Corrosion and plants extracts inhibition of mild steel in HCl
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Corrosion and plants extracts inhibitive protection of mild steel specimens immersed in 0.5 M
hydrochloric 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 metallographic observations from metallurgical microscopy. Addition of different
concentrations of the plants extracts gave considerable reduction in the weight loss and in the
corrosion rate of the test samples. This apparent corrosion inhibition was associated with the
protective film provided on the steel’s surface by the complex chemical constituents of the plants
extracts. Effective protection of the mild steel was achieved more from the tobacco extract and also
from the extract of kola leaf
Keywords
T Technology (General), TJ Mechanical engineering and machinery