Corrosion Inhibition of Stainless Steel in Hydrochloric Acid by N - (2-mercaptophenyl) -N/ -phenyl Thiourea

Herle, Ramadev and Shetty, Prakash and Shetty, Divakara S and Kini, Achutha U (2011) Corrosion Inhibition of Stainless Steel in Hydrochloric Acid by N - (2-mercaptophenyl) -N/ -phenyl Thiourea. International Journal of Chemistry and Applications, 3 (2). pp. 151-158. ISSN 0974-3111

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Abstract

The inhibition effect of N - (2-mercaptophenyl) -N/ - phenyl thiourea (MPTU) on the corrosion of 304 SS in 2 N HCl medium has been investigated by potentiodynamic polarization and weight loss methods. The results obtained reveal that MPTU is an efficient mixed inhibitor with efficiency of greater than 92% in the temperature range studied. The adsorption of this inhibitor on the 304 SS surface obeys Temkeins adsorption isotherm, and the inhibition is governed by physisorption mechanism. The influence of parameters like temperature and inhibitor concentration on the corrosion rate of 304 SS has also been investigated. The thermodynamic parameters deduced for the adsorption process reveal a strong interaction and spontaneous adsorption of MPTU on the alloy steel surface.

Item Type: Article
Uncontrolled Keywords: 304 SS, Hydrochloric acid, Mixed inhibitor, Potentiodynamic polarization, Adsorption, Activation energy
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Engineering > MIT Manipal > Printing and Media
Depositing User: MIT Library
Date Deposited: 22 Jul 2011 11:22
Last Modified: 22 Jul 2011 11:22
URI: http://eprints.manipal.edu/id/eprint/931

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