Evaluation of Codiaeum Variegatum Brilliantissima – Zanzibar as an Inhibitor of Mild Steel Corrosion in 1 M HCl Using Gravimetric Method

Evaluation of the Corrosion inhibition effect of aqueous extract of Codiaeum Variegatum Brilliantissima – Zanzibar (Wire Croton) on mild steel corrosion in an environment of 1 M HCl base stock solution was studied using gravimetric measurement. The work evaluated the effect of immersion time and concentration of inhibitor on the performance of crude extract of CVB-WC as an inhibitor of mild steel corrosion in 1 M HCl environment. The result showed that the surface coverage was close to unity indicating an effective inhibitor with a high inhibition efficiency of 96 – 99%. It is also established that CVB-WC inhibition action is dependent on concentration and time of immersion. Furthermore, the weight loss results are in consonance with the established facts that CVB-WC has compounds that contain –OH, -HN2, – COOH, -COOC2H5, functional groups and heteroatoms, N, O, P that provide the linking bridge to physisorption and chemisorption adsorption processes.