Issue 45, 2013
From the journal:

RSC Advances

Spectroscopic and DFT investigations on the corrosion inhibition behavior of tris(5-methyl-2-thioxo-1,3,4-thiadiazole)borate on high carbon steel and aluminium in HCl media

Ramalingam Tamilarasana  and  Anandaram Sreekanth*a  

* Corresponding authors

a Dept. of Chemistry, Centre of Excellence in Corrosion and Surface Engineering, National, Institute of Technology-Tiruchirappalli, Tiruchirappalli-620015, Tamil Nadu, India
E-mail: sreekanth@nitt.edu, sreekanth_a@yahoo.com

Abstract

The effect of tris(5-methyl-2-thioxo-1,3,4-thiadiazole)borate (HB(mtdaMe)3) on the corrosion of high carbon steel (HCS) and aluminium (Al) in HCl media has been examined by Electrochemical Impedance Spectroscopy (EIS), polarization (Tafel), Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Electronic spectroscopy and adsorption kinetics methods. The polarization studies show that HB(mtdaMe)3 acts as a cathodic inhibitor for HCS, while it is a mixed type inhibitor of predominantly the cathodic reaction in Al. The inhibition efficiency of the compound is very high and the SEM and XPS results have revealed that HB(mtdaMe)3 is adsorbed on the HCS and Al surface. The adsorption of HB(mtdaMe)3 on the HCS and Al surface obeys the Langmuir adsorption isotherm. DFT calculations were used to gain insight into the structural and electronic properties in relation to the inhibition efficiency.

Graphical abstract: Spectroscopic and DFT investigations on the corrosion inhibition behavior of tris(5-methyl-2-thioxo-1,3,4-thiadiazole)borate on high carbon steel and aluminium in HCl media

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Article information

DOI
https://doi.org/10.1039/C3RA43681K
Article type
Paper
Submitted
16 Jul 2013
Accepted
05 Sep 2013
First published
09 Sep 2013

RSC Adv., 2013,3, 23681-23691

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Spectroscopic and DFT investigations on the corrosion inhibition behavior of tris(5-methyl-2-thioxo-1,3,4-thiadiazole)borate on high carbon steel and aluminium in HCl media

R. Tamilarasan and A. Sreekanth, RSC Adv., 2013, 3, 23681 DOI: 10.1039/C3RA43681K

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