不同温度下X80钢的CO_2腐蚀电化学特性  

Electrochemical Characteristics of CO_2 Induced Corrosion of X80 at Different Temperatures

作　　者：魏爱军[1] 赵茜[1] 霍富永 田光 

机构地区：[1]西安石油大学陕西省油气田特种增产技术重点实验室,西安710065 [2]西安长庆科技工程有限责任公司,西安710018 [3]陕西省天然气股份有限公司,西安710016

出　　处：《腐蚀与防护》2012年第4期281-283,共3页Corrosion & Protection

基　　金：国家科技支撑计划项目(2006BAB03B05)"复杂油藏高效开发模式"

摘　　要：采用动电位扫描和交流阻抗技术研究了常压条件下X80钢CO2腐蚀电化学特性。结果表明:在30～80℃范围内,阳极反应机理没有发生变化,而阴极反应机理在60℃时已经发生改变;在阳极极化条件下,X80钢CO2腐蚀的电化学阻抗谱(EIS)曲线具有三个时间常数,其中低频感抗弧与试样表面活化溶解有关,低频容抗弧与试样表面腐蚀产物膜生成有关;随着温度的升高,EIS曲线低频区感抗弧逐渐缩小,容抗弧逐渐扩大。The electrochemical characteristics of CO2 induced corrosion of XS0 steel were studied by means of the measurements of EIS and potentialdynamic polarization. The results showed that the mechanism of XS0 did not change in the temperature range of 30 °C 480 °C, while the cathodic reaction mechanism of X80 changed at 60 °C. EIS presented three time-loops, in which at low frequency the inductive arc was related with the surface activation dissolution of steel and the capacitive arc was related with the formation of corrosion film. With the increase of the temperature, the inductive arc reduced and capacitive arc expanded.

关 键 词：CO2腐蚀 温度 电化学阻抗谱 X80钢 

分 类 号：TG172.6[金属学及工艺—金属表面处理]