Abstract
Measurements of the corrosion rate of mild steel in 1N H 2SO 4 solution at 25°C with and without addition of thiophene mono-derivatives (1.10 −5–2.10 −2 mole/1.) were performed. Adsorption of these compounds was elucidated. Results show that thiophene and its derivatives are adsorbed on the steel surface according to Parsons and Hill de Boer isotherms. This suggests that the adsorptive properties of the compounds under consideration approach to a physical type. From th eadsorption isotherms some thermodynamic data for the adsorption process (ΔG° d8, and f) are calculated and discussed.
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