Corrosion inhibition, Adsorption behaviour and Thermokinetic characteristics of 1�Benzyl�3�Hydroxy�1�H�Indazole on mildsteel in neutral medium

T.Vennila; P.Manjula

Volume : VI, Issue : VI, June - 2016

Corrosion inhibition, Adsorption behaviour and Thermokinetic characteristics of 1�Benzyl�3�Hydroxy�1�H�Indazole on mildsteel in neutral medium

T. Vennila, P. Manjula

Abstract :

 The influence of an aromatic indazole derivative 1–Benzyl–3–Hydroxy–1–H–Indazole(BHI) as corrosion inhibitor on mildsteel in 60ppm Cl– ion was studied by weight loss method and temperature studies ranging from 303K–343K.The results showed that Inhibition efficiency of BHI increase with increasing inhibitor concentration and decreased with increasing temperature. The neutral medium was found fit well for future studies. Furthermore, temperature parameter of adsorption process such as activation energy(Ea),?H, ?S, Kads were calculated and these value showed a good interaction. The adsorption of BHI on carbon steel surface is endothermic, spontaneous and consistent with langmiur,Freundlich, Temkin adsorption isotherms.Surface characterization using FT–IR, scanning electron microscopy(SEM) and Energy dispersive x–ray spectroscopy(EDS)is used to ascertain nature of protective film.The mechanistic aspects of corrosion inhibition are proposed.