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.