This project compared both
mechanically/manually extracted Musa paradisiaca stem
sap sample and Soxhlet extracted sample. The result of
the project shows that the average weight loss of the mild
steel generally increased with a corresponding increase
in time for both inhibited and uninhibited samples. Very
low corrosion rate values were observed with the
samples containing the inhibitor as compared to those
without any inhibitor for both methods of extraction.
Inhibition efficiency increased generally with increase in
inhibitor concentration with optimum efficiencies of
76.43% for the manually extracted sap and 87.07% for
the Soxhlet extracted sap. It was also established that
Langmuir adsorption model best fit the experimental
results with the manually extracted sample giving an RSquared value of 0.9933 and the Soxhlet extracted
sample giving an R-Squared value of 0.7331 after
comparison of four different adsorption isotherms
(Langmuir, Temkin, Freudlich and Florry-Huggins) at
room temperature (27°C). The results obtained showed
that the Soxhlet extracted sap was more efficient than
the mechanically extracted sap.
Keywords : Musa paradisiaca; stem sap; corrosion inhibitor; mild steel.