Corrosion Inhibition of Mild Steel in Hydrochloric Acid Solution by Amino Acid Complexes

摘要

Using the amino acids methionine and serine reduced Schiff base and their copper(II) complexes were synthesized. The inhibition effect of these copper (II) complexes on the corrosion of mild steel in 1 M HCI solution was investigated. The corrosion inhibition action is studied through weight loss method. Among the tested complexes [CuCI(SMet)PPh3.H2O] exhibited better corrosion inhibition at 3 mmol concentration. The adsorption of the complexes on the metal surface obeys Langmuir's adsorption isotherm model.