用闭塞电池研究月桂酸根离子抑制碳钢垢下腐蚀的机理
Under-deposit Occluded Cell Corrosion Inhibition Mechanism of N80 Steel in NaCl Solution Added with Sodium Laurate
摘 要
利用一种能够模拟局部腐蚀自催化过程的闭塞电池(OCC),通过耦合电流、极化电阻、电化学阻抗等,测量研究了月桂酸根离子(C12H23O-2)在中性NaCl溶液中对N80钢垢下闭塞区腐蚀行为的抑制机制.结果表明:C12H23O-2在碳钢表面吸附并通过垢层向闭塞区迁移,闭塞区内外电极极化电阻增大,腐蚀反应的阴阳极过程都受到抑制.C12H23O-2在垢层吸附,使垢层电阻增大,离子迁移阻力增大.这几种因素共同作用的结果抑制了闭塞区的腐蚀.
闭塞腐蚀电池
碳钢
吸附
月桂酸盐
underdeposit corrosion
occluded corrosion cell
N80 steel
adsorption
laurate
Abstract
Using a simulated occluded corrosion cell(OCC),the inhibition mechanism of sodium laurate (C12H23O2Na) preventing from the underdeposit occluded cell corrosion of N80 steel in 0.2 mol/L NaCl solution was studied by electrochemical methods,including measurements of coupling currents,polarization resistance,electrochemical impedance spectroscopy(EIS).The results showed that C12H23O-2 could migrate into the occluded cavity through the deposition and adsorption on the N80 steel surface in NaCl solution,which increased the polarization resistance of the occluded anode and the bulk cathode,obstructing both the anodic and cathodic processes.Due to the adsorption of C12H23O-2 on the deposited layer,the resistance of deposited layer increased markedly so as to prevent ions from migrating through the scale layer.All these effects resulted in inhibition of the underdeposit corrosion of N80 steel.
中图分类号 TG174.42 TG174.3
所属栏目 试验研究
基金项目 河南省科技攻关项目(0524270015)
收稿日期 2009/2/18
修改稿日期 2009/3/19
网络出版日期
作者单位点击查看
备注朱元良,副教授.
引用该论文: ZHU Yuan-liang,JI E-yu,QIU Yu-bing,GUO Xing-peng. Under-deposit Occluded Cell Corrosion Inhibition Mechanism of N80 Steel in NaCl Solution Added with Sodium Laurate[J]. Corrosion & Protection, 2010, 31(2): 111～114
被引情况:
【1】翟海舟, "锅炉底板裂缝泄漏失效分析",理化检验－物理分册 49, 255-259(2013)
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参考文献
【1】Gan Y,Li Y,Lin H C.Experimental studies on the local corrosion of low alloy steels in 3.5% NaCl[J].Corros Sci,2001,43:397-411.
【2】Zuo Y,Wang H T,Zhao J M,et al.The effects of some anions on the metastable pitting of 316L stainless steel[J].Corros Sci,2002,44(1):13-24.
【3】赵景茂,左 禹.三种缓蚀性阴离子对碳钢在NaHCO3-NaCl溶液中点蚀的抑制作用[J].中国腐蚀与防护学报,2004,24(3):174-178.
【4】许淳淳,吴小梅.几种阴离子对AISI304不锈钢孔蚀的影响[J].中国腐蚀与防护学报,2003,23(3):129-133.
【5】刘幼平.蚀孔、缝隙和裂缝内腐蚀的控制方法及研究进展[J].化工进展,1995(1):6-10.
【6】Qiu L G,Xie A J,Shen Y H.The adsorption and corrosion inhibition of some cationic gemini surfactants on carbon steel surface in hydrochloric acid[J].Corros Sci,2005,47:273-279.
【7】M S de Sa,Sequeira C A C.Mild steel pitting corrosion inhibition by organic carboxylates[J].Corrosion Prevention & Control,1991,38:55.
【8】Kern P,Landolt D.Adsorption of organic corrosion inhibitors on iron in the active and passive state.A replacement reaction between inhibitor and water studied with the rotating quartz crystal microbalance[J].Electrochimica Acta,2001,47:589-598.
【9】Foad Ei Sherbini,E E.Effect of some ethoxylated fatty acids on the corrosion behavior of mild steel in sulphuric acid solution[J].Materials Chemistry and Physics,1999,60(3):286-290.
【10】许淳淳,傅晓萍,刘幼平.几种有机阴离子的电迁移及其对闭塞区的影响[J].中国腐蚀与防护学报,2001,21(1):26-31.
【11】赵艳娜,朱元良,郭兴蓬.月桂酸根离子的吸附及其对N80钢垢下腐蚀的影响[J].腐蚀与防护,2008,29(5):247-250.
【12】朱元良,郭兴蓬.中性介质中碳钢腐蚀沉积膜下局部腐蚀行为[J].中国腐蚀与防护学报,2008,28(5):271-275.
【2】Zuo Y,Wang H T,Zhao J M,et al.The effects of some anions on the metastable pitting of 316L stainless steel[J].Corros Sci,2002,44(1):13-24.
【3】赵景茂,左 禹.三种缓蚀性阴离子对碳钢在NaHCO3-NaCl溶液中点蚀的抑制作用[J].中国腐蚀与防护学报,2004,24(3):174-178.
【4】许淳淳,吴小梅.几种阴离子对AISI304不锈钢孔蚀的影响[J].中国腐蚀与防护学报,2003,23(3):129-133.
【5】刘幼平.蚀孔、缝隙和裂缝内腐蚀的控制方法及研究进展[J].化工进展,1995(1):6-10.
【6】Qiu L G,Xie A J,Shen Y H.The adsorption and corrosion inhibition of some cationic gemini surfactants on carbon steel surface in hydrochloric acid[J].Corros Sci,2005,47:273-279.
【7】M S de Sa,Sequeira C A C.Mild steel pitting corrosion inhibition by organic carboxylates[J].Corrosion Prevention & Control,1991,38:55.
【8】Kern P,Landolt D.Adsorption of organic corrosion inhibitors on iron in the active and passive state.A replacement reaction between inhibitor and water studied with the rotating quartz crystal microbalance[J].Electrochimica Acta,2001,47:589-598.
【9】Foad Ei Sherbini,E E.Effect of some ethoxylated fatty acids on the corrosion behavior of mild steel in sulphuric acid solution[J].Materials Chemistry and Physics,1999,60(3):286-290.
【10】许淳淳,傅晓萍,刘幼平.几种有机阴离子的电迁移及其对闭塞区的影响[J].中国腐蚀与防护学报,2001,21(1):26-31.
【11】赵艳娜,朱元良,郭兴蓬.月桂酸根离子的吸附及其对N80钢垢下腐蚀的影响[J].腐蚀与防护,2008,29(5):247-250.
【12】朱元良,郭兴蓬.中性介质中碳钢腐蚀沉积膜下局部腐蚀行为[J].中国腐蚀与防护学报,2008,28(5):271-275.
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