铁在二氧化碳溶液中的腐蚀电化学行为研究

ELECTROCHEMICAL CORROSION BEHAVIOR OF IRON IN AQUEOUS CARBON DIOXIDE SOLUTION

用电化学极化曲线和交流阻抗研究了铁在二氧化碳溶液中的腐蚀电化学行为，得出了铁在二氧化碳溶液中的电化学反应机理。在所研究的ＣＯ２分压范围内，ＣＯ２促进了阴极反应，抑制了阳极溶解反应，利用弱极化曲线拟合法得出了铁的腐蚀速度、腐蚀电位与二氧化碳分压的关系，试验和理论的推导结果相吻合。

The electrochemical behavior of iron in carbon dioxide solution was studied using electrochemicalpolarization curves and AC impedance measurements. The corresponding mechanism was discussed. Car-bon dioxide inhibited the dissolution of iron and accelerated the evolution of hydrogen. The relationshipbetween the corrosion potential or the corrosion rate obtained by the low polarization region curve-fittingteclinique and the partial pressure of carbon dioxide was in accordance with the theoretical deduction.