Stripping of diffusion treated metals

摘要: Chromized nickel- and cobalt-based superalloys have alphachrome phase formed during chromizing, the amount of that is diminished by one or more treatments with alkali-permanganate solution intervening removal permanganate reaction product film as acid dip. A kit such solutions can be prepared. Low-alloy steel steam boiler tubing chromized interior aluminized exterior, long lengths without a perfectly sealed retort around it end caps fitted extra pack to reduce oxygen penetration interior. Chain saw cutter blades carburized. Stripping coatings from fluoride-containing nitric improved follow-up treatment fluoride-free solution. Smut forms on ferrous surface cleaning chemically removed first depositing nickel flash plating smut-containing surface, then dissolving aqueous containing little halide ion.