Abstract: A method is provided for corrosion-proofing substrates made of materials containing cobalt, nickel and/or iron, in which cracking in the material and in a corrosion-proofing layer can be avoided. For this purpose, a slurry containing aluminium is applied to a substrate and the substrate, together with the applied slurry, is then subjected to a brief annealing of the surface layer at reduced temperature. Due to the heating of the surface layer of the substrate and of the slurry during the annealing of the surface layer, an exothermic reaction between the aluminium and the substrate metal takes place on the surface of the substrate, so that aluminide phases are formed which produce an aluminide diffusion layer on the substrate. Above this layer remains a residual layer of unused slurry.

Abstract: Protective layers of the MCrAlX type according to the prior art are often provided with a platinum layer to prevent diffusion of elements out of the base material into the MCrAlX. The MCrAlX alloy according to the invention includes halogens (F, Cl, Br, I), which prevent this diffusion, in particular of titanium.