N'-(4-Methoxybenzylidene)benzohydrazide as Effective Corrosion Inhibitor for Mild Steel in 1 M HCl

Abstract

N'-(4-Methoxybenzylidene)benzohydrazide (MBBH) as inhibitor for the corrosion of mild steel in 1 M HCl was investigated by weight loss method and electrochemical techniques. Inhibition efficiency, corrosion rate and surface coverage have evaluated by varying temperature and immersion time. The inhibitor molecule might be adsorbed on the mild steel surface. Polarization curves revealed that, the synthesized N'-(4-Methoxybenzylidene)benzohydrazide inhibitor act as a mixed type inhibitor and the inhibition efficiency was about 93 %. The inhibitive action of N'-(4-methoxybenzylidene)benzohydrazide was discussed on the basis of Langmuir adsorption stable complex formed at the mild steel surface.