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Title: | Properties of ZnO/ZnAl<inf>2</inf>O<inf>4</inf> composite PEO coatings on zinc alloy Z1 | Authors: | Serdechnova, M. Blawert, C. Karpushenkov, S. Karpushenkava, L. Shulha, T. Karlova, P. Vasilić, Rastko Stojadinović, Stevan Stojanović, Vladimir Damjanović-Vasilić, Lj Heitmann, V. Rabchynski, S. M. Zheludkevich, M. L. |
Keywords: | Corrosion behaviour;Phosphate-aluminate electrolyte;Photocatalytic properties;Plasma electrolytic oxidation;Wear protection;Zinc alloy | Issue Date: | 25-Mar-2021 | Journal: | Surface and Coatings Technology | Abstract: | Recently the successful formation of PEO coatings on zinc alloy in a phosphate aluminate electrolyte was shown. The produced composite coatings contain various mixtures of ZnO and ZnAl2O4. In frame of the current study, the properties of the formed coatings including adhesion/cohesion, wear, corrosion and photocatalytic activity were analysed to identify possible applications. However, the coatings show internal porosity and a sponge-like structure. Thus the cohesion within the coating is quite low. Pull-off tests have demonstrated clear rupture within the PEO layer at strength values as low as 1 MPa. The photocatalytic activity is limited, in spite of the formation of a higher amount of ZnO at shorter treatment times. Interestingly, the composite coatings of ZnO and higher amounts of ZnAl2O4 spinel showed a higher activity, but not sufficient for fast and effective catalytic cleaning applications. |
URI: | https://physrep.ff.bg.ac.rs/handle/123456789/1029 | ISSN: | 0257-8972 | DOI: | 10.1016/j.surfcoat.2021.126948 |
Appears in Collections: | Journal Article |
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