一种酸化缓蚀剂的合成及性能研究

Study on the synthesis and performance evaluation of a kind of acidizing corrosion inhibitor

以甲醛、乙二胺、苯乙酮为反应主要原料,利用Mannich反应合成了曼尼希碱缓蚀剂。最佳合成条件:反应温度50℃,反应时间12 h,pH值为4,苯乙酮、甲醛、乙二胺物质的量比为2:4:1。用静态失重法对其缓蚀性能进行了综合评价。结果表明,在90℃、15%的盐酸中加入1%的缓蚀剂,N-80钢片的腐蚀速率可以达到2.473 g/(m2.h),具有良好的缓蚀性能。

A new acidizing corrosion inhibitor was synthesized by Mannich reaction with formaldehyde,ethylenediamine and acetophenone as the raw materials.The optimal synthetic conditions were found as follows：reaction temperature 50 ℃,the reaction time 12 h,pH value 4.0,molar ratio of acetophenone,formaldehyde and ethylenediamine 2 ∶ 4 ∶ 1.The performance of corrosion inhibitor was evaluated by zero-gravity test.The results indicated that at 90 ℃,20%HCl with 1.0% corrosion inhibitor,the corrosion rate was 2.473 g/（m2·h）,the inhibition efficiency was the best.