CO_2饱和溶液中缓蚀剂的电化学行为及缓蚀性能  

ELECTROCHEMICAL BEHAVIOR AND INHIBITION PERFORMANCE OF INHIBITOR IMC-871-G IN CO_2 SATURATED SOLUTION

作　　者：杨怀玉[1] 曹殿珍[1] 陈家坚[1] 祝英剑[1] 时维才[2] 钱家煌[2] 郭文斌[2] 

机构地区：[1]中国科学院金属腐蚀与防护研究所,沈阳110015 [2]江苏石油勘探局工程技术研究院,江苏邵伯225261

出　　处：《腐蚀科学与防护技术》2000年第4期211-214,共4页Corrosion Science and Protection Technology

摘　　要：利用电化学交流阻抗 (EIS)、极化曲线和高压釜实验装置 ,分别在CO2 饱和及高CO2 分压下的模拟油田产出水中 ,对IMC 871 G缓蚀剂的电化学行为及缓蚀性能进行了研究 .结果表明 :随着缓蚀剂的加入 ,阴阳极腐蚀电流密度明显减小 ,腐蚀电位逐渐正移 ,阳极过程受到较大程度的抑制 ,表明药剂为阳极吸附型缓蚀剂 ,且附合Langmuir等温吸附规律 .Electrochemical behavior and inhibition performance of the inhibitor IMC 871 G in simulation water saturated with CO 2 or at high partial pressure of CO 2 were investigated in an autoclave by using electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization technique. The results showed that the inhibitor had an effective protection against the corrosion caused by CO 2 for N\|80 steel. With increasing inhibitor concentration, the anodic process of corrosion was retarded effectively by adsorption of inhibitor molecule on the electrode's surface and corrosion potential shifts to the positive direction, which demonstrates that the inhibitor is an anodic adsorption type. The adsorption behavior of inhibitor followed the Langmuir isotherm. At higher concentration, the phenomena of desorption of inhibitor was detected when electrodes were polarized anodicaly.

关 键 词：CO2腐蚀 缓蚀剂 缓蚀性能 电化学行为 

分 类 号：TG174.42[金属学及工艺—金属表面处理]