Hydrazinecarbothioamide Derivative as an Efective Inhibitor for Corrosion Control: Electrochemical, Surface and Theoretical Studies

Manjunath, B and Pais, Mikitha and Kumari, Preethi P and Rao, Suma (2022) Hydrazinecarbothioamide Derivative as an Efective Inhibitor for Corrosion Control: Electrochemical, Surface and Theoretical Studies. Journal of Bio- and Tribo-Corrosion, 8 (5). ISSN 2198-4220

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Abstract

Aluminium has played a signifcant role in the advancement of metal matrix composites (MMC) and has drawn the attention of researchers since Al composites fnd extensive application in aerospace, military and automobile industries. This paper describes the corrosion property of 6061 Al-15 vol%. SiC(p) composites in hydrochloric acid medium. This composite with high strength-to-weight ratio and other alluring properties undergoes corrosion in acid media and a study has been made in 0.5 M hydrochloric acid using (2Z)-2-(2-hydroxy-3methoxybenzylidene) hydrazinecarbothioamide (HCT) as an inhibitor. Results of the electrochemical studies and surface morphology are presented. With the increase in HCT concentration, inhibi�tion efciency increased. But efciency decreased with an increase in temperature. The maximum efciency was found to be 56.8% for the addition of 10× 10–5 M HCT concentration at 303 K. The inhibitor was found to behave as a mixed inhibitor afecting both anodic metal dissolution reaction and cathodic hydrogen evolution to the same extent. The HCT molecules were found to physisorb over the Al-composite surface and adsorption followed Langmuir’s adsorption isotherm. Adsorp�tion of HCT was confrmed by scanning electron microscopy (SEM) and atomic force microscopy (AFM). Computational studies using density functional theory (DFT) supported experimental fndings. Density functional theory calculations gave a clear insight into the mechanistic aspects of corrosion inhibition

Item Type: Article
Uncontrolled Keywords: 6061 Al-15 vol% SiC(p) composite · Acid corrosion · Hydrazide · Electrochemical studies · Surface morphology · Density functional theory
Subjects: Engineering > MIT Manipal > Chemistry
Depositing User: MIT Library
Date Deposited: 23 Jun 2022 10:28
Last Modified: 23 Jun 2022 10:28
URI: http://eprints.manipal.edu/id/eprint/158882

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