本工作用失重法和交流阻抗法研究了非离子型表面活性剂平平加0-20对碳钢在1N HCl和1NH_2SO_4溶液中腐蚀行为的影响,以及同主体缓蚀组份之间的相互关系。结果表明,平平加0-20对碳钢在酸中的腐蚀具有一定的抑制作用。这是通过表面活性剂分子在碳钢界面上的松散吸附而实现的。而且在HCl和H_2SO_4溶液中得到相同的吸附模型。在同主体缓蚀剂共存时。随着缓蚀剂浓度的不同,表现出缓蚀剂分子和平平加分子之间的平行吸附和竟争吸附两种不同的行为。
The effect of a non-ionic surfactant on the corrosion behaviour of carbon steel and the interaction between nonionic surfactant and main inhibitors was investigated by measurement of weight loss and AC impedance in 1N HCl and 1N H_2SO_4 solutions. It has been shown that the nonionic surfactant has marked inhibiting effect on the corrosion of carbon steel. The same adsorption model is obtained both in IN HCl and 1N H_2SO_4 when concentration of thenonionic surfactant is not less than 0.001％. It seems that the surfactant is loosely adsorbed on carbon steel. At low concentrations of these main inhibitors, simultaneous adsorption of nonionic surfactant and main inhibitor occurs. At higher concentrations of the main inhibitors, there is a competetive adsorption effect between the main inhibitor and non-ionic surfactant.
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