PLANTS EXTRACTS CORROSION INHIBITION OF ALUMINIUM ALLOY IN H2SO4
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SENRA Academic Publishers
Abstract
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Effects of tobacco (Nicotiana) and Kola tree (Cola acuminata) extracts on the corrosion inhibition of an aluminium
alloy 2S (1200) grade specimens immersed in 0.5M sulphuric acid was investigated at ambient temperature by
gravimetric and metallographic methods. Extracts of kola plant and tobacco in different concentrations were used as
‘green’ inhibitors. This paper reports the results obtained from the weight loss method, calculated corrosion rates,
inhibitor efficiencies and the optical microscopy metallographic observations. Addition of different concentrations of the
plants extracts gave clear reduction in weight loss and in the corrosion rate of the test samples. This apparent corrosion
inhibition was associated with the protective film provided on the aluminium alloy’s surface by the complex chemical
constituents of the plants extracts.
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TP Chemical technology