碱性介质温度对N80油管钢钝化膜的影响
Effect of Temperature on Passive Films of N80 Oil Tube Steel in Alkaline Solution
摘 要
通过动电位极化、电化学阻抗谱等测试方法，研究了不同温度下N80油管在碱性缓冲液（0.5 mol/L NaHCO3+0.5 mol/L Na2CO3）中生成的钝化膜的电化学性能，并用Mott-Schottky曲线分析了钝化膜的半导体性能。结果表明：随着温度升高，钝化区间减小，维钝电流密度增加，体系阻抗减小，N80钢钝化膜的稳定性变差，对基体的保护作用减弱；N80钢钝化膜半导体类型为N型半导体，升高温度后，平带电位升高，钝化膜电阻和传递电阻减小，这是因为升温导致氧空位缺陷增多，施主密度增大。
钝化膜
耐蚀性
温度影响
Mott-Schottky分析
N80 oil tube steel
passive film
corrosion resistance
effect of temperature
Mott-Schottky analysis
Abstract
The electrochemical characteristics of passive films on N80 oil tube steel in aikaline solution (0.5 mol/L NaHCO3 + 0.5 mol/L Na2CO3) at different temperatures were studied by potentiodynamic polarization and electrochemical impedance spectroscopy. The semiconductive behaviors of passive films were analyzed by Mott-Schottky plots. The results showed that with the increase of temperature, the passivation region decreased, the passive current density increased, the impedance of the system decreased, the stability of passive films of N80 steel deteriorated, and the protective effect on the substrate weakened. The N80 passive films had the features of n-type semiconductor. The donor density and flat-band potential increased, film resistance and transfer resistance decreased with increasing temperature, as results of increasing oxygen vacancies.
中图分类号 TG172.3 DOI 10.11973/fsyfh-201809009
所属栏目 试验研究
基金项目
收稿日期 2017/3/6
修改稿日期
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引用该论文: JING Jiaqiang,LUO Jun,ZHANG Jingzhong. Effect of Temperature on Passive Films of N80 Oil Tube Steel in Alkaline Solution[J]. Corrosion & Protection, 2018, 39(9): 694
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参考文献
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【5】NINGSHEN S,MUDALI U K,MITTAL V K,et al. Semiconducting and passive film properties of nitrogen-containing type 316LN stainless steels[J]. Corrosion Science,2007,49(2):481.
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【7】王冠夫,陈旭,赵阳,等. 温度对X70钢在高pH值溶液中腐蚀行为的影响[J]. 腐蚀科学与防护技术,2015,27(3):226-230.
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【9】李金波,郑茂盛. Cl-对N80油套管钢钝化膜半导体性能的影响[J]. 西安交通大学学报,2006,40(11):1325-1328.
【10】莫里森R S. 半导体与金属氧化膜的电化学[M]. 吴辉煌,译. 北京:科学出版社,1988:128-140.
【11】张云莲,史美伦,陈志源. 钢筋钝化膜半导体性能的Mott-Schottky研究[J]. 机械工程材料,2006,30(7):7-10.
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