Electrochemical Approaches for Material Conservation: Experimental and Theoretical Insights Using a Biopolymer

Pais, Mikitha and Padmalatha, * (2020) Electrochemical Approaches for Material Conservation: Experimental and Theoretical Insights Using a Biopolymer. Journal of Bio- and Tribo-Corrosion, 6 (115). ISSN 2198-4220

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Abstract

Maltodextrin (MLD) is introduced as a novel, potent green inhibitor for the corrosion control of zinc in 0.1 sulfamic acid. The corrosion and inhibition studies were done by electrochemical techniques such as potentiodynamic polarisation meas�urements and electrochemical impedance spectroscopy technique. Conditions were optimised to get maximum inhibition efciency by varying the concentration of the inhibitor in the temperature range of 303–323 K. Activation and thermodynamic parameters were evaluated and discussed in detail. Suitable mechanism was proposed for corrosion and inhibition process. Surface characterisation was done by SEM, EDX and AFM techniques before and after the addition of inhibitor. The density functional theory calculations were performed and compared with experimental observations. Results indicated that inhibi�tion efciency increased with the temperature and inhibitor concentration. Maximum inhibition efciency was found to be 62.3% for the addition of 0.4 g L−1 MLD. Theoretical calculations confrmed the experimental observations.

Item Type: Article
Uncontrolled Keywords: s Carbohydrate polymer · Material conservation · Sulfamic acid · Electrochemical studies · Surface morphology · Theoretical calculations
Subjects: Engineering > MIT Manipal > Chemistry
Depositing User: MIT Library
Date Deposited: 23 Apr 2021 09:41
Last Modified: 23 Apr 2021 09:41
URI: http://eprints.manipal.edu/id/eprint/156722

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