石油管线钢在H2S/CO2环境中腐蚀行为的电化学研究

摘要

The corrosion behavior of 15# steels in carbon and hydrogen sulfide solution was studied by the polarization curves and EIS. The result shows that the corrosion rate of 15# steel in NaCI solution has accelerated, when joined H2S and CO2 , moreover, from the NaCI solution, NaCI - CO2 solution to the NaCI - CO2 - H2S solution, then to NaCI - H2S solution , the electrochemical reaction process of resistance is getting smaller, the corrosion current density is bigger and the corrosive rate is faster.%采用极化曲线法和交流阻抗法研究了15#钢在H2S/CO2环境下的电化学行为.试验结果表明,H2S和CO2的存在加速了15#钢在NaCl溶液中的腐蚀速率,管线钢在NaCl溶液、NaCl-CO2溶液、NaCl-CO2-H2S溶液以及NaCl-H2S溶液中电化学反应过程所受的阻力愈来愈小,腐蚀电流密度越来越大,腐蚀速率越来越快.