Method for Producing an Enamelled Steel Substrate

Abstract

The present invention is related to a method for producing an enamelled steel substrate, said method comprising the steps of: providing a steel substrate, applying to a surface of said steel substrate a solution comprising a solvent, a polymer precursor, and at least one metal or metal oxide, said metal or metal oxide being suitable for promoting the adhesion of an enamel layer to the surface of the steel substrate, curing said steel sheet, thereby removing said solvent, and forming an organic layer comprising said at least one metal or metal oxide, applying to said organic layer, an enamel layer, followed by a firing step, to obtain the enamelled steel substrate.

1 - 15 . (canceled) 
     
     
         16 . A method for producing an enamelled steel substrate, said method comprising the steps of:
 providing a steel substrate, applying to a surface of said steel substrate a solution comprising a solvent, a polymer precursor, and at least one metal or metal oxide, said metal or metal oxide being suitable for promoting the adhesion of an enamel layer to the surface of the steel substrate,   curing said steel sheet, thereby removing said solvent, and forming an organic layer comprising said at least one metal or metal oxide,   applying to said organic layer, an enamel layer, followed by a firing step, to obtain the enamelled steel substrate.   
     
     
         17 . The method according to  claim 16 , wherein said metal is chosen from the group consisting of Sc, Ti, V, Co, Cu, Ni, Fe, Mn, Mo, W and Sb and wherein said metal oxide is the oxide of a metal chosen from the group consisting of V, Co, Cu, Ni, Fe, Mn, Mo, W and Sb. 
     
     
         18 . The method according to  claim 17 , wherein said metal is chosen from the group consisting of Ni, Cu, Co, Mo and wherein said metal oxide is the oxide of a metal chosen from the group consisting of Ni, Cu, Co, Mo. 
     
     
         19 . The method according to  claim 16 , wherein said at least one metal or metal oxide is/are added to said organic layer in the form of a powder. 
     
     
         20 . The method according to  claim 19 , wherein said powder has a mean particle size smaller than 2 microns. 
     
     
         21 . The method according to  claim 16 , wherein said organic layer has a thickness between 100 nm and 10 microns, preferably between 100 nm and 6 microns. 
     
     
         22 . The method according to  claim 16 , wherein said solution is applied to the substrate by coil coating, dipping or spraying. 
     
     
         23 . The method according to  claim 16 , wherein said curing step takes place at a temperature between 80<0>C and 250<0>C. 
     
     
         24 . The method according to  claim 16 , wherein said firing step is performed at a temperature between 700[deg.]C and 900<0>C. 
     
     
         25 . The method according to  claim 16 , wherein the firing step is preceded by a step of drying the enamel layer. 
     
     
         26 . The method according to  claim 25 , wherein said steel substrate is subjected to a step of forming and/or cutting, after the step of applying said organic layer and before the step of applying said enamel layer. 
     
     
         27 . A steel substrate, comprising on the surface of the steel substrate an organic coating, consisting of a polymer layer comprising at least one metal or metal oxide, said metal or metal oxide being suitable for promoting the adhesion of an enamel layer to the surface of the steel substrate. 
     
     
         28 . The steel substrate according to  claim 27 , wherein said organic coating is a Thin Organic Coating, having a thickness between 100 nm and 10 microns, preferably between 100 nm and 6 microns. 
     
     
         29 . The substrate according to  claim 27 , wherein said substrate is a steel sheet. 
     
     
         30 . Use of a steel substrate according to  claim 27 , for producing an enameled steel sheet or part.