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Quaternary ammonium salt as effective corrosion inhibitor for carbon steel dissolution in sulphuric acid media

A. A. El Maghraby and T. Y. Soror

The influence of cetyl trimethyl ammonium bromide (CTAB) on the corrosion of carbon steel in solutions of sulphuric acid has been investigated in relation to the concentration of the inhibitor and acid as well as temperature by various monitoring corrosion techniques. Results obtained revealed that CTAB is a good mixed-type inhibitor in sulphuric acid solutions and the inhibition efficiency increases with the inhibitor concentration, while decreases with increasing the sulphuric acid concentration. The adsorption of inhibitor on the carbon steel surface is in agreement with Langmuir adsorption isotherm.