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

N Santhini and T Jeyaraj

Abstract

Corrosion behavior of aluminium in 1.0N NaOH contai ning 3-(4-hydroxy-3-methoxy-phenyl)-1-Phenyl-propen one [HMPPP] was studied using chemical and electrochemi cal techniques. The protective effects of inhibitor have been investigated. The inhibition efficiency of the inhi bitor increased with the increasing concentration o f the inhibitor. The maximum inhibition efficiency was 63%. The res ults from weight loss and electrochemical methods a re in good agreement. But the inhibition efficiency decreased with the increase of temperature. The inhibitor was mixed type and it was found to obey Langmuir and El-Awady adso rption isotherms