1-Butyl-3-methylimidazolium methane sulfonate ionic liquid corrosion inhibitor for mild steel alloy: Experimental, optimization and theoretical studies
Daniel Iheanacho Udunwa,
Okechukwu Dominic Onukwuli,
Mathew Chukwudi Menkiti,
Valentine Chikaodili Anadebe,
Maduabuchi Arinzechukwu Chidiebere
Affiliations
Daniel Iheanacho Udunwa
Department of Polymer and Textile Engineering, Federal University of Technology, Owerri, Imo State, Nigeria; Department of Chemical Engineering, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria; Corresponding author. Department of Polymer and Textile Engineering, Federal University of Technology, Owerri, Imo State, Nigeria.
Okechukwu Dominic Onukwuli
Department of Chemical Engineering, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria; Corresponding author. Department of Chemical Engineering, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria.
Mathew Chukwudi Menkiti
Department of Chemical Engineering, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria
Valentine Chikaodili Anadebe
Corrosion and Materials Protection Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630003, Tami Nadu, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India; Department of Chemical Engineering, Alex Ekwueme Federal University, Ndufu Alike, P.M.B. 1010, Abakaliki, Ebonyi State, Nigeria; Corresponding author. Corrosion and Materials Protection Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630003, Tami Nadu, India.
Maduabuchi Arinzechukwu Chidiebere
Department of Science Laboratory Technology, Federal University of Technology, Owerri, Imo State, Nigeria
The current research reports the performance of 1-butyl-3-methylimidazolium methane sulfonate ([C4MIM][OMs](IL)) as effective corrosion inhibitor for mild steel in 1 M H2SO4 electrolyte. For proper evaluation, weight loss, electrochemical study, theoretical modeling and optimization techniques were used. Weight loss and electrochemical methods shows that the inhibition performance of [C4MIM][OMs] on the metal surface strengthens as the concentration increases. Maximum inhibition efficiency of 85.71%, 92.5% and 91.1% at 0.8 g L-1 concentration of [C4MIM][OMs] were obtained from the weight loss, polarization and impedance studies, respectively. In addition, response surface methodology (RSM) a statistical tool was used for modeling and optimization of the empirical data. The RSM model validates the empirical findings. Also, DFT/MD-simulation investigations evidenced that [C4MIM][OMs] forms a barrier film on the mild steel surface. The result shows that the synthesized [C4MIM][OMs] could open up opportunities in corrosion and materials protection for sustainability.
