Studies on the Inhibitive Action of Musa Paradisiaca Stem Extrude on Corrosion of Mild Steel in an Acidic Medium

Abstract

The corrosion rate of mild steel was monitored in sulphuric acid, using Musa paradisiaca stem extrude (MPSE) as corrosion inhibitor at temperatures of 303 and 333K. The corrosion rate and the inhibition efficiency were determined with gravimetric technique. Results reveals that Musa paradisiaca stem extrude could serve as a corrosion inhibitor of mild steel in acidic media. The inhibition efficiency of Musa paradisiaca stem extrudes (MPSE) recorded maximum values at lower temperature, increasing inhibitor concentration and decreasing concentration of corrodent. The sorption data gave adequate fit for Langmuir, Freundlich and Florry-Huggins isotherms. The Gibbs free energy ranged between   -4.488 to -3.237 kJmol^-1, activation energy ranged between 6.335 - 27.651kJ and the heat of adsorption ranged between - 2.282 to -2.776kJmol^-1. The results obtained shows that the inhibitive process is spontaneous, exothermic and a physisorption process.