Solid state diffusion of only metal elements or silicon into metallic material surfaces

CCHEMISTRY METALLURGY C23Surface treatment C23CCOATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL

C23C10/00Solid state diffusion of only metal elements or silicon into metallic material surfaces

C23C10/02Pretreatment of the material to be coated C23C10/04Diffusion into selected surface areas C23C10/06using gases C23C10/08only one element being diffused C23C10/10Chromising C23C10/12of ferrous surfaces C23C10/14more than one element being diffused in one step C23C10/16more than one element being diffused in more than one step C23C10/18using liquids C23C10/20only one element being diffused C23C10/22Metal melt containing the element to be diffused C23C10/24Salt bath containing the element to be diffused C23C10/26more than one element being diffused C23C10/28using solids C23C10/30using a layer of powder or paste on the surface C23C10/32Chromising C23C10/34Embedding in a powder mixture C23C10/36only one element being diffused C23C10/38Chromising C23C10/40of ferrous surfaces C23C10/42in the presence of volatile transport additives C23C10/44Siliconising C23C10/46of ferrous surfaces C23C10/48Aluminising C23C10/50of ferrous surfaces C23C10/52more than one element being diffused in one step C23C10/54Diffusion of at least chromium C23C10/56and at least aluminium C23C10/58more than one element being diffused in more than one step C23C10/60After-treatment