Abstract
AbstractConvers(on coatings modified by deposits of alumina or zirconia have been studied as a way of improving the resistance to thermal oxidation of a 17Cr ferritic stainless steel. Conversion coatings, characterised by high porosity, facilitate the electrochemical deposition of alumina or zirconia layers and enhance their adhesion to the substrate. The resulting coats, after heating, possess compositional gradients which are favourable to strong adhesion. Alumina coatings are more effective than zirconia coatings in suppressing thermal oxidation of the steel.
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