ChemInform Abstract: Protective Coatings Obtained by Laser Treatment of the Low Alloyed Ferritic Steel 35 NCD 16.
Abstract
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ChemInform Abstract
Coating of Fe-0.38% C-1.8% Cr-4% Ni steel with an acetone suspension of Cr3C2 followed by laser treatment and optionally coating with a second layer of SiC and subsequent laser treatment significantly increases the oxidation reistance of the steel. In the case of Cr3C2 coating the protection is due to formation of a layer of FeCr2O4 spinel at the interface of the metal and an (Fe,Cr)2O3 oxide layer covered by an external Fe2O3 layer formed in an oxidizing atmosphere. Additional coating with SiC results to formation of a layer of amorphous Si between an external scale of crystalline Cr2O3 and an inner compact Cr2O3 layer which further improves the oxidation resistance.
