预变形对Q235钢在硫酸溶液中腐蚀行为的影响及硫脲的缓蚀作用
Effect of Predeformation on Corrosion Behavior of Q235 Steel in Sulfuric Acid Solution and Inhibiting Effect of Thiourea
摘 要
采用腐蚀失重、极化曲线和电化学阻抗谱(EIS)等方法研究了预变形对Q235钢在50 ℃硫酸溶液中腐蚀行为的影响及硫脲的缓蚀作用。结果表明: 预变形Q235钢在有、无添加硫脲的硫酸溶液中的腐蚀速率均高于未变形Q235钢的腐蚀速率, 硫脲对有、无预变形Q235钢的缓蚀作用均存在浓度极值效应；预变形加速了Q235钢在硫酸溶液中的阳极溶解和阴极的析氢反应, 使电化学阻抗变小；硫脲对阳极反应的影响与电位区间有关, 硫脲显著抑制阴极反应并表现出抑制作用的浓度极值效应。
预变形
腐蚀
硫酸
缓蚀剂
Q235 steel
predeformation
corrosion
sulfuric acid
corrosion inhibitor
Abstract
The effect of predeformation on corrosion behavior of Q235 steel in sulfuric acid solution at 50 ℃ and the inhibiting effect of thiourea were studied by weight-loss, polarization curve and electrochemical impedance spectroscopy (EIS) measurements. The corrosion rates of predeformed Q235 steel in sulfuric acid with or without thiourea were higher than those of un-deformed Q235 steel. A maximum inhibiting efficiency was observed at a certain concentration of thiourea for both predeformed and un-deformed Q235 steels. Predeformation accelerated both the anodic dissolution rate and the cathodic hydrogen-evolution reaction rate, and decreased the electrochemical impedance. The effect of thiourea on anodic reaction varied with the electrode potential. A strong inhibiting effect of thiourea on cathodic reaction was observed, exhibiting a maximum efficiency with varying thiourea concentration.
中图分类号 TG174.42 DOI 10.11973/fsyfh-201606001
所属栏目 试验研究
基金项目 上海市科委国际科技合作项目(13520721200); 上海市浦江人才计划项目(12PJ1403600); 教育部高等学校博士学科点专项科研基金博导类项目(20123108110021)
收稿日期 2015/4/11
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联系人作者吕战鹏(zplu@shu.edu.cn)
备注吕战鹏(1967-), 研究员, 博士, 从事金属腐蚀与防护的相关工作,
引用该论文: TIAN Yong-wu,LV Zhan-peng,RU Xiang-kun,CHEN Jun-jie,XIAO Qian,HAN Guang-dong. Effect of Predeformation on Corrosion Behavior of Q235 Steel in Sulfuric Acid Solution and Inhibiting Effect of Thiourea[J]. Corrosion & Protection, 2016, 37(6): 439
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【3】LPEZ D A, SIMISON S N, DE SNCHEZ S R. The influence of steel microstructure on CO2 corrosion. EIS studies on the inhibition efficiency of benzimidazole[J]. Electrochimica Acta, 2003, 48(7):845-854.
【4】KERMANI M, MORSHED A. Carbon dioxide corrosion in oil and gas production a compendium[J]. Corrosion, 2003, 59(8):659-683.
【5】张培震. 中国地震灾害与防震减灾[J]. 地震地质, 2008, 30(3):577-583.
【6】何双华. 供水管网系统抗震可靠性分析及加固优化研究[D]. 大连: 大连理工大学, 2009.
【7】许淳淳, 张新生, 胡钢, 等. 不锈钢冷加工形变诱发马氏体相变及其腐蚀行为[J]. 材料保护, 2002, 35(3): 15-17.
【8】胡钢, 许淳淳, 张新生, 等. 冷加工对304不锈钢孔蚀敏感性的影响[J]. 中国腐蚀与防护学报, 2002, 22(4): 198-201.
【9】虞海燕, 张洋, 吕爱强, 等. 异步轧制对316L不锈钢组织与性能的影响[J]. 材料与冶金学报, 2009, 8(1): 69-72.
【10】YANG W, LV Z P, HUANG D L, et al. Caustic stress corrosion cracking of nickel-rich, chromium-bearing alloys[J]. Corrosion Science, 2001, 43(5): 963-977.
【11】LV Z P, SHOJI T, DAN T C, et al. The effect of roll-processing orientation on stress corrosion cracking of warm-rolled 304L stainless steel in oxygenated and deoxygenated high temperature pure water[J]. Corrosion Science, 2010, 52(8):2547-2555.
【12】LV Z P, SHOJI T, MENG F J, et al. Characterization of microstructure and local deformation in 316NG weld heat-affected zone and stress corrosion cracking in high temperature water[J]. Corrosion Science, 2011, 53(5):1916-1932.
【13】LV Z P, SHOJI T, YAMAZAKI S, et al. Characterization of microstructure, local deformation and microchemistry in alloy 600 heat-affected zone and stress corrosion cracking in high temperature water[J]. Corrosion Science, 2012, 58(5):211-228.
【14】SHOJI T, LV Z P, YAMAZAKI S. The effect of strain-hardening on PWSCC of nickel-base alloys 600 and 690[C]//Proceedings of the 14th International Conference on Environmental Degradation Materials Nuclear Power Systems-Water Reactors. Virginia Beach:ANS, 2009:220-238.
【15】孙建波, 柳伟, 路民旭. 塑性变形条件下16MnR钢的CO2腐蚀电化学行为[J]. 材料工程, 2009(1):59-63.
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【18】路瑞玲, 邵瑜, 杨小杰, 等. 高温硫酸体系中碳钢缓蚀剂的研究[J]. 清洗世界, 2010, 26(11):1-3.
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【20】郑家燊, 吕战鹏. 二氧化碳腐蚀机理及影响因素[J]. 石油学报, 1995, 16(3):134-139.
【21】吕战鹏, 郑家燊, 刘江鸿, 等. 硫脲衍生物对CO2饱和水溶液中碳钢缓蚀性能的研究[J]. 腐蚀与防护, 1999, 20(1):18-21.
【22】古特曼. 金属力学化学与腐蚀防护[M]. 金石, 译. 北京: 科学出版社, 1989: 48.
【23】徐海波, 余家康, 董俊华, 等. 硫酸溶液中硫脲对铁缓蚀作用的电化学和SERS研究[J]. 中国腐蚀与防护学报, 1998, 18(1):14-20.
【24】董俊华, 宋光铃, 林海潮, 等. 酸性介质中硫脲及衍生物在纯铁上的吸附作用[J]. 物理化学学报, 1996, 12(1):34-38.
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