高氯介质中pH对316L不锈钢和Q235碳钢腐蚀行为的影响
Effect of pH on Corrosion Behaviors of 316L Stainless Steel and Q235 Carbon Steel in High Chloride Solution
摘 要
采用电化学阻抗谱、极化曲线、丝束电极等技术研究了316L不锈钢和Q235碳钢在不同pH且含有高浓度氯化物的高炉煤气冷段管道冷凝液模拟液中的腐蚀行为。结果表明，随着溶液pH的升高，两种材料的阻抗值均逐渐增大，316L不锈钢的钝态电流密度和Q235碳钢的腐蚀电流密度均减小。丝束电极电流分布图中阳极电流区域随溶液pH的升高而减小，不锈钢和碳钢分别表现出局部腐蚀和全面腐蚀的特征。
碳钢
pH
丝束电极
316L stainless steel
Q235 carbon steel
pH
wire beam electrode(WBE)
Abstract
The corrosion behaviors of 316L stainless steel and Q235 carbon steel in the simulated solutions with high concentration of chloride and different pH were studied by electrochemical impedance spectroscopy (EIS), polarization curves and wire beam electrode (WBE). The results showed that with the increase of solution pH, the impedance value of the two materials increased gradually, while the passivity current density of 316L stainless steel and corrosion current density of Q235 carbon steel decreased. Furthermore, the zones of anodic current decreased sharply in the WBE current distribution maps, and the stainless steel showed localized corrosion and the carbon steel showed general corrosion feature.
中图分类号 TG174
所属栏目 试验研究
基金项目 上海市科委项目(11DZ2210500; 12DZ2280300)
收稿日期 2014/4/28
修改稿日期
网络出版日期
作者单位点击查看
备注孟新静(1980-),讲师,硕士,从事材料的腐蚀与防护研究,
引用该论文: MENG Xin-jing,JIN Zhi-hao,GE Hong-hua. Effect of pH on Corrosion Behaviors of 316L Stainless Steel and Q235 Carbon Steel in High Chloride Solution[J]. Corrosion & Protection, 2014, 35(9): 866
被引情况:
【1】胡苧尹,王志武, "燃气余热锅炉高压蒸发器管SA210钢焊缝腐蚀特征分析",腐蚀与防护 36, 860-863(2015)
【2】金文倩,马春红,莫东平,程子非,侯 峰, "金属管材在模拟地热水中的腐蚀结垢性能",腐蚀与防护 37, 707-710(2016)
【3】时军波,陈立宗,丁宁,徐娜,郭卫民,臧启山,胡志文, "热交换器不锈钢传热板片的腐蚀失效原因",腐蚀与防护 37, 71-75(2016)
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参考文献
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【2】YANG S F,MACDONALD D D. Theoretical and experimental studies of the pitting of type 316L stainless steel in borate buffer solution containing nitrate ion[J]. Electrochimica Acta,2007,52(5):1871-1879.
【3】MOUSSA S O,HOCKING M G. The photo-inhibition of localized corrosion of 304 stainless steel in sodium chloride environment[J]. Corrosion Science,2001,43(11):2037-2047.
【4】SITON M,OSHIKAMA W,ISHIKAWA T. Anomalous dimension in pitting corrosion of SUS304 in a NaCl solution[J]. Corrosion Science,2002,44(7):1469-1475.
【5】王丹,李国希,章红春,等. 用丝束电极研究SO42-对纯铝缝隙腐蚀的影响[J]. 腐蚀与防护,2006,27(1):7-10.
【6】胡金丰,李国希,邓恺,等. 用丝束电极研究混凝土中钢筋腐蚀的不均匀性[J]. 中国腐蚀与防护学报,2005,25(2): 88-92.
【7】WANG T,TAN Y J. Understanding electro deposition of polyaniline coatings for corr osion prevention applications using the wire beam electrode method[J]. Corrosion Science,2006,48:2274-2290.
【8】刘婧,刘宏芳,许立铭,等. 采用丝束电极研究硫酸盐还原菌生物膜的电化学不均匀性[J]. 腐蚀与防护,2000,22(8): 325-327.
【9】董泽华,郭兴蓬,刘宏芳. 用丝束电极研究SRB微生物诱导腐蚀的电化学特征[J]. 腐蚀与防护学报,2002,22(1): 48-53.
【10】CABOT P L,GARRIDO J A,PE′REZ E,et al. EIS study of heat-treated Al-Zn-Mg alloys in the passive and transpassive potential regions[J]. Electrochimica Acta,1995,40(4):447-454.
【11】吴新民,邵秀丽,薛晨,等. pH值对碳钢在高含硫油田水中腐蚀行为的影响[J]. 中国腐蚀与防护学报,2013,33(2): 159-163.
【12】王巧玲,黄桂芳. 用丝束电极研究NaNO2对钢铁防护性能的影响[J]. 中南大学学报:自然科学版,2008,39(2): 317-321.
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