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Experimental and Theoretical Studies for Tobacco Leaf Extract as an Eco-friendly Inhibitor for Steel in Saline Water

Authors
  • Abod, Baker M.1
  • Al-Alawy, Ramy M.1
  • Khadom, Anees A.2
  • Kamar, Firas H.1
  • 1 Institute of Technology, Middle Technical University, Baghdad, Iraq , Baghdad (Iraq)
  • 2 University of Diyala, Chemical Engineering Department, College of Engineering, Baquba, Diyala, Iraq , Baquba (Iraq)
Type
Published Article
Journal
Journal of Bio- and Tribo-Corrosion
Publisher
Springer International Publishing
Publication Date
Jul 16, 2019
Volume
5
Issue
3
Identifiers
DOI: 10.1007/s40735-019-0268-y
Source
Springer Nature
Keywords
License
Yellow

Abstract

Corrosion control of mild steel in seawater solution using Tobacco Leaf Extract (TLE) is investigated at different inhibitor concentration and temperature by weight loss method. Inhibitor performance increases with a decrease in temperature and increases with the rise of inhibitor concentration. Adsorption acts in accordance with Freundlich adsorption isotherm, having negative values of adsorption in high temperature, signifying a spontaneous and stable course of inhibition. In order to construct a relationship between the corrosion percentage data and independent variables, mathematical models were proposed with high correlation coefficients. Following the AM1-SCF method, quantum chemistry specifications of inhibitor were computed, for activation of the adsorption of the TLE molecules on the steel exterior.

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