ZS曼尼希碱缓蚀剂的制备与性能  

Synthesis and Performance of ZS Mannich Base Inhibitor

作　　者：周书胜 王任芳[1] 李克华[1] 石东坡[1] 苏铁军[2] 

机构地区：[1]长江大学化学与环境工程学院,湖北荆州434023 [2]长江大学工程技术学院,湖北荆州434020

出　　处：《材料保护》2017年第8期23-27,共5页Materials Protection

基　　金：国家自然科学基金(41202111);湖北省教育厅科学技术研究项目(B2016445)资助

摘　　要：为了解决在油气田酸化过程中酸液对地面管路及井筒管壁造成严重腐蚀的问题,合成了一种新型的噻唑类曼尼希碱缓蚀剂来保护金属。通过静态失重法、电化学方法和分子动力学模拟方法研究了该缓蚀剂在15%盐酸腐蚀介质中对N80钢的缓蚀性能。静态失重法表明:在加入1.0%(质量分数)优选配方合成的缓蚀剂ZS的腐蚀介质中N80钢的腐蚀速率为0.412 9 g/(m^2·h),远优于SY 5405-1996中的一级标准。电化学测试表明:该缓蚀剂是以抑制阳极反应为主的混合型缓蚀剂,其在N80钢表面上的吸附行为服从Langmuir吸附等温式,说明缓蚀剂ZS在N80钢上形成了单分子层吸附。分子动力学模拟结果表明:在介质中缓蚀剂分子可以稳定地吸附在金属表面,并有效地将金属表面和腐蚀介质隔开,从而起到缓蚀作用。A new-type of ZS thiazole corrosion inhibitor was synthesized for solving the problems of acid solution corroding the groud pipelines and shaft wall during the acidification process of oil field.The inhibition performance of ZS mannich base inhibitor on N80 steel immersed in 15% hydrochloric acid solution was studied by means of mass loss method and electrochemical tests.The static weight-loss method showed that when the dosage of inhibitor was 1.0%,the corrosion rate of N80 steel in 15% HC1 solution was 0.412 9 g/（m2 ＆#183; h）,much higher than national standard.Electrochemical test results exhibited that the ZS mannich base belonged to mainly anodic-controlling composite corrosion inhibitor and the adsorption process of ZS corrosion inhibitor on N80 steel was subject to Langmiur adsorption isotherm,which expressed that the inhibitor formed a monolayer adsorption on N80 steel.Furthermore,the simulation results of molecular dynamics showed that ZS molecules could be adsorbed steady on the steel surface and prevent the metal surface from water and corrosive medium in the liquid.

关 键 词：缓蚀剂 曼尼希碱 噻唑 缓蚀机理 

分 类 号：TG174.42[金属学及工艺—金属表面处理]