一种曼尼希碱季铵盐缓蚀剂的合成与性能研究

Synthesis and Properties of a Mannich Base Quateernary Ammonium Salt

以甲醛、苯乙酮、N-甲基苯胺为原料,经缩合反应生成曼尼希碱,向生成的曼尼希碱中加入氯乙酸进行季铵化反应,最终得到具有优良的酸溶性的曼尼希碱季铵盐。曼尼希碱季铵盐在碳钢表面形成单分子吸附层,每个曼尼希碱季铵盐分子平均取代1.38个水分子。电化学阻抗测试结果显示,膜电阻与电荷传递电阻同时随着曼尼希碱季铵盐浓度的增加而增大。曼尼希碱季铵盐通过降低指前因子及增加腐蚀反应的活化能抑制腐蚀速率。将曼尼希碱季铵盐与丙炔醇复配后,可以用于180℃盐酸或土酸的酸化施工。

A mannich base was synthesized by condensation reaction with formaldehyde,hypnone and aniline as raw matenals,and then added with chloroactic acid to get the mannich base quaternary ammonium salt via quaternization.The mannich base quaternary ammonium salt has good acid-soluble performance,it forms a monolayer film on the carbon steel surface,and each mannich base quaternary ammonium salt molecule replaces 1.38 water molecules averagely.EIS results indicated that the film and charge transfer resistance increased with the increasing of concentration of mannich base quaternary ammonium salt.Through decreasing pre-exponential factor and increasing activation energy of the corrosion reaction,mannich base quaternary ammonium salt decreased the corrosion rate.After mixing the mannich base quaternary ammonium salt with propargyl alcohol,the inhibitor can be used to acidication operation for HCl or mud acid at 180 ℃.