Electrochemical Properties of Passive Film on Stainless Steel Surface in Nitric Acid Solution
摘 要
采用极化曲线、电化学阻抗谱(EIS)、Mott-Shottky曲线,研究了在不同温度、不同含量硝酸溶液中304不锈钢的耐蚀性与其表面钝化膜特性之间的相互关系。结果表明:随着温度和硝酸含量的升高,不锈钢表面钝化膜的保护性和稳定性降低;不锈钢在硝酸溶液中生成的钝化膜具有P型半导体特性;通过X射线光电子能谱(XPS)分析结果发现,不锈钢表面的钝化膜主要成分为铬和铁的氧化物,高温、高含量硝酸中生成的钝化膜中Cr (Ⅵ)含量明显较高。温度、硝酸含量的变化及钝化膜中强氧化性离子的产生会对304不锈钢表面钝化膜的生成与溶解速率产生不同程度的影响,进而影响不锈钢的耐蚀性。
Abstract
The relationship between the corrosion resistance of 304 stainless steel and the properties of passive film on its surface at different temperatures and different concentrations of nitric acid solution was studied by polarization curve, electrochemical impedance spectrum (EIS) and Mott-Shottky curve. The results show that with the increase of temperature and nitric acid concentration, the protection and stability of the passive film on stainless steel surface reduced. The passive film forming in nitric acid solution was characterized by P-type semiconductor. XPS analysis show that the passive film was mainly composed of Cr and Fe oxides, besides high content of Cr(Ⅵ) was found in passive film generated at high temperature and high concentration of nitric acid. The changes of temperature, nitric acid concentration and the generation of some strong oxidizing ions in the passive film have different effects on the generation and dissolution rate of the passive film, which affect the corrosion resistance of the stainless steel.
中图分类号 TG174 DOI 10.11973/fsyfh-201812003
所属栏目 试验研究
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收稿日期 2017/7/26
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引用该论文: ZHANG Yu,KONG Lingzhen,LU Wei,XU Guangyuan,LÜ,Haiwu,WANG Kuisheng. Electrochemical Properties of Passive Film on Stainless Steel Surface in Nitric Acid Solution[J]. Corrosion & Protection, 2018, 39(12): 906
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参考文献
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【3】王祥丽,吴继宗,垒刁,等. 304奥氏体不锈钢在不同浓度硝酸中的电化学行为[J]. 核化学与放射化学,2014,36(增刊):45-49.
【4】徐一慧,孔令真,路伟,等. 304不锈钢在硝酸环境中的腐蚀电化学行为[J]. 腐蚀与防护,2015,36(10):905-909.
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【6】王玮,赵吉庆, 张启富. 000Cr25Ni20奥氏体不锈钢在硝酸溶液中的腐蚀电化学行为[J]. 腐蚀与防护,2010,31(12):939-941.
【7】王超,支玉明,盛敏奇,等. AISI304不锈钢钝化膜在电解质溶液中腐蚀时的半导体性质[J]. 腐蚀与防护,2009,30(6):369-372.
【8】CARMEZIM M J,MONTEMOR M F,DA CUNHA BELO M,et al. Capacitance behaviour of passive films on ferritic and austenitic stainless steel[J]. Corrosion Science,2005,47(3):581-591.
【9】李金波,郑茂盛,朱杰武,等. 304L不锈钢钝化膜半导体性能研究[J]. 腐蚀科学与防护技术,2006,18(5):348-352.
【10】JAYARAJ J,RAVI SHANKAR A,KAMACHI MUDALI U,et al. Electrochemical and passive characterization of a beta type Ti45Zr38Al17 cast rod in nitric acid medium[J]. Electrochimica Acta,2012,85:210-219.
【11】张茂胜,王润生,王庭暄. 304L不锈钢钝化膜的半导体性能研究[J]. 环境技术,2013(3):41-44.
【12】向红亮,黄伟林,刘东,等. 29Cr超级双相不锈钢铸钢表面腐蚀XPS分析[J]. 腐蚀科学与防护技术,2011,23(4):303-312.
【13】孔德生,李亮. 304L电容测量研究铬表面氧化膜的半导体性能[J]. 物理化学学报,2004,20(6):631-636.
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