咪唑啉固体缓蚀剂的溶解性能及缓蚀性能  

Solubility and Corrosion Inhibition Performance of Imidazoline Solid Inhibitor

作　　者：艾俊哲[1] 段立东 王欢[1] AI Junzhe;DU AN Lidong;WANG Huan(College of Chemistry and Environmental Engineering,Yangtze University,Jingzhou 434023,China)

机构地区：[1]长江大学化学与环境工程学院

出　　处：《腐蚀与防护》2019年第10期740-746,共7页Corrosion & Protection

摘　　要：通过正交试验制备了一种咪唑啉固体缓蚀剂,用静态玻管法和失重法分别评价了固体缓蚀剂的溶解性能和缓蚀效果。通过电化学方法研究了该固体缓蚀剂在不同温度的5%HCl溶液中对N80钢的缓蚀性能,并对缓蚀剂的吸附行为及N80钢的腐蚀形貌进行了分析。结果表明:该固体缓蚀剂是一种缓释型缓蚀剂,随着放置时间的延长,固体缓蚀剂的溶出速率逐渐降低,72h后溶出速率为0.403g/h;在5%HCl溶液中,该固体缓蚀剂能有效抑制N80钢的腐蚀,缓蚀率随温度降低和缓蚀剂加量的增加而增大;该缓蚀剂是一种阳极型缓蚀剂,在N80钢表面的吸附符合Langmuir吸附等温式,属于单分子层吸附,吸附方式为混合吸附。An imidazoline solid corrosion inhibitor was prepared by orthogonal test.The solubility and inhibition effect of the solid corrosion inhibitor were evaluated by static glass tube method and weight loss method,respectively.The corrosion inhibition performance of the solid corrosion inhibitor on N80 steel in 5%HCl solution at different temperatures was studied by electrochemical method,and the adsorption behavior of the inhibitor and corrosion morphology of N80 steel were analyzed.The experimental results show that the solid corrosion inhibitor was a slowrelease inhibitor,whose dissolution rate decreased gradually with the increase of time,and reached to 0.403 g/h after72 hours.In 5%HCl solution,the solid corrosion inhibitor could effectively inhibit the corrosion of N80 steel.The inhibition efficiency increased with the decrease of temperature and the increase of inhibitor dosage.The inhibitor was an anodic type inhibitor.The adsorption of the inhibitor on the surface of N80 steel conformed to Langmuir adsorption isotherm,which belonged to monolayer adsorption,and the adsorption mode was mixed adsorption.

关 键 词：固体缓蚀剂 缓释 咪唑啉 吸附等温式 

分 类 号：TG174.42[金属学及工艺—金属表面处理]