摘要
利用交流阻抗 (EIS)、线性极化、动电位极化和拉曼光谱等方法对炔氧甲基季胺盐和咪唑啉在常温常压CO2饱和的模拟油田产出水中的电化学行为和缓蚀性能进行了研究 .结果表明 :随两种缓蚀剂的加入 ,体系的阳极电流都明显减小 ,自腐蚀电位都明显正移 ,都存在阳极脱附现象和浓度极值现象 ;炔氧甲基季胺盐的极值浓度为 1 5 0mg/L ,而咪唑啉的极值浓度为 1 0 0mg/L .咪唑啉缓蚀剂的缓蚀效果更佳 .但在 7m/s时直至缓蚀剂浓度为 30
A study on the effect of IMC 80 Q(quaternary alkynoxymethyl amine)and IMC 871 W(imidazoline)on the electrochemical behavior and inhibitor properties of N80 steel in 3% NaCl saturated by CO 2 at 25℃±1℃ was carried out by means of weight loss and electrochemistry techniques including EIS,potentiodynamic polarization and linear polarization.The sharp decrease of anodic current density i a,positive shift of corrosion potential ( E corr )and anodic desorption were observed in inhibited solutions.The electrochemical parameters R p, C d and R t exhibited extreme values at certain concentrations of two inhibitors,150 mg/L for IMC 80 Q and 100 mg/L for IMC 871 W ,respectively.IMC 871 W had better inhibitor properties than IMC 80 Q.The weight loss test at 7 m/s showed that the cumulative mass loss was decreased sharply for solutions containing IMC 80 Q,compared with inhibitor free brine,and extreme value phenomena of concentration were not observed up to 300 mg/L.
出处
《中国腐蚀与防护学报》
CAS
CSCD
2004年第1期10-15,共6页
Journal of Chinese Society For Corrosion and Protection
基金
国家自然科学基金资助项目 ( 5 0 2 710 78)
关键词
CO2腐蚀
无缝钢N80
缓蚀剂
浓度极值
阳极脱附
电化学测试
流速
CO 2 corrosion,N80 seamless steel,inhibitor,extreme value phenomena of concentration,anodic desorption,electrochemical test,flow velocity
