CO_2分压对油管钢CO_2/H_2S腐蚀的影响

Effect of CO_2 Partial Pressure on CO_2/H_2S Corrosion of Oil Tube Steel

采用高温高压釜、失重法和扫描电镜,对不同CO2分压(310 2642、930 7926、1551 3210、2171 8494kPa)条件下油管钢N80和P110的CO2/H2S腐蚀进行了研究。结果表明,随着CO2分压的升高,两种钢的CO2/H2S腐蚀速率均单调增加;除了CO2分压极低的情况以外,P110钢的腐蚀速率总是大于N80钢。

Using an autoclave, weight-loss method and SEM, the CO_2/H_2S corrosion behaviors of oil tube steels N80 and P110 at different CO_2 partial pressure (310264 2 , 930792 6 , 1 551321 0 , 2 171849 4 kPa) are studied. The results show that their CO_2/H_2S corrosion rates increase with increasing CO_2 partial pressure, and the corrosion rates of steel P110 are nearly always higher than that of steel N80 except when CO_2 partial pressure is very low.