Article ID Journal Published Year Pages File Type
1470338 Corrosion Science 2011 9 Pages PDF
Abstract

The corrosion behavior of SAE-1020 carbon steel in H2S-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 H2S + HCl solutions, while corrosion cavities were observed in the solution only containing H2S. 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 H2S-containing solutions with or without HCl.

Research highlights► The corrosion rate of carbon steel increased with increasing HCl concentration. ► Uniform corrosion was found on the carbon steel surface in H2S + HCl solutions, while corrosion cavities were observed in the solution only containing H2S. ► The ratio of Faradaic process of total corrosion process increased with the increase of HCl concentration. ► The impedance diagram were tried to analyze from the theoretical calculation.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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