Component oxidized by plasma electrolysis and method for the production thereof

Abstract

Surface-oxidized, metallic components or semifinished products and corresponding planar components and methods for producing such components and/or semifinished products and corresponding components are disclosed. Such objects may be used, for example, in exterior skin parts of a motor vehicle, such as hoods, car roofs, car doors, fenders and/or side frames, baking trays, or baths. One object is to propose methods for producing surface-oxidized components or semifinished products that have an at least partially oxidized surface. The disclosed methods are suitable for mass production. Some example methods involve applying a surface layer comprising Al, Mg, Ti and/or Zr to a metallic substrate, and then performing plasma electrolytic oxidation of the surface layer. The metallic substrate may be cut to length and formed into a component or semifinished product before or after the plasma electrolytic oxidation. At least one part of the surface layer may be less than 200 μm.

1 .- 15 . (canceled) 
     
     
         16 . A method for producing a surface-oxidized, metallic component, the method comprising:
 providing a metallic substrate that is strip-like or sheet-like;   applying a surface layer at least in some regions on one or both sides of the metallic substrate, wherein the surface layer comprises an alloy of at least one of aluminum, magnesium, titanium, or zirconium; and   performing one of:
 carrying out at least in some regions a plasma electrolytic oxidation of the surface layer applied to the metallic substrate, then cutting to length and forming the coated metallic substrate into a component, wherein a thickness of a part of the surface layer oxidized by plasma electrolysis is less than 5 μm; or 
 cutting to length and forming the metallic substrate into a component, then carrying out at least in some regions a plasma electrolytic oxidation of the surface layer applied to the component, wherein a thickness of a part of the surface layer oxidized by plasma electrolysis is 5-200 μm. 
   
     
     
         17 . A method for producing a surface-oxidized, metallic component, the method comprising:
 providing a metallic substrate that is strip-like or sheet-like;   applying a surface layer at least in some regions on one or both sides of the metallic substrate, wherein the surface layer comprises an alloy of at least one of aluminum, magnesium, titanium, or zirconium; and   carrying out at least in some regions a plasma electrolytic oxidation of the surface layer applied to the metallic substrate, wherein a thickness of a part of the surface layer oxidized by plasma electrolysis is less than 200 μm.   
     
     
         18 . The method of  claim 17  wherein applying the surface layer to the metallic substrate occurs by way of hot dip coating or roll plating. 
     
     
         19 . The method of  claim 17  wherein the metallic substrate that is provided comprises steel, high-grade steel, a nickel-based alloy or superalloy, or some other nonferrous alloy, the method further comprising coating the metallic substrate with a metallic coating based on at least one of Zn, ZnMg, ZnAl, or AlZn. 
     
     
         20 . The method of  claim 17  wherein the metallic substrate that is provided comprises steel and has a thickness of at most 3.0 mm. 
     
     
         21 . The method of  claim 17  further comprising winding up the metallic substrate on a coil after applying the surface layer. 
     
     
         22 . The method of  claim 17  wherein the surface layer comprises an aluminum alloy having a maximum of 11 percent by weight silicon. 
     
     
         23 . The method of  claim 17  further comprising feeding a component formed from the metallic substrate to a further treatment step. 
     
     
         24 . The method of  claim 17  further comprising using a component formed from the metallic substrate in at least one of turbine construction, power plant construction, engine construction, offshore construction, exhaust gas construction, furnace construction, automobile construction, or a sanitary sector. 
     
     
         25 . The method of  claim 24  wherein the component is a baking tray and has on one or both sides surface layers oxidized by plasma electrolysis. 
     
     
         26 . The method of  claim 24  further comprising using the component as an exterior skin part for at least one of an automobile, an automobile hood, an automobile roof, an automobile door, an automobile fender, or an automobile side frame. 
     
     
         27 . A planar component comprising a layer that has been oxidized by plasma electrolysis at least in some regions, wherein the layer comprises an alloy of at least one of aluminum, magnesium, titanium, or zirconium. 
     
     
         28 . The planar component of  claim 27  for use as an exterior skin part for at least one of an automobile, an automobile hood, an automobile roof, an automobile door, a baking tray, or a bath. 
     
     
         29 . The planar component of  claim 27  further comprising a sheet of steel, high-grade steel, a nickel-based alloy or superalloy, or another non-ferrous alloy. 
     
     
         30 . The planar component of  claim 27  wherein a thickness of the layer oxidized by plasma electrolysis is less than 5 μm. 
     
     
         31 . The planar component of  claim 27  wherein a thickness of the layer oxidized by plasma electrolysis is 5-200 μm. 
     
     
         32 . The planar component of  claim 27  further comprising a surface coating disposed on the layer oxidized by plasma electrolysis.