The present invention relates to a process for producing a metallic and / or nonmetallic substrate which is protected against 
corrosion at least in regions and is, in particular, shiny, which comprises a) provision of a substrate having at least one surface which can be coated at least in regions and b) application of at least one metallic protective layer comprising a first 
metal, a first 
noble metal or a first 
metal alloy and at least one acid, an 
oxide, 
double oxide, hydrated 
oxide, sulphide, 
halide, 
nitride, 
carbide, carbonitride, 
boride, 
silicide, oxyhalide and / or salt of a second 
metal, of a second 
noble metal and / or of a second 
metal alloy. The invention further relates to a substrate which is protected against 
corrosion at least in regions and is, in particular, shiny, which comprises a substrate and at least one metallic protective layer comprising a first metal, a first 
noble metal or a first 
metal alloy and at least one acid, an 
oxide, 
double oxide, hydrated oxide, sulphide, 
halide, 
nitride, 
carbide, carbonitride, 
boride, 
silicide, oxyhalide, in particular oxyfluoride, and / or salt of a second metal, of a second noble metal and / or of a second 
metal alloy.