화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.20, No.5, 3612-3622, September, 2014
DOI10.1016/j.jiec.2013.12.056  Export Citation
Inhibition of mild steel corrosion in acidic medium using coconut coir dust extracted from water and methanol as solvents
S.A. Umoren†, I.B. Obot, A.U. Israel, P.O. Asuquo, M.M. Solomon, U.M. Eduok, and A.P. Udoh
  • Materials and Corrosion Protection Research Laboratory, Department of Chemistry, Faculty of Science, University of Uyo, Uyo, Nigeria
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Corrosion inhibition of mild steel in H2SO4 by water and methanol extracts of coconut coir dust was studied using chemical and electrochemical techniques. It was found that the extracts inhibited the acid induced corrosion of mild steel. The inhibition efficiency increased with increase in extracts concentration but decreased with increase in temperature. Methanol extract was found to be a better inhibitor. The adsorption of the extracts’ components onto the mild steel surface follow Temkin and Freundlich adsorption isotherms for methanol and water extracts respectively. Polarization studies show that the extracts act as mixed typed inhibitor but under cathodic control.
Keywords:Acid corrosion;Mild steel;Corrosion inhibition;Coconut coir dust
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