Corrosion inhibition potentials of Roselle (Hibiscus sabdariffa) in tetraoxosulphate (VI) acid solution
Keywords:Corrosion, Inhibition, Roselle (Hibiscus sabdariffa), Inhibition efficiency, Tetraoxoxulphate (VI) acid
The harmful effects of chemical based corrosion inhibitors on man and the ecosystem prompted the search for alternatives that are non hazardous to the environment.Therefore, the corrosion inhibition potentials of the leaves and flowers of the green variety of Roselle (Hibiscus sabdariffa) were evaluated.This was undertaken mainly to investigate the effectiveness of the leaves and flowers of Roselle in mitigating the corrosion of mild steel in acidic medium. The gravimetric method of corrosion measurement was used to evaluate the corrosion inhibition potentials of the plant parts. The results showed that the leaves and flowers of the plant can effectively be used to mitigate the corrosion of metals in acidic medium. The maximum inhibition efficiencies of the leaves and flower extracts of the plant were 27.94 % and 22.81 % respectively. The leaves and flowers of the plant were more efficient on the first eight days of application.
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