苯并三氮唑曼尼希碱缓蚀剂的合成与缓蚀性能研究

Composition and Inhibition Performance of Benzotriazole Mannich Base

以多聚甲醛,苯丙三氮唑、丙炔醇为原料,经过缩合反应生成曼尼希碱。在模拟现场环境的条件下对所合成的曼尼希碱进行了电化学测试和模拟工况高压性能评价。利用分子动力学模拟方法探讨了其在Fe表面的吸附作用。电化学测试表明:随着合成产物加量的增大,自腐蚀电位逐渐提高,腐蚀电流降低,加量的增大增加了腐蚀介质传递的阻力,减缓了腐蚀。高温高压模拟实验显示加入曼尼希碱后腐蚀速率明显降低。量子化学分析表明:苯并三氮唑曼尼希碱分子中的苯并三氮唑环易与Fe原子形成配位键;苯并三氮唑环和炔基均倾向于平行吸附于铁金属表面。

The benzotriazole Mannich base were synthesized with propargyl alcohol,paraformaldehyde and benzotriazole.The electrochemical test and high temperature&pressure performance evaluation of Mannich base were carried out with simulated field conditions.The adsorption behavior of the compound on Fe surface was analyzed through molecular dynamics simulation.The electrochemical test results show that with the increase of the amount of synthetic products,the self-corrosion potential gradually increases;the corrosion current decreases,and the increase of the addition increases the resistance of the corrosion medium to slow down the corrosion.The high temperature and high pressure simulation experiments show that the corrosion rate was obviously reduced after the addition of Mannich base.The results of quantum chemistry calculations showed that the Mannich bases can coordinate with Fe atom through the benzotriazole ring;the benzotriazole ring and propynyl tend to be absorbed on the iron surface in parallel.