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Abstract
The corrosion of carbon steel in aqueous chloride solutions at different pH values Was studied at 25°c and 96°c. The influence on the corrosion rate of the steel of intermittent bubbling of (Cl2 + N2) and/or (H2S + N2) through the chloride solution was also investigated. Gases containing chlorine increased the corrosion rate and the pitting tendency, whereas gas mixtures containing H2S reduced the corrosion rate and the pitting tendency of the specimen. Pre-treatment with Cl2 or with H2 increased the corrosion rate. Cold working increased both the corrosion rate and the tendency to pitting. Trisodium phosphate partially inhibited the corrosion by chloride, but complete passivation was never achieved at any concentration of phosphate.
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