CO2 and H2S corrosion in oil pipelines

Master's thesis in Environmental technology: water scienceThis study has been conducted to find the corrosion behavior and corrosion rates of carbon steel in the presence of CO2 and H2S at various pH levels using classical electrochemical techniques. It was found that in a galvanic coupling, the metal in the sulfide environment gets protection even at pH 3, and the bare metal which is in neutral pH was corroding sacrificially. The linear polarization resistance measurements and potentiodynamic scan of the metal without the galvanic coupling show a high degree of corrosion at pH 3. The corrosion rate generally was higher for CO2/H2S system than for H2S system