Effect of orange peel extract on the corrosion of mild steel in 1 M HCl solution

The orange peel extract (OPE) molecules inhibition of mild steel corrosion in 1 M HCl solution studied in this article. Orange peel is an industrial waste from juice processing so the orange peel extract is one of the possible ways for protecting mild steel from corrosion. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) showed that the OPE acts as bioinhibitor in the acidic media. The results showed that by increasing the inhibitor concentration up to 2 g L-1 and decreasing the temperature, the inhibition efficiency increased (>90%). The inhibiting effect could be attributed to the presence of organic compounds with functional groups including O, N, Cl, Br and F atoms in the OPE which are adsorbed on the surface of the mild steel that analyzed by GC-MS.