影响[J]. 腐蚀与防护, 2010, 31(11):829-832.
【9】Zhang X L, Jiang Z H, Yao Z P, et al. Effect of scan rate on the potentio nal dynamic polarization curve obtained to determine the Tafel slopes and corrosion current density[J]. Corrosion, 2009, 51(2):581- 587.
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