FIELD TESTS ON THERMALLY SPRAYED ZINC-(ALUMINIUM)- COATINGS ON STEEL
Manuela Zecho, Ulf Nürnberger, Klaus Menzel
Otto-Graf-Journal: Annual Journal on Research and Testing of Materials
Abstract
To estimate the corrosion protective effect of zinc spray coatings, produced by means of modern technologies in comparison with hot-dip galvanised coatings, tests were conducted under a variety of test conditions. ZnAl 15 spray coatings were also examined to obtain a direct comparison with frequently observed improved corrosion resistance of hot-dipped aluminium containing zinc coatings. The investigations show, that using modern spraying techniques an improved corrosion resistance of zinc-spray...Moreed coatings is possible to achieve. In a lot of media it can be selected equally between zinc sprayed and hot-dip galvanized coatings. Furthermore, it was also revealed that, in many situations, ZnAl 15 spray coatings produce a considerably improved corrosion resistance than zinc coatings.
keywords:Corrosion; Zinc; Aluminium; Coatings; Thermal spraying; zinc-aluminium; galvanised steel
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