Author/Authors :
Ayodele Ayoola, Ayodeji Chemical Engineering Department - Covenant University - P.M.B. 1023 - Ota - Ogun State, Nigeria , Rukayat Obanla, Oyinlola Chemical Engineering Department - Covenant University - P.M.B. 1023 - Ota - Ogun State, Nigeria , Grace Abatan, Oluwabunmi Chemical Engineering Department - Covenant University - P.M.B. 1023 - Ota - Ogun State, Nigeria , Isaac Fayomi, Ojo Sunday Mechanical Engineering Department - Covenant University - P.M.B. 1023, Ota - Ogun State, Nigeria - Surface Engineering Research Centre - Tshwane University of Tech - P.M.B. X680, South Africa , Akande, Itopa Godwin Mechanical Engineering Department - University of Ibadan - Ibadan - Oyo State, Nigeria , Agboola, Oluranti Chemical Engineering Department - Covenant University - P.M.B. 1023 - Ota - Ogun State, Nigeria , Augustine Ayeni, Omoniyi Chemical Engineering Department - Covenant University - P.M.B. 1023 - Ota - Ogun State, Nigeria , Oyekunle, Daniel Chemical Engineering Department - Covenant University - P.M.B. 1023 - Ota - Ogun State, Nigeria , Abiodun Olawepo, Victoria Chemical Engineering Department - Covenant University - P.M.B. 1023 - Ota - Ogun State, Nigeria , Oluwasayo Ayo- Aderele, Oyinkansade Chemical Engineering Department - Covenant University - P.M.B. 1023 - Ota - Ogun State, Nigeria
Abstract :
The corrosion inhibition performance of the natural honey in H2SO4 acidic medium containing mild steel and stainless steel, using weight loss and electrochemical techniques was investigated. The study involved the determination of the effects of the variation of the concentrations of natural honey inhibitor on the corrosion process. Potentiodynamic polarization for the electrochemical measurements was carried out by using Autolab PGSTAT 101 Metrohm potentiostat. Results obtained showed that increase in natural honey concentration (0–10 v/v%) retards the rate of metal dissolution and hence inhibits the corrosion of the metals. and the efficiency of the natural honey inhibitor increased with increased inhibitor concentration. The Tafel plots showed that the natural honey significantly decreased the corrosion potential (Ecorr) and current density (Jcorr); but increased the surface coverage (𝜃𝜃) and polarisation resistance. Adsorption and thermodynamics studies revealed that the Langmuir adsorption isotherm was obeyed and the large values of Δ𝐺𝐺𝑎𝑎𝑎𝑎𝑎𝑎obtained as well as its negative sign implied strong interaction and high efficiency of adsorption. SEM analysis of the metals (before and after corrosion) revealed significant reduction in corrosion rate as the concentrations of natural honey inhibitor increased.
Keywords :
Corrosion , Honey , Inhibitor , Mild steel , Stainless steel
