Development and performance of hybrid coatings on aluminium alloy

Authors

  • Makanjuola Oki Landmark University
  • Adesoji Adeolu Adediran Landmark University
  • Olayinka Saheed Landmark University
  • Ogunsola Opeyemi Landmark University

DOI:

https://doi.org/10.5599/jese.347

Keywords:

adhesion, SEM/EDX, permanganate, glycerol, morphology, pitting
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Abstract

From gravimetric studies, hybrid nano-coatings, based on permanganate/fluo­ride/gly­cerol conversion coating solutions formed on aluminum alloy by immersion procedures developed rapidly at a rate which decreased with time of treatment and was about 16 mg in weight after a period of three minutes. The morphology of the coating during scanning electron microscopic (SEM) examinations revealed randomly shaped coating materials with mud cracking patterns, characteristics of dried out coatings derived from gel-like materials. Analyses of the coating using EDX attachment in the SEM showed that it was composed essentially of aluminum, oxygen and manganese compounds, probably hydrated. The corrosion resistance of the coating out-performed ‘bare’ aluminum alloy specimens exposed to natural environment and 1 M sodium chloride solution. The coating improved the paint adhesion characteristics of the substrate aluminum alloy.


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Published

15-08-2017

How to Cite

Oki, M., Adediran, A. A., Saheed, O., & Opeyemi, O. (2017). Development and performance of hybrid coatings on aluminium alloy. Journal of Electrochemical Science and Engineering, 7(3), 131–138. https://doi.org/10.5599/jese.347

Issue

Vol. 7 No. 3 (2017)

Section

Electrochemical Engineering

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