Gemini表面活性剂的缓蚀性研究

通过失重法和电化学测试方法研究了在50℃时饱和H2S／CO2介质中季铵盐类12-s-12（s=2，3，4，5和6）型Gemini表面活性剂对Crl3钢的吸附缓蚀性能及其机理。结果表明：50℃时Gemini表面活性剂在饱和H2S／CO2介质中对Crl3钢具有较好的缓蚀效果，其中12—6-12型Gemini表面活性剂的缓蚀性能最佳，缓蚀率能达到90％以上。研究得出间隔基变化对表面活性剂缓蚀性能的影响规律．用电化学极化曲线法和交流阻抗谱图讨论了这种规律的作用机理。12-s-12型Gemini表面活性剂为阴极型缓蚀剂。

Absorption and corrosion Inhibition Performances of Gemini Surfactant in Saturated H2S/CO2 medium

Adsorption and corrosion inhibition performances of steel quaternary ammonium salt type Gemini surfactants 12-s-12 （s= 2,3,4,5,6） on Grl3 steel in saturated H2S/CO2 medium at 50 ℃were studied using weight loss and electrochemical test methods. The results revealed that the Gemini surfactants were excellent inhibitors for Crl3 steel protection in saturated H2S/CO2 medium at 50℃, in which 12-6-12-type Gemini surfactant offered best performance and its inhibition efficiency was above 90 %. The law of impact of interval-based changes on the surfactant＇s corrosion inhibition performance was found in the study, and electrochemical polarization curves and electrochemical impedance spectroscopy were used to discuss the mechanism of the law. 12-s-12-type Gemini surfactants were a cathode corrosion inhibitor.