Abstract:
A method of processing a workpiece includes forming a curved surface along an edge of the workpiece. The curved surface has a radius in a plane perpendicular to a length of the edge. The method also includes applying glass frit to the edge of the workpiece to encapsulate the edge. The method further includes firing the workpiece to fuse the glass frit and form a porcelain enamel coating bonded to the edge of the workpiece.
Abstract:
The invention relates to a steel sheet or part whose composition is suitable for enamelling, and which is coated with a coating consisting of a matrix of polymer in which particles of non-oxide ceramic are homogeneously dispersed. It also relates to the use of this coated steel sheet or part for producing an enamelled steel sheet or part, and to a process for producing an enamelled steel sheet or part allowing a decrease of firing temperature and time compared with conventional firing temperatures and times.
Abstract:
The invention concerns a method which consists in: providing a protective treatment against corrosion to the initial sheet metal using an aqueous emulsion containing colloids based on acrylic and/or methacrylic polymer; a step which consists in applying a coat of liquid enamelling composition comprising an enamel frit capable of being vitrified; a baking step adapted to vitrify said frit. The invention is characterised in that said method does not comprise a step for degreasing said surface subsequent to the protective treatment. The invention provides the advantages of improved adherence of the enamel and a simpler process.
Abstract:
The invention concerns a method which consists in: providing a protective treatment against corrosion to the initial sheet metal using an aqueous emulsion containing colloids based on acrylic and/or methacrylic polymer; a step which consists in applying a coat of liquid enamelling composition comprising an enamel frit capable of being vitrified; a baking step adapted to vitrify said frit. The invention is characterised in that said method does not comprise a step for degreasing said surface subsequent to the protective treatment. The invention provides the advantages of improved adherence of the enamel and a simpler process.
Abstract:
Metal products having improved properties and processes for preparing the metal products are provided. In an embodiment, the present disclosure provides for a metal product comprising a metal surface, an oxide layer and a glass layer. The glass layer is provided by coating a stable aqueous silicate or borosilicate solution onto the metal surface and curing the aqueous solution to produce a glass layer. The metal products have surface characteristics that outperform current anodized metal surfaces.
Abstract:
There is described a method of enamelling a substrate, the method including the steps of: treating a thin surface layer of said substrate with a laser beam so as to promote a change in the surface energy thereof; allowing the surface to cool; and, applying enamel thereto to wet and coat said 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.
Abstract:
A member provided with a composite coating excellent in the resistances to corrosion and molten metals, having a high resistance to the peeling or breakage of the coating, and also excellent in the resistances to heat and thermal impact. The composite coating is formed on the surface of a steel material by first forming thereon a spray coating of metals (including alloys), oxide and non-oxide ceramics, and cermets comprising these metals and ceramics as an undercoat and then forming thereon a vitreous coating as a topcoat. The composite coating is provided with an oxide layer on the surface (on the side of the vitreous coating) of the spray coating as the undercoat, thus improving tight adhesion of the undercoat to the vitreous coating as the topcoat in virtue of the moderate unevennesses and pores of the oxide layer.