Inhibition of 304 SS in Hydrochloric Acid Solution by N – Cyclohexyl – N′– Phenyl thiourea

Herle, Ramadev and Shetty, Prakash and Shetty, Divakara S and Kini, Achutha U (2010) Inhibition of 304 SS in Hydrochloric Acid Solution by N – Cyclohexyl – N′– Phenyl thiourea. In: International Journal of Contemporary Science, Engineering and Technology, 2010. (Submitted)

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Abstract

Stainless steel is used in various applications. Acid solutions are widely used for the removal of undesirable scale and rust in many industrial process. In such cases, the dissolution of metal/alloy can be controlled by addition of inhibitor. The inhibiting action of N - cyclohexyl – N′- phenyl thiourea (CPTU) on the corrosion behaviour of 304 SS in 1 N hydrochloric acid solution has been investigated using potentiostatic polarization technique at four different temperatures. The result obtained reveals 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 found to obey Temkeins’ adsorption isotherm and the inhibition is governed by physisorption mechanism. The thermodynamic parameters of adsorption deduced reveal a strong interaction and spontaneous adsorption of CPTU on the metal surface.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: 304 SS, Hydrochloric acid, Anodic inhibitor, Potentiostatic polarization.
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Engineering > MIT Manipal > Printing and Media
Depositing User: MIT Library
Date Deposited: 29 Jul 2011 06:17
Last Modified: 29 Jul 2011 06:17
URI: http://eprints.manipal.edu/id/eprint/1066

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