几种表面活性剂对饱和的H2S/CO2介质中Cr13钢的吸附与缓蚀性能
Adsorption and Corrosion Inhibition of Gemini Surfactants and Imidazoline on Cr13 Steel in H2S/CO2 Saturated Medium
摘 要
采用浸泡失重法、电化学方法, 研究了在50 ℃饱和的H2S/CO2介质中Gemini表面活性剂和咪唑啉表面活性剂在Cr13钢上的吸附行为与缓蚀性能。结果表明, 所研究的几种表面活性剂均在Cr13钢表面上形成致密的单分子吸附层, 且吸附服从Langmuir方程式, 表现出优异的缓蚀性能, 明显抑制了Cr13钢在50 ℃饱和H2S/CO2介质中的腐蚀; 其缓蚀能力排序为: 12-6-12型Gemini表面活性剂>16-2-16型Gemini表面活性剂>咪唑啉。此外, 当Gemini表面活性剂的浓度达到50 mg/L时, 其缓蚀率可达到85%左右。
表面活性剂
吸附行为
缓蚀性能
Cr13 steel
surfactant
adsorption behavior
corrosion inhibition
Abstract
Adsorption and corrosion inhibition of Gemini surfactants 12-6-12, and 16-2-16 as well as imidazoline on Cr13 steel in saturated H2S/CO2 medium at 50 ℃ were studied by weight loss method, electrochemical polarization curves and EIS. The results showed that the three kinds of surfactants were excellent inhibitors for Cr13 steel in saturated H2S/CO2 medium. The corrosion inhibition of Gemini surfactants were better than that of imidazoline, and their inhibition effect reached 85%. The adsorption of three kinds of surfactants on the steel surface followed Langmiur isothermal adsorption equation. The sequence of corrosion inhibition on Cr13 steel was 12-6-12 typed Gemini surfactant > 16-2-16 typed Gemini surfactant > imidazoline.
中图分类号 TG174.42
所属栏目 试验研究
基金项目
收稿日期 2010/10/25
修改稿日期 2010/12/9
网络出版日期
作者单位点击查看
备注熊金平, 博士, 副教授,
引用该论文: LI Qiang,ZHAO Yong-feng,XIONG Jin-ping. Adsorption and Corrosion Inhibition of Gemini Surfactants and Imidazoline on Cr13 Steel in H2S/CO2 Saturated Medium[J]. Corrosion & Protection, 2011, 32(8): 620
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参考文献
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【2】Elayyachy M, El Idrissi A, Hammouti B. New thio-compounds as corrosion inhibitor for steel in 1M HCl[J]. Corrosion Science, 2006, 48(9):2470-2479.
【3】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]. Corrosion Science, 2005, 47(1):273-278.
【4】谷宁, 李春梅. 表面活性剂对碳钢的缓蚀作用及与缓蚀剂的协同效应[J]. 表面技术, 2003, 32(1):57-58, 65.
【5】陈浩, 胡悦, 毛东琳, 等. 硫酸介质中Gemini表面活性剂对A3钢的吸附缓蚀性能[J]. 腐蚀科学与防护技术, 2009, 21(1):36-39.
【6】赵景茂, 刘鹤霞, 肖超, 等. 咪唑啉衍生物在H2S水溶液中的腐蚀抑制机理[J]. 电化学, 2008, 14(1):18-23.
【7】Cheng X L, Ma H Y, Cheng S H, et al. Electrochemical behaviour of chromium in acid solutions with H2S[J]. Corrosion Science, 1999, 41(4):773-788.
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【9】袁朗白, 刘晓轩, 李向红, 等. 铜离子和聚乙二醇辛基苯基醚对钢的缓蚀协同效应[J]. 云南大学学报, 2003, 25(4):361-363.
【10】Qiu L G, Xie A J, Shen Y H. Understanding the effect of the spacer length on adsorption of gemini surfactants onto steel surface in acid medium[J]. Applied Surface Science, 2005, 246:1-5.
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