This work investigates the effect of temperature on the corrosion product layer of carbon steel exposed to a CO 2 -containing solution. The measurement techniques, such as scanning electron microscopy with energy dispersive spectrometry, X-ray diffraction, and X-ray photoelectron spectroscopy, were used to systematically characterize the morphology and composition of the corrosion product layer. The corrosion rates were calculated by weight loss method. The corrosion mechanisms as a function of temperature are studied and discussed. The results showed that temperature is an important factor in the corrosion rate of carbon steel.

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The present work primarily investigates the corrosion characterization of the common P110 steel and the anti-sulfide P110SS steel in CO 2 -containing solution with or without hydrosulfuric acid (H 2 S) at 70 8C. The electrochemical techniques such as potentiodynamic polarization sweep and electrochemical impedance spectroscopy (EIS) were used to disclose the differences of the corrosion mechanisms between both P110 and P110SS steels in CO 2 -containing solution with various additions of H 2 S. The EIS data fitted by ZsimpWin software were analyzed and discussed. The experimental results indicated that H 2 S could accelerate and also inhibit the corrosion attack according to the changes of corrosive environments.

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