This paper utilizes the chromium alloy powders of several different particle sizes with narrow size distribution to deposit the coatings and collect the powders passing through high velocity oxy-fuel (HVOF) flame, which yielded different oxide contents. The corrosion resistance of a thermally sprayed chromium alloy layer is impaired by the oxides contained in the layer. The dependence of the layer oxide content of HOVF-chromium alloy layers on the particle size is closely linked to the dependency between application behavior and particle size. The physical process concerning with the oxidization during deposition of metallic coating through thermal spray process is still much lack of well understanding. The results show that the oxide content both in the layer and in the sprayed particles is extremely dependent on the particle size. As a result, the spray particle will be likely deposited into coating without further server oxidation after it impacts on substrate surface. Paper includes a German-language abstract.

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