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Vol. 33 No. 12 (2021): Vol 33 Issue 12, 2021

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Corrosion Inhibition of Carbon Steel using Dipropyl Sulphide as Inhibitor System in Sulphuric Acid Solution

https://doi.org/10.14233/ajchem.2021.23515
P. Vijayakumar
P.G. and Research Department of Chemistry, H.H. The Rajah’s College (Autonomous) (Affiliated to Bharathidasan University), Pudukkottai-622001, India
S. Valarselvan
P.G. and Research Department of Chemistry, H.H. The Rajah’s College (Autonomous) (Affiliated to Bharathidasan University), Pudukkottai-622001, India
S.S. Syed Abuthahir
P.G. and Research Department of Chemistry, Jamal Mohamed College (Autonomous), (Affiliated to Bharathidasan University), Tiruchirappalli-620020, India

Corresponding Author(s) : S. Valarselvan

svalarselvan@gmail.com

Asian Journal of Chemistry, Vol. 33 No. 12 (2021): Vol 33 Issue 12, 2021

Abstract

The corrosion inhibition effect of dipropyl sulphide (DPS) on carbon steel immersed in 0.5 N sulphuric acid has been evaluated at room temperature using mass loss method. The corrosion rate and inhibition efficiency was obtained from weight loss method. The corrosion inhibition efficiency increases with increase in concentration of an inhibitor. The corrosion rate decreases when increase in concentration of inhibitor. This is due to the higher concentration of inhibitor solution, which blocks the active site of a carbon steel and a protective film is formed on the carbon steel surface. Electrochemical studies have been used to confirm the formation of protective film over the carbon steel surface. This is further confirmed by surface analysis technique like FTIR spectroscopy and scanning electron microscopy. Energy dispersive analysis of X-ray was used to analyze the elements present over the carbon steel surface. Surface analysis of polished, corroded and inhibitor carbon steel surface has been evaluated by SEM. In order to study adsorption of dipropyl sulphide on carbon steel, in situ atomic force microscopy (AFM) measurements were performed in control, with and without dipropyl sulphide in 0.5 N H2SO4 solution.

Keywords

Acidic solutions Carbon steel corrosion Dipropyl sulphide Scanning electron microscopy Mass loss method
Vijayakumar, P., Valarselvan, S., & Syed Abuthahir, S. (2021). Corrosion Inhibition of Carbon Steel using Dipropyl Sulphide as Inhibitor System in Sulphuric Acid Solution. Asian Journal of Chemistry, 33(12), 3115–3122. https://doi.org/10.14233/ajchem.2021.23515
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