| 摘要 |
Production of a metallic article coated with vitreous enamel involves anti-corrosion treatment of a plate, application of liquid enamel composition containing vitrifiable enamel frit, and vitrifying the frit by heating. Process does not require degreasing stage after the anti-corrosion treatment using an emulsion having an aqueous phase and colloids based on acrylic or methacrylic polymer. Preferred Features: The anti-corrosion treatment involves applying and drying a layer of the aqueous emulsion such that the surface density of the dried layer is 0.5-6 g/m<2>. The emulsion includes a lubricating material selected from waxes, mineral, vegetable, animal or synthetic oils, and fatty acids, in amount above 0.1% with respect to the weight of polymer in the emulsion. The process can include at least one forming operation, e.g. stamping, after the anti-corrosion treatment and before the application of the enameling composition. A lubrication stage is not included after the anti-corrosion treatment and before the forming operation. |
