Abstract
The inhibition effect of sulfamethoxazole on mild steel corrosion in 1‐M hydrochloric acid solution is investigated by electrochemical and quantum chemical measurements. Electrochemical polarization studies show that sulfamethoxazole acts as a mixed‐type corrosion inhibitor. The adsorption of the inhibitor on mild steel in 1‐M hydrochloric acid system is studied at different temperatures (303‐333 K). The adsorption of sulfamethoxazole on mild steel surface is an exothermic process and obeys the Temkin adsorption isotherm. Based on the potential of zero charge values and quantum chemical parameters, the mechanism of adsorption is proposed.
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