Inhibition of corrosion of mild steel by an alcoholic extract of a seaweed Sargassum muticum

Suyambulingam Jone Kirubavathy; Hashem Abdulhameed Al; Rajendran Susai Santhammal; R.M. Joany; Časlav Lačnjevac

doi:10.5937/zasmat2104304J

Authors

Suyambulingam Jone Kirubavathy PSGR Krishnammal College for Women, Department of Chemistry, Coimbatore, India Author
Hashem Abdulhameed Al Kuwait Institute for Scientific Research, Petroleum Research Centre, Kuwait Author
Rajendran Susai Santhammal St. Antony's College of Arts and Sciences for Women Thamaraipadi, Corrosion Research Centre, PG Department of Chemistry, Tamil Nadu, India + Pondicherry University, India Author
R.M. Joany Sathyabama University, Department of ECE, Jeppiaar Nagar, Chennai, Tamil Nadu, India Author
Časlav Lačnjevac University of Belgrade, Faculty of Agriculture, Serbia Author

DOI:

https://doi.org/10.5937/zasmat2104304J

Keywords:

corrosion inhibition, mild steel, sea weed, Sargassum muticum, electrochemical studies, Langmuir adsorption isotherm, acid medium

Abstract

An alcoholic extract of a sea weed Sargassum muticum has been used to control corrosion of mild steel in 0.5 N HCl. Weight loss method and Electrochemical studies have been used in this study. Weight loss study reveals that 500 ppm of the inhibitor offers 99.25 % inhibition efficiency. Polarization study reveals that the inhibitor functions as an anodic inhibitor at higher concentration. The AC impedance spectra confirm the formation of a protective film on the metal surface. Adsorption of inhibitor molecules on the metal surface follows Langmuir adsorption isotherm.

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