Effect of Water on Corrosion Behavior of Stainless Steel Under High Temperature and Pressure Methanol Solution Containing Chloride Ion

The clarification of the corrosion mechanism was tried about the influence of the temperature, the amount of water, and the dissolved oxygen that caused it for the corrosion behavior of stainless steels in the methanol solution under high temperature and pressure. We obtained the following results from this experiment about the corrosion?mechanism that was not able to be clarified the experiment in an anhydrous methanol. About the corrosion form after it polarized, the general corrosion decreased because of an increase in the amount of addition. when water was added by 3%, the corrosion form showed all the pitting corrosion. The corrosion form changed greatly as the temperature rose, and all the pitting corrosion was shown by adding 1% at 200?. The self-catalyzed reaction was not confirmed in the addition of the water of 0.5%. However, if 10% was added, the Nyquist plot changed greatly, and the corrosion promotion by the self-catalyzed reaction became clear. It was clarified to the corrosion control action in the aerated anhydrous methanol solution that there was a cause in the surface adsorption action of the dissolved oxygen.