Comparative Studies Of Corrosion Inhibition Of Methanol Extract Of Senna Occidentalis On Mild Steel In Sulphuric And Hydrochloric Acids


  • Abubakar Sani Department of Pure and industrial Chemistry, Faculty of Natural and Applied Sciences, Umaru Musa Yar’adua University, Dutsin-ma Road, P.M.B,2218, Katsina, Nigeria
  • Sani Uba Department of of chemistry, Ahmadu Bello University, Zaria-Nigeria
  • Aishat Abdulwahab Department of of chemistry, Ahmadu Bello University, Zaria-Nigeria


Methanol extract, corrosion inhibition, Senna Occidentalis, Mild Steel


The study of corrosion inhibition of senna occidentalis methanol extract on mild steel in 0.5M, 1M and 1.5M HCl and H2SO4 was carried out by adsorption isotherm studies using gravimetric method. The corrosion rate of mild steel coupon in the plant extract was found to decrease with immersion time (2-6 hours) and with increase in concentration of inhibitor (400ppm-800ppm).
The result further showed an increase in inhibition efficiency of the inhibitor up to 313k indicating an adsorption of extracts on the mild steel surface. The adsorption on mild steel was found to obey the Langmuir adsorption isotherm.