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为了探究管线钢L360Q在CO2体系气田采出水中的腐蚀行为,采用电化学法、失重法、扫描电镜及能谱分析技术,针对国内某气田腐蚀环境,研究了气田模拟采出水中温度、腐蚀时间、腐蚀介质流态对L360Q腐蚀的影响。结果表明:温度升高导致L360Q开路电位负移,阻抗值减小;而随着腐蚀时间的延长,开路电位正移,阻抗值增大。温度的升高加速了L360Q的腐蚀;随着腐蚀时间的延长,L360Q腐蚀速率下降,L360Q在模拟气田水中的腐蚀产物主要为FeCO_3。腐蚀介质的流动能够提高L360Q的腐蚀速率。
In order to investigate the corrosion behavior of pipeline steel L360Q in the produced water of CO2 system gas field, the electrochemical method, weight loss method, scanning electron microscopy and energy spectrum analysis were used to study the corrosion environment in a gas field in China. The effects of temperature, , Corrosive medium flow on L360Q corrosion. The results show that the increase of temperature leads to the negative shift of the open circuit potential of L360Q and the decrease of the impedance value. With the extension of the corrosion time, the open circuit potential is positive and the impedance value increases. The increase of temperature accelerated the corrosion of L360Q. With the extension of corrosion time, the corrosion rate of L360Q decreased and the corrosion products of L360Q in the simulated gas field water were mainly FeCO_3. Corrosive media flow can improve the corrosion rate of L360Q.