Aluminum 6061 Alloy Modification with Micro Arc Oxidation and Ferric Oxide Nanoparticles Incorporated to Reduce Aluminum Corrosion

Document Type : Original Article

Authors

1 Department of Chem., College of science, Baghdad University, Baghdad, Iraq, Iraq

2 Department of Chem., College of science, Baghdad University, Baghdad, Iraq

Abstract

The MAO approach was used to create incorporation coatings containing Fe3O4 nanoparticles on an Aluminium 6061 (A6061) alloy. The effect of nanoparticles on the microstructure and corrosion resistance of produced ceramic composite coatings, as well as the method of their assimilation into the MAO layer, were investigated. Fe3O4 nanoparticles were added to an electrolyte solution of its components (10 g/L KH2PO4 + 2g/L NaOH), and a high variable AC voltage of 150 volts is applied, to produce MAO composite coatings, a titanium sheet was employed as a counter electrode. Electrochemical impedance spectroscopy (EIS) and polarization experiments were also used to investigate corrosion protection, revealing a strong corrosion protection effectiveness even at temperatures ranging from 298k to 328 K in a saline medium. Where the corrosion current density increase with the increase in temperature. The activation energy and the pre-exponential factor (kinetic parameters) were computed and explained. Furthermore, the thermodynamic values ΔG* and ΔH* were estimated. The impact of nanoparticles on phase composition was investigated using X-ray diffraction (XRD) techniques. Furthermore, scanning electron microscopy (SEM) images indicated the ability of Fe3O4 nanoparticles to fill the inherent pores of MAO coatings.

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History

  • Receive Date: 19 July 2022
  • Revise Date: 01 August 2022
  • Accept Date: 29 August 2022

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