Abstract: The invention relates to a method of making composite strips and composite sheets of at least one first outer layer (1) of metal, one second outer layer (2) of metal, and at least one core layer (3) of plastic between the outer layers (1, 2) and bonded unitarily thereto, a first metal strip (4) for the first outer layer (1), a second metal strip (5) for the second outer layer (2), and a plastic web (6) for the core layer (6) being laminated together and continuously bonded unitarily into a composite strip by application of pressure and/or heat, the first metal strip (4) and the second metal strip (5) being heated before the lamination and/or during the lamination, characterized by the fact that, after lamination and bonding of the metal strips (4, 5), an actual transverse curvature of the composite strips is measured, and that the temperature of the first metal strip (4) and/or of the second metal strip (5) is carried out before the lamination and/or during the lamination as a function of the actual transvers

Abstract: The invention relates to a method for producing composite webs or composite sheets, consisting of at least a first lower cover layer (1) of metal, a second upper cover layer (2) of metal, and a core layer (3) of plastic, which is arranged between the cover layers (1, 2) and is integrally bonded thereto, wherein a first metal strip (4) for the lower cover layer (1), a second metal strip (5) for the upper cover layer (2), and a plastic web (6) for the core layer (3) are brought together and are integrally bonded to each other by the application of pressure and/or heat.

Abstract: A cost-favorable process for production of corrosion-resistant sheet steel products, having good characteristics of use for certain application purposes includes applying a zinc-containing coating by electro-galvanizing a flat steel product, finally cleaning mechanically and/or chemically the flat steel product, applying a magnesium-based coating to the finally cleaned zinc-containing coating by means of vapour deposition, and heat treating the coated flat steel product to form a diffusion or convention layer between the zinc-containing coating and the magnesium-based coating at a temperature of 320 ° C. to 335 ° C. under normal atmosphere.

Abstract: A process for controlling the layer weight during the phosphating of steel strip zinc-coated on one or both sides, using a phosphating solution which contains 1 to 6 g/l zinc ions and 10 to 30 g/l phosphate ions, characterized in that a Fe(II) ion content within the range of 3 to 100 mg/l is established in the phosphating solution. The higher the Fe(II) content, the lower is the layer weight. An alteration in the Fe(II) content of 3 to 20 mg/l results in an alteration in the layer weight of about 0.1 g/m2.