Journal of Engineering and Applied Sciences

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Double-Layer Coatings for Surface Improvement of Al 6061 Alloys by Anodizing and Micro Plasma Oxidation Process MPO using New Hydroxy Apatite and Rock Additives Modified Electrolytes

Samir Hamid Awad
Page: 3112-3121 | Received 21 Sep 2022, Published online: 21 Sep 2022

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Abstract

In this research, duplex ceramic coatings were deposited on Al 6061 alloy, using anodizing and Micro Plasma process (MPO). MPO electrolyte was modified using hydroxy apatite and 15 g L^–1 rock additives rich with Calcium Carbonate (CaCo₃). Phase composition of the coatings, micro structure, micro-hardness, topography, thickness, roughness and wear resistance were evaluated by X-Ray Diffraction (XRD), (SEM), a Vickers indenter, AFM and Microprocessor coating thickness meter, roughness test and Micro test, respectively. Results showed that the samples coatings contained γ-alumina and their thickness and hardness increased by the increasing of deposition time. The research demonstrates that a relatively hard, thick and uniform coatings with good wear resistance, can successfully be deposited on Al alloy using hydroxy apatite and 15 g L^–1 CaCo₃ rock additives containing electrolytes as an natural rock additives.

How to cite this article:

Samir Hamid Awad. Double-Layer Coatings for Surface Improvement of Al 6061 Alloys by Anodizing and Micro Plasma Oxidation Process MPO using New Hydroxy Apatite and Rock Additives Modified Electrolytes.
DOI: https://doi.org/10.36478/jeasci.2020.3112.3121
URL: https://www.makhillpublications.co/view-article/1816-949x/jeasci.2020.3112.3121