L-Dopa as Corrosion Inhibitor for Mild Steel in Mineral Acid Medium

摘要

Corrosion inhibition of mild steel was studied using L-Dopa in aqueous hydrochloric acid and sulphuric acid solutions.The corrosion behaviours of the steel specimen in the presence of inhibitor weret studied by galvanostatic polarizationand weight loss techniques. The measured electrochemical data indicated good inhibition of corrosion in both thecorrosive medium in presence of L-DOPA. The corrosion inhibition may be explained on the basis of adsorption and formationof surface film of L-DOPA on the metal surface. The surface of the steel specimen subjected to electrochemicalcorrosion in the presence and absence of the inhibitor was studied using scanning electron microscopic images.