Inhibiting Effect of N-cyclohexyl-N0-phenyl Thiourea on the Corrosion of 304 SS in Hydrochloric Acid Solution

Herle, Ramadev and Shetty, Divakara S and Kini, Achutha U and Shetty, Prakash (2011) Inhibiting Effect of N-cyclohexyl-N0-phenyl Thiourea on the Corrosion of 304 SS in Hydrochloric Acid Solution. Chemical Engineering Communications, 198 (1). pp. 120-130. ISSN 0098-6445

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Abstract

The inhibiting action of N-cyclohexyl-N0-phenyl thiourea (CPTU) on the corrosion behavior of 304 SS in 3M hydrochloric acid solution has been investigated using potentiodynamic polarization technique at four different temperatures. The results obtained reveal that CPTU acts as an efficient anodic inhibitor for the corrosion of 304 SS. Good inhibition efficiency (>92%) was evident in the acidic solution, and it was found to vary with temperature and concentration of the inhibitor. The adsorption of this compound on the 304 SS surface was found to obey the Temkin adsorption isotherm, and the inhibition was governed by physical adsorption mechanism.The thermodynamic parameters of adsorption deduced revealed a strong interaction and spontaneous adsorption of CPTU on the steel surface. Scanning electron microscopic study (SEM) was done to investigate the surface characterization of inhibited and uninhibited 304 SS specimens.

Item Type: Article
Uncontrolled Keywords: 304 SS; Activation energy; Anodic inhibitor; Hydrochloric acid;Inhibition
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Engineering > MIT Manipal > Printing and Media
Depositing User: MIT Library
Date Deposited: 27 Jul 2011 06:11
Last Modified: 27 Jul 2011 06:11
URI: http://eprints.manipal.edu/id/eprint/939

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