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Influence of phosphate ion on the morphology, adhesion strength, and corrosion performance of zirconium-based surface treatment

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Abstract

In this study, the effect of phosphate ion (PO4 3−) was investigated on the different properties of a zirconium-based nanoceramic conversion layer. At the first step, the phosphate ion concentration was optimized using the DC polarization technique. In the next step, the surface morphological aspect of the bare and treated mild steel was evaluated utilizing field emission scanning electron microscopy technique. The results indicate formation of a composite conversion coating on the mild steel surface. Practical adhesion strength between treated mild steels and an epoxy resin was studied by pull-off adhesion test. Finally, the effect of phosphate ion on the corrosion properties of epoxy-coated mild steel was evaluated utilizing electrochemical impedance spectroscopy. It was revealed that the phosphate ion could increase both the adhesion strength and anticorrosion properties of the epoxy-coated substrate.

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Authors and Affiliations

  1. Polymer Engineering and Color Technology Department, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran

    A. Ghanbari & M. M. Attar

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  1. A. Ghanbari
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  2. M. M. Attar
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Correspondence to M. M. Attar.

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Ghanbari, A., Attar, M.M. Influence of phosphate ion on the morphology, adhesion strength, and corrosion performance of zirconium-based surface treatment. J Coat Technol Res (2015). https://doi.org/10.1007/s11998-015-9694-z

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  • DOI: https://doi.org/10.1007/s11998-015-9694-z

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