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Abstract

The main objective of this study is to investigate the corrosion inhibition properties of Gardenia aqualla leaf extract on mild steel using weight loss method. The corrosion of mild steel was investigated at different concentrations of G. aqualla and also at different temperatures (303, 313 and 323 K). G. aqualla inhibits the corrosion rate of mild steel from 62.4 mm/yr to 6.5mm/yr, 91.6 mm/yr to 16.6 mm/yr and 113.8 mm/yr to 28.4 mm/yr at 303, 313 and 323 K, respectively, which yielded an optimum result in the values of inhibition efficiency from 63.8 to 89.5 %, 52.5 to 81.9 % and 39 to 75 % for the various temperatures after an interval of 3 days after being in  contact with its respective environment. The Langmuir isotherm confirmed that physisorption occurred. It was found that inhibition occurred through adsorption of constituents present in the leaf of G. aqualla obtained by the phytochemical screening.

Keywords

Adsorption Phytochemical screening Mild steel Corrosion inhibition Gardenia aqualla

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Copyright (c) 2018 Opara Ivan, Japari Joseph, Pigwe Amos Isa, Tonny Nyong'a Maraga, Louis Hitler

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