含双键酰胺咪唑啉季铵盐缓蚀性能研究

Study on corrosion inhibition capacity of amide imidazoline quaternary ammonium salt containing double bond inhibitor

以高纯环烷酸等为原料,合成了一种含双键酰胺咪唑啉季铵盐缓蚀剂(DAQS),采用挂片失重法和电化学方法评价了其缓蚀性能。失重法结果表明:该药剂对碳钢具有良好的缓蚀效果,在强酸性溶液中,控制适当的条件均可使缓蚀率达90%左右;极化曲线表明,该药剂是以阴极型为主的混合型缓蚀剂;交流阻抗谱得出其缓蚀率随药剂浓度变化的顺序关系与碳钢挂片试验结果相一致。

Amide imidazoline quaternary ammonium salt containing double bond （DAQS） has been synthesized with naphthenic acid, etc. as raw materials, and its corrosion capacity evaluated by coupon weight loss method and elec- trochemical method. The results of weight loss method show that this chemical has good corrosion inhibition effect on carbon steel. In strong acidic solution,the corrosion inhibiting rate is about 90%,if the conditions are controlled properly. Polarization curves show that this chemical is a kind of mixed-type corrosion inhibitor, mainly cathode type. AC impedance spectroscopy displays that the result of the ordinal relationship of the corrosion inhibiting rate which changes with the change of reagent concentration and the result of carbon steel coupon experiments are consistent.