油水交替环境中咪唑啉对CO_(2)腐蚀的抑制作用研究  

Inhibition of Imidazolines on CO_(2)Induced Corrosion of Carbon Steel in Oil and Water Alternatively Wetting Conditions

作　　者：欧阳嘉露 王茜茜 韩霞[2] 王子明 OUYANG Jialu;WANG Xixi;HAN Xia;WANG Ziming(Center for Marine Materials Corrosion and Protection,College of Materials,Xiamen University,Xiamen 361005,China;Sinopec Petroleum Engineering Design Co.,Ltd.,Dongying 257026,China)

机构地区：[1]厦门大学材料学院海洋材料腐蚀防护研究中心,厦门361005 [2]中石化石油工程设计有限公司,东营257026

出　　处：《中国腐蚀与防护学报》2024年第3期707-715,共9页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(52271075)。

摘　　要：通过添加两类典型油溶性和水溶性咪唑啉缓蚀剂,检验了其在油水动态润湿环境中对碳钢CO_(2)腐蚀的抑制效果。研究表明,水溶性咪唑啉的缓蚀效果优于油溶性咪唑啉,其缓蚀效果差异主要源于油水界面行为的改变。油溶性咪唑啉分子通过增强油相中自修复作用来提高缓蚀效果;水溶性咪唑啉分子可以有效抑制油水界面水滴的形成和长大等过程,减弱CO_(2)对油膜的破坏作用,增强动态润湿缓蚀效果。Corrosion inhibitor is the most commonly used for corrosion control in oil production,but the relevant inhibition mechanism in complex CO_(2)containing multiphase flow environment is still unclear.The effect of two typical oil-soluble and water-soluble imidazoline inhibitors on CO_(2)induced corrosion of carbon steel in oil and water alternatively wetting conditions was investigated.It was found that the corrosion inhibition effect of the water-soluble imidazoline was better than that of the oil-soluble imidazoline,and the difference was mainly attributed to the performance of interface oil/water.The oil-soluble imidazoline molecules can improve the inhibition effect by enhancing the self-repair on the oil phase side,while the water-soluble imidazoline molecules can effectively inhibit the generation and growth of water droplets at the interface oil/water,weaken the rupture of CO_(2)to the oil layer,and enhance the corrosion inhibition in dynamic wetting conditions.

关 键 词：CO_(2)腐蚀 咪唑啉类缓蚀剂 油水交替润湿 

分 类 号：TG174[金属学及工艺—金属表面处理]