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

Mikitha Pais, Padmalatha Rao

Research output: Contribution to journalArticlepeer-review

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 measurements and electrochemical impedance spectroscopy technique. Conditions were optimised to get maximum inhibition efficiency 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 inhibition efficiency increased with the temperature and inhibitor concentration. Maximum inhibition efficiency was found to be 62.3% for the addition of 0.4 g L−1 MLD. Theoretical calculations confirmed the experimental observations.

Original languageEnglish
Article number115
JournalJournal of Bio- and Tribo-Corrosion
Volume6
Issue number4
DOIs
Publication statusPublished - 01-12-2020

All Science Journal Classification (ASJC) codes

  • Materials Science (miscellaneous)
  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Chemistry

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