Effect of acetic acid in CO2-H2S corrosion of carbon steel at elevated temperature

Abstract

The effect of acetic acid on carbon steel corrosion in CO2-H2S solution at elevated temperature is studied using weight loss measurements and other techniques. Increase in temperature and acetic acid increases the corrosion rate of carbon steel. The effect is more predominant at higher pressure of H2S (H2S dominating) than at lower H2S pressure (CO2 dominating). The type of corrosion appears to be of pitting whose severity increases with the increase in temperature and acetic acid concentration.