流动条件下炔氧甲基季胺盐的缓蚀性能研究  

INHIBITOR PROPERTIES OF QUATERNARY ALKYNOXYMETHYL AMINE UNDER FLOWING CONDITIONS

作　　者：蒋秀[1] 郑玉贵[1] 祝英剑[1] 柯伟[1] 

机构地区：[1]中国科学院金属研究所金属腐蚀与防护国家重点实验室,沈阳110016

出　　处：《中国腐蚀与防护学报》2004年第4期234-239,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)

摘　　要：利用交流阻抗 (EIS)、线性极化、动电位极化和失重法 ,研究了炔氧甲基季胺盐对N80在常温CO2 饱和的 3%NaCl溶液中的电化学行为和缓蚀性能的影响 .结果表明 :空白溶液中N80的累计失重在 4m/s以后急剧增大 ,即介质的临界流速为 4～ 5m/s.动态下炔氧甲基季胺盐存在与静态下相同的浓度极值现象 ,流速低于 5m/s时缓蚀剂的极值浓度与静态时相同 ,都为 15 0mg/L ,而流速高于 5m/s后极值浓度有所增加 .The effect of IMC-80-Q(quaternary alkynoxymethyl amine) on the electrochemical behavior and inhibitor properties of N80 steel in 3% NaCl saturated by CO 2 at 25℃±1℃ under flowing conditions had been studied by weight loss and electrochemical techniques including EIS and linear polarization by using rotating disc electrode.The results showed that the cumulative mass loss increased greatly in the blank solution when flow velocity was higher than 4 m/s,and the critical flow velocity for the blank solution was about 4～5 m/s.The extreme-value-phenomena of concentration existed for IMC-80-Q under both flowing and static condition.150 mg/L was the best inhibitor concentration when flow velocity was lower than 5 m/s.In contrast,higher inhibitor concentration (300 mg/L for 7 m/s and 9 m/s) was required if flow velocity was higher than 5 m/s.

关 键 词：炔氧甲基季胺盐 临界流速 电化学测试 浓度极值 

分 类 号：TG174.42[金属学及工艺—金属表面处理]