以癸酸,二乙烯三胺以及氯化苄为原材料反应得到癸酸咪唑啉季铵盐(DI)缓蚀剂.采用失重法、扫描电镜(SEM)以及电化学测试等评价了 DI 缓蚀剂在 1%(质量分数)羟基乙叉二膦酸(HEDP)溶液中对 N80 钢的缓蚀性能.结果表明:当 DI 质量浓度为 400 mg/L 时,缓蚀率达到74.94%.采用静态沉积法研究了DI对 1%H EDP 体系中碳酸钙的阻垢性能.结果显示,DI 的加入提升了 H EDP 对碳酸钙垢的阻垢效果.当 DI 的质量浓度为 600 mg/L 时,阻垢效率可达 93.64%,相较于未加DI 时,提高了 10%左右.通过分子动力学模拟研究了 DI 和 H EDP 在方解石(104)和(102)两个晶面的吸附行为.
Influence of Decanoic Acid Imidazoline Quaternary Ammonium Salt Corrosion Inhibitor on Corrosion and Scale Inhibition Performance of HEDP System
Decanoic acid imidazoline quaternary ammonium salt(DI)corrosion inhibitor was obtained by reaction using decanoic acid,diethylenetriamine,and benzyl chloride as raw materials.The corrosion inhibition performance of DI on N80 steel in a 1%hydroxyethylenediphosphonic acid(HEDP)solution was evaluated by weight loss mothod,SEM,and electrochemical testing.The results show that when the DI concentration was 400 mg/L,the corrosion inhibition rate reached 74.94%.The scale inhibition performance of DI on calcium carbonate in 1%HEDP system was studied using static deposition method.The results show that the addition of DI improved the scale inhibition effect.When the concentration of DI was 600 mg/L,the scale inhibition efficiency could reach 93.64%,which was about 10%higher than when DI didn't add.The adsorption behavior of DI and HEDP on the crystal planes of calcite(104)and(102)was studied through molecular dynamics simulation.
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