Chromium compounds, coatings industry

The diffusion coatings on metals basis for improvement the corrosion resistance of steels have a wide industrial ap>plication. The main aim of the thermochemical treatment in this case is to form on the steel surface a layer from metals with high corrosion resistance, their solid solution in the metal matrix, or their compounds. The metals that are usually used for this thermochemical treatment are chromium, aluminium and zinc. 

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