Electrochemical and physicochemical studies for adsorption of Bovine serum albumin for corrosion mitigation of zinc

Mikitha Pais, Padmalatha Rao

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Work deliberated here intended to study protection of sulfamic acid (NH2SO3H) induced corrosion of zinc using a biopolymer Bovine serum albumin (BSA). The efficacy of BSA was studied by potentiodynamic polarization measurements (PDP) and electrochemical impedance spectroscopy (EIS). Experimental parameters like concentration of NH2SO3H (0.1 M and 0.25 M), BSA (0.05–0.25 gL-1) and temperature (303 K–323 K) were varied to achieve maximum inhibition efficiency. Various adsorption isotherm models were tried and tested to understand the mode of adsorption. Adsorption of BSA was reaffirmed by surface (SEM, EDX, AFM) and spectroscopic (UV–Visible, AAS, FT-IR) studies. The inhibition efficiency increased with increased temperature, inhibitor concentration and acid concentration. A maximum of 89.1% inhibition efficiency was achieved at the concentration of 0.25 gL-1 BSA at 323 K in 0.25 M NH2SO3H. Thermodynamic calculations revealed the possibility of both physical and chemical adsorption of BSA on zinc. A suitable mechanism was predicted for the corrosion and inhibition process. BSA emerged as an excellent green inhibitor.

Original languageEnglish
Article number126034
JournalMaterials Chemistry and Physics
Volume283
DOIs
Publication statusPublished - 01-05-2022

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Electrochemical and physicochemical studies for adsorption of Bovine serum albumin for corrosion mitigation of zinc'. Together they form a unique fingerprint.

Cite this