Abstract
The corrosion behavior of SAE-1020 carbon steel in H 2S-containing solutions with different concentration of HCl at 90 °C was investigated by weight loss, electrochemical measurements, SEM and XRD analysis. The results showed that the corrosion rate of carbon steel increased with increasing HCl concentration. Uniform corrosion was found on the carbon steel surface in H 2S + HCl solutions, while corrosion cavities were observed in the solution only containing H 2S. The ratio of Faradaic process of total corrosion process increased with the increase of HCl concentration. The corrosion products were solely composed of mackinawite in the H 2S-containing solutions with or without HCl.
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