Influence of multilayered polymer coatings on the corrosion behaviour and microstructures of Al6061-T6 alloy

Temitope Olumide Olugbade (Lead / Corresponding author)

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The influence of multilayered polymer coatings on the corrosion and microstructural properties of Al6061-T6 alloy was investigated. The electrochemical properties were determined in chloride solution via corrosion tests and electrochemical impedance spectroscopy (EIS) technique at room temperature. The microstructural properties and corrosion mechanism after polarization were studied by scanning electron microscopy (SEM) and atomic force microscopy (AFM)/Kelvin probe force microscopy (KPFM) techniques. From the corrosion tests and SEM-AFM/KPFM analysis, the multilayered polymer coated (using polyacrylic acid - PAA) Al6061-T6 alloy experienced a positive shift in the corrosion potential (-0.648 V), signifying a possible corrosion protection ability. With a charge transfer resistance of 2.506×10−6 Ω cm2, and lesser corrosion products featured on the coated sample, the present work demonstrates that the deposition of multilayered polymer PAA coating can enhance the corrosion resistance of Al6061-T6 alloy.

Original languageEnglish
Article number133901
Number of pages6
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume692
Early online date4 Apr 2024
DOIs
Publication statusPublished - 5 Jul 2024

Keywords

  • Al6061-T6 alloy
  • Coatings
  • Corrosion
  • Microstructures
  • Passivation

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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