Sathiyapriya, A.R. and Muralidharan, V.S. and Subramanian, A. (2008) Development of Novel Acidizing Inhibitors for Carbon Steel Corrosion in 15% Boiling Hydrochloric Acid. Corrosion, 64 (6). pp. 541-552.

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Abstract

The inhibiUve action oj l-cinnamyLidine-3-thiocarbohydrazide (eTCH) and 1.1'-dicinnamyLidine-3-thiocarbohydrazide (DCTCH) against Lhe corrosion ojcarbon steel in 15% hydrochLoric acid (HCL) was investigated u.sing noneLectrochemicaL and eLectrochemicaL techniques. Potentiodynamic polarization studies revealed that the compounds were mixed-type inhibitors and exhibited more than 97% inhibition efficiency at 1.500 ppm oj inhibitor concentration. The effect of temperature on l/ lC corrosion behavior ojcarbon steel in 15% HCl with 1.500 ppm Ql'inhibitors was studied in the temperature range Jrom 30°C to 11 a°c. The sLLrfac coverage (8) increased linearLy witlt the Loqaritltm of the inhibitor concentrationjitting a Temkin adsorption isotherm. Thermodynamic parameters including theJree energy ojadsorption, activation energy. enthalpy. entropy. and heat ojudsoTption were also calcLLlated. The inhibitors reduced the hydrogen permeation current effectively through the st eL sttrface. The protective}ilmJormed on the metaL surface by the adsorption ojorganic compounds was confirmed using Fourier trans/om1injrared (FTIR). ttltravioLet (UV}-visibLe reflectancc. and scanning eLectron microscopy (SEM) studirs.

Item Type:	Article
Uncontrolled Keywords:	acidizing inhibitors; carbon steel; electrochemical studies; hydrochLoric acid; hydrogen permeation studies
Subjects:	Corrosion Science and Engineering
Divisions:	UNSPECIFIED
Depositing User:	ttbdu cecri
Date Deposited:	16 Jan 2012 11:38
Last Modified:	16 Jan 2012 11:38
URI:	http://cecri.csircentral.net/id/eprint/57

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