模拟水中十二烷基苯磺酸钠对不锈钢的缓蚀作用
Corrosion Inhibition of Sodium Dodecyl Benzene Sulfonate to Stainless Steel
摘 要
利用电化学阻抗谱、极化曲线和Mott-Schottky图研究了十二烷基苯磺酸钠(SDBS)在含硫离子和氯离子的模拟水中对不锈钢电极的缓蚀性能。结果表明, 在含硫离子的模拟冷却水中加入SDBS可以使不锈钢电极的阻抗值增大, 点蚀电位提高, 不锈钢钝化膜的载流子浓度减小, SDBS有效地提高了不锈钢在含硫离子水体中的耐蚀性能。模拟水中氯离子浓度的增加使不锈钢电极的点蚀电位下降, 点蚀敏感性增加, 加入SDBS后不锈钢电极的点蚀电位提高, 甚至出现过钝化, SDBS抑制了模拟水中氯离子对不锈钢的侵蚀。
冷却水
十二烷基苯磺酸钠
缓蚀性能
stainless steel
cooling water
SDBS
corrosion inhibition performance
Abstract
The corrosion inhibition performance of sodium dodecyl benzene sulfonate (SDBS) to stainless steel in simulated cooling water containing sulfide and chloride ions was investigated by electrochemical impedance spectroscopy, polarization curves and Mott-Schottky approach. The results revealed that in simulated cooling water containing sulfide, the existence of SDBS enlarged the impedance values and raised the pitting potential of stainless steel electrode and decreased the carrier concentration of the passive film, indicating effective corrosion inhibition of SDBS to stainless steel in sulfide containing solution. The pitting potential of stainless steel electrode decreased with the increase of chloride ions in simulated cooling water whereas it shifted towards positive direction after adding SDBS, and evern reached transpasssivation potential, illustrating that corrosion of chlorideions to stainless steel was restrained by adding SDBS in simulated cooling water.
中图分类号 TG174.42
所属栏目 试验研究
基金项目 上海市重点科技攻关项目(No. 08DZ2201400,10DZ2252400,11DZ2210500); 上海市教委科创重点项目(No.12ZZ173); 上海市2010联盟计划资助
收稿日期 2011/10/20
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备注徐学敏,硕士研究生,
引用该论文: XU Xue-min,GE Hong-hua,WU Jia-ni,SUN Ran,HAN Jian-xun,XU He-li,LIU Zuo-zhen. Corrosion Inhibition of Sodium Dodecyl Benzene Sulfonate to Stainless Steel[J]. Corrosion & Protection, 2012, 33(9): 740
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参考文献
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【3】Ge H H,Xu X M,Zhao L,et al. Semiconducting behavior of passive film formed on stainless steel in borate buffer solution containing sulfide[J]. Journal of Applied Electrochemistry,2011,41(5):519-525.
【4】陈旭俊, 张闽, 徐越. 十二烷基苯磺酸钠对不锈钢孔蚀的缓蚀作用[J]. 北京化工大学学报, 1994(2):75-81.
【5】杨熙珍, 杨武. 金属腐蚀电化学热力学: 电位-pH图及其应用[M]. 北京: 化学工业出版社, 1991.
【6】Morrison S R. Electrochemistry at semiconductors and oxidized metal electrodes[M]. New York:Plenum New York Press:1980.
【7】Hajjaji N,Rico I,Srhit A,et al. Effect of N-alkylbe-taires on the corrosion of iron in 1 mol/L HCl solution[J]. Corrosion,1993,49(4):326-334.
【8】Hakiki N E,Cunha Belo M D,Simoes A M P,et al. Emiconducting properties of passive films formed on stainless steels[J]. Electrochem Soc,1998,145:3821-3829.
【9】Montemor M F,Ferreira M G S,Hakiki N E,et al. Chemical composition and electronic structure of the oxide films formed on 316L stainless steel and nickel based alloys in high temperature aqueous environments[J]. Corrosion Science,2000,42:1635-1650.
【10】葛红花, 周国定, 解群. 304、316L不锈钢耐氯离子和硫离子性能比较[J]. 华东电力, 2005, 33(9):13-15.
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