X65/316L电偶对在模拟油田产出水中的电偶腐蚀行为

采用电化学方法研究了X65/316L电偶对在模拟油田产出水环境中的电偶腐蚀行为。结果表明,在pH值为7.15的模拟油田产出水中,当阴阳极面积比为2、1和0.5时,电偶电位在-708～-735mV之间,随着阴阳极面积比的增大,电偶电位正移,阳极电偶电流密度增大,但阴极电偶电流密度的变化范围不大。(SCE)电偶腐蚀效应随阴阳极面积比的增大而增大。阴阳极面积比为1时,电偶电流密度随pH值的减小而增大。

Galvanic Corrosion Behevior of X65/316L Couple in Simulated Production Water

The galvanic corrosion behavior of X65 coupled with 316L stainless steel in simulated production water was investigated by electrochemical methods.The results show that when the area ratios of X65/316L were 2,1 and 0.5,the couple potentials of X65 and 316L in the simulated production water with pH 7.15 were in the range of-708 mV to-735 mV(SCE).When the area ratio increased,the anodic galvanic current density increased,while the cathodic galvanic current density almost was not changed.The galvanic effect increased with increasing the cathode/anode area ratio.When the area ratio was 1∶1,the galvanic current density increased with decreasing the pH value.