keywords: Cocos nucifera water, acid inhibitor, non-toxic inhibitor, mild steel
The inhibitive effect of Cocos nuciferal L. water (CW) as green corrosion inhibitor for acid corrosion of mild steel in 0.5 M H2SO4 solution has been studied using chemical technique. CW shows significant inhibition as corrosion inhibitor, with 84% efficiency at the highest concentration of the inhibitor. Amongst the Langmuir, Temkin and Frumkin isotherms, the adsorption of the inhibitor molecule onto metal surface accords with Langmuir adsorption isotherm.A first-order kinetics relationship with respect to mild steel was obtained with and without the Cocos nucifera L. water from the kinetics treatment of the data.