Abstract

---

The inhibitive action of Xanthosoma spp Leaf extracts (XLE) on the corrosion of copper in seawater has been studied using the weight loss technique. Various concentrations (1%,2%,3%,4% and 5% v/v) of XLE were used at temperatures 303, 313, 323 and 333K.The inhibition efficiency was found to increase with increasing inhibitor concentration. The effect of temperature on the corrosion inhibition of copper indicated an increase in the corrosion rate as temperature increased and subsequent decrease in the inhibition efficiency. Highest inhibition efficiency of 85% was obtained at 300K with inhibitor concentration 5%v/v and the least inhibition efficiency of 18.11% at 333K with inhibitor concentration 1%v/v. Thermodynamic data calculated are suggestive of adsorption of inhibitor molecules on metal surface. Experimental data fitted into Langmuir’s adsorption isotherm. Once again a common weed shows potential as corrosion inhibitor for copper in an aggressive corrosive environment

---