模拟海水淡化一级反渗透产水中咪唑啉复配缓蚀剂对碳钢的缓蚀效果  

Corrosion Inhibition of a Mixture Containing Imidazoline to Carbon Steel in Simulated Outlet Water from Seawater Reverse Osmosis Desalination

作　　者：刘松慧[1] 王玉娜[1] 袁斌霞[1] 董万田 廖强强[1] 

机构地区：[1]上海电力学院上海市电力材料防护与新材料重点实验室,上海200090 [2]上海发凯化工有限公司,上海201505

出　　处：《腐蚀与防护》2017年第10期789-794,共6页Corrosion & Protection

基　　金：上海市科委项目(14DZ2261000)

摘　　要：通过电化学测试、原子力显微镜(AFM)、X射线光电子能谱法(XPS)和X射线衍射法(XRD)研究了2-十一烷基-N-羧甲基-N-羟乙基咪唑啉(UHCI)与硫酸锌(ZnSO4)复配对20钢在模拟海水淡化一级反渗透产水中的缓蚀效果。结果表明:复配缓蚀剂是一种混合型缓蚀剂,能有效抑制20钢的腐蚀,复配缓蚀剂的添加总量为100mg/L时,最佳配比为50mg/L HUCI+50mg/L ZnSO4,此时缓蚀率达到96.99%;UHCI分子吸附在金属阳极区,抑制了阳极反应,ZnSO4以Zn(OH)2的形式沉积在金属阴极区,抑制了阴极反应。Corrosion inhibition of 2-undecyl-N-carboxymethyl-N-hydroxyethyl imidazoline（UHCI）in combination with ZnSO4 to 20steel in simulated outlet water from seawater reverse osmosis desalination was investigated by electrochemical testing,atomic force microscopy（AFM）,X-ray photoelectron spectroscopy（XPS）and X-ray diffraction（XRD）.Results show that the combined inhibitor,as a mixed type inhibitor,could inhibit the corrosion of20 steel effectively.The best proportion was 50mg/L HUCI＋50mg/L ZnSO4 at a total concentration of 100mg/L,and the inhibition efficiency reached to 96.99% under this condition.UHCI molecules adsorb on the surface of metal anode,and inhibit anodic reaction.Meanwhile,ZnSO4 is deposited on the surface of metal cathode in the form of Zn（OH）2,and inhibits cathodic reaction.

关 键 词：碳钢 咪唑啉 复配 海水淡化一级反渗透产水 

分 类 号：TG174[金属学及工艺—金属表面处理]