材料期刊网

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150mg/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 inhigitor properties of N80 steel in 3% NaCl saturated by CO2 at 25℃ 1℃ under flowing conditions had been studied by weight loss and electrochemical techniques including EIS and linear polarization by using rotating discelectrode. The results showed that the cumulative mass loss increased greatly in the blank solution when flow velocity was higher than 4m/s, and the critical flow velocity for the blank solution was about 4-5m/s. The extreme-value-phenomena of concentration existed for IMC-80-Q under both flowing and static condition. 150mg/L was the best inhibitor concentration when flow velocity was lower than 5m/s. In contrast, higher inhibitor concentration(300mg/L for 7m/s and 9m/s) was required if flow velocity was higher than 5m/s.