The inhibiting effect of N - cyclohexyl - N?- phcnyl thiourea (CPTU) and N-naphthyl-N?- phenyl thiourea (NPTU) on the corrosion of mild steel in aqueous solution of 0.1 N H<inf>2</inf>SO<inf>4</inf> have been demonstrated using potentiodynamic polarization technique. The polarization data have shown that these compounds act as efficient anodic inhibitors for mild steel. Adsorption of these compounds on the mild steel surface was found to obey Temkin's adsorption isotherm. Good inhibition efficiency (IE) was evidenced in both the compounds and it was found to vary with concentration of the inhibitors. The kinetic parameters of adsorption obtained reveal spontaneous adsorption and a strong interaction of the compounds on the mild steel surface. © 2006 SAEST.
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Date
Inhibition of mild steel corrosion in sulphuric acid solution
Journal Title
Journal ISSN
Volume Title
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Abstract
2006
Description
Keywords
Activation energy, Adsorption isotherms, Corrosion inhibitors, Inorganic acids, Solutions, Steel corrosion, Corrosion inhibition, Electrosorption valency, Inhibition efficiency, Sulphuric acid, Carbon steel
Citation
Transactions of the SAEST (Society for Advancement of Electrochemical Science and Technology), 2006, 41, 1, pp. 23-27