Properties of ZnO/ZnAl$_2$O$_4$ composite PEO coatings on zinc

Recently the successful formation of PEO coatings on zinc in a phosphate aluminate electrolyte was shown. The produced composite coatings contain various mixtures of ZnO and ZnAl$_2$O$_4$. In frame of the current study, the properties of the formed coatings including adhesion/cohesion, wear, corrosi...

Full description

Saved in:
Bibliographic Details
Main Authors Serdechnova, M, Blawert, C, Karpushenkov, S, Karpushenkava, L, Shulha, T, Karlova, P, Vasilic, R, Stojadinovic, S, Stojanovic, S, Damjanovic-Vasilic, Lj, Heitmann, V, Rabchynski, S. M, Zheludkevich, M. L
Format Journal Article
LanguageEnglish
Published 27.10.2022
Subjects
Physics - Materials Science
Online AccessGet full text

Cover

More Information
Summary:Recently the successful formation of PEO coatings on zinc in a phosphate aluminate electrolyte was shown. The produced composite coatings contain various mixtures of ZnO and ZnAl$_2$O$_4$. 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 ZnAl$_2$O$_4$ spinel showed a higher activity, but not sufficient for fast and effective catalytic cleaning applications.
DOI:10.48550/arxiv.2210.15443