The inhibition effect of [3-(4-hydroxy-3-methoxy-phenyl)-1-(2-hydroxy-Phenyl-propenone] on the corrosion of the aluminium in alkaline medium

N Santhini, T Jeyaraj

Abstract

The inhibition effect of [3-(4-hydroxy-3-methoxy-phenyl)-1-(2-hydroxy-phenyl-propenone (HMPHPP) on aluminium metal in 1.0 N NaOH was studied by weight loss, polarization measurements and SEM technique. The inhibition efficiency was found to increase with increasing concentrations of the inhibitor. The maximum inhibition efficiency was 72.5%. The effect of temperature on the corrosion inhibition was studied and the inhibition efficiency was found to decrease with the increase of temperature. The inhibitor was mixed type and it was found to obey Langmuir, El-Awady, Temkins and Flory Huggins adsorption isotherms.