Pretreatment of the material to be coated (C23C8/04 takes precedence)

Full Title

Solid state diffusion of only non-metal elements into metallic material surfaces (diffusion of silicon C23C10/00); Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals (C23C14/00 takes precedence) > Pretreatment of the material to be coated (C23C8/04 takes precedence)