Abstract
This study investigated synergistic effect of temperature, solution velocity, and sulphuric acid concentration on corrosion behaviour of carbon steel using response surface methodology. Electrochemical and surface characterisation techniques were employed. A statistically significant mathematical model was obtained, correlating corrosion rate to the environmental parameters. Temperature affected anodic reactions, while solution velocity influenced cathodic reactions. Acid concentration profoundly influenced corrosion mechanisms by altering deposition, dissolution, and properties of FeSO4 surface layer. The lowest corrosion rate was 0.546 mm/year at 35 °C, 98.5 wt%, 0 rpm, and the highest was 368.223 mm/year under 70 °C, 49 wt% and 500 rpm.
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