Abstract: The present invention relates to a method for applying a weldable anti-scale coat to steel, comprising producing a thin silicatic layer free from metal pigments on the metallic steel surface, and subsequently applying and curing a wet film of a curable, pigment-containing paint; wherein said paint comprises, in solution in a liquid phase, a binder, comprising hydrolysates and/or condensates of at least one silane/siloxane and/or at least one silicone resin; at least one particulate metallic pigment of AI and at least one particulate metallic pigment of Bi. The present invention also relates to application of an organic paint film system obtainable in the method of the invention, a paint formula useful in the method of the invention, a hot forming operation on steel coated in the method of the invention; and a hot-formed steel component suitable for electrical spot welding processes.

Abstract: The present invention relates to electrically conductive and electrically weldable anti-corrosion compositions for coating metal surfaces, a process for coating metal surfaces with electrically conductive organic coatings, as well as the correspondingly coated and optionally painted metal strips, sheets or parts, the coatings comprising: an organic binder, an anti-corrosion pigment, at least one conductive pigment with a density of at least 3 g/cm3 and optionally at least one conductive pigment with a density of less than 3 g/cm3.

Abstract: The present invention relates to a method for applying a weldable anti-scale coat to steel, comprising producing a thin silicatic layer free from metal pigments on the metallic steel surface, and subsequently applying and curing a wet film of a curable, pigment-containing paint; wherein said paint comprises, in solution in a liquid phase, a binder, comprising hydrolysates and/or condensates of at least one silane/siloxane and/or at least one silicone resin; at least one particulate metallic pigment of Al and at least one particulate metallic pigment of Bi. The present invention also relates to application of an organic paint film system obtainable in the method of the invention, a paint formula useful in the method of the invention, a hot forming operation on steel coated in the method of the invention; and a hot-formed steel component suitable for electrical spot welding processes.

Abstract: The invention relates to a method for a preliminary metallizing treatment of galvanized or zinc alloy-coated steel surfaces or joined metallic parts that at least partly have zinc surfaces, in a surface treatment encompassing several process steps. In the disclosed method, metallic coats of especially a maximum of 100 mg/m2 of molybdenum, tungsten, cobalt, nickel, lead, tin, and/or preferably iron are produced on the treated zinc surfaces. Another embodiment of the invention relates to an uncoated or subsequently coated metallic part which has been subjected to the disclosed preliminary metallizing treatment as well as the use of such a part for making bodies during the production of automobiles, building ships, in the construction industry, and for manufacturing white products.

Abstract: The invention relates to a metal sheet, or a component made of a metallic material, comprising a layer system on the surface with at least the following layers: a) a conversion layer, comprising no more than 1 mg chromium per m2, b) a layer of a cross-linked organic polymer system with a thickness in the range of 0.5 to 2.5 ?m, comprising, in relation to the total mass of said layer, 2 to 25 wt. % of an electrically conductive pigment having a specific weight of 3 g/cm3 maximum, however no more than 5 wt. % of the electrically conductive pigment having a specific weight of more than 3 g/m3. A coating material and a coating method for the production of the layer b).

Abstract: The invention relates to a method for a preliminary metallizing treatment of galvanized or zinc alloy-coated steel surfaces or joined metallic parts that at least partly have zinc surfaces, in a surface treatment encompassing several process steps. In the disclosed method, metallic coats of especially a maximum of 100 mg/m2 of molybdenum, tungsten, cobalt, nickel, lead, tin, and/or preferably iron are produced on the treated zinc surfaces. Another embodiment of the invention relates to an uncoated or subsequently coated metallic part which has been subjected to the disclosed preliminary metallizing treatment as well as the use of such a part for making bodies during the production of automobiles, building ships, in the construction industry, and for manufacturing white products.

Abstract: A process for coating metals, selected from aluminum and its alloys, zinc and its alloys, and galvanized or alloy-galvanized steel, in which the metal is given a weather-resistant protective coating, wherein the metal is cleaned if necessary, and thereafter subjected to a conversion treatment; optionally flushed with water and/or dried; brought into contact with a coating agent which comprises aliphatic cross-linking urethane resins, cross-linking agents, anti-corrosion pigments, one or more organic solvents and/or water and, if desired, other active or auxiliary substances; and then cured.

Abstract: A composition for coating metal surfaces based on crosslinking polyester resins as an organic constituent, which, based on its total mass, contains from 4 to 20% by weight of aluminum flakes and not more than 0.1% by weight of compounds containing isocyanate groups. The composition preferably comprises, as an organic binder, at least one hydroxylated polyester resin, preferably having a mean molar mass in the range from 2000 to 15,000, a crosslinking component for the hydroxylated polyester resin and an acidic crosslinking catalyst. A process for applying the composition to metal strip in a belt process is likewise disclosed. The layer application is adjusted within the range from 3 to 30 ?m according to the end use, for which double coating may be advantageous. For example, the composition may serve as a “galvanization replacement”.

Abstract: A substance for coating metal surfaces, comprising organic resin components that are dissolved or dispersed in an organic solvent, or solvent mixture, having at least the following organic resin components: a) epoxy resin, present as polyether comprising hydroxyl groups, based on a bisphenol epichlorohydrin polycondensation product, b) blocked aliphatic polyisocyanate, c) unblocked aliphatic polyisocyanate, d) at least one reaction component, selected from polyesters comprising hydroxyl groups and poly(meth)acrylates comprising hydroxyl groups. The substance may also comprise at least one conductivity pigment. The invention further provides a method for coating a sheet metal with this substance, the respectively coated sheet metal, and the use thereof.

Abstract: The invention relates to a metal sheet, or a component made of a metallic material, comprising a layer system on the surface with at least the following layers: a) a conversion layer, comprising no more than 1 mg chromium per m2, b) a layer of a cross-linked organic polymer system with a thickness in the range of 0.5 to 2.5 ?m, comprising, in relation to the total mass of said layer, 2 to 25 wt. % of an electrically conductive pigment having a specific weight of 3 g/cm3 maximum, however no more than 5 wt. % of the electrically conductive pigment having a specific weight of more than 3 g/m3. A coating material and a coating method for the production of the layer b).

Abstract: A process for coating metals, selected from aluminum and its alloys, zinc and its alloys, and galvanized or alloy-galvanized steel, in which the metal is given a weather-resistant protective coating, wherein the metal is cleaned if necessary, and thereafter subjected to a conversion treatment; optionally flushed with water and/or dried; brought into contact with a coating agent which comprises aliphatic cross-linking urethane resins, cross-linking agents, anti-corrosion pigments, one or more organic solvents and/or water and, if desired, other active or auxiliary substances; and then cured.

Abstract: The present invention relates to electrically conductive and electrically weldable anti-corrosion compositions for coating metal surfaces, a process for coating metal surfaces with electrically conductive organic coatings, as well as the correspondingly coated and optionally painted metal strips, sheets or parts, the coatings comprising: an organic binder, an anti-corrosion pigment, at least one conductive pigment with a density of at least 3 g/cm3 and optionally at least one conductive pigment with a density of less than 3 g/cm3.

Abstract: A metal object is coated by applying the following layers in sequence to at least part of the surface of the metal object: (a) a chemical conversion layer, (b) a conductive organic layer having a thickness of 1 to 10 microns and containing at least an organic binder and an electrically conductive substance, (c) an electrodeposition lacquer having a thickness of 25 to 35 microns, and (d) at least one layer of topcoat. No filler is applied between the electrodeposition layer and the at least one layer of topcoat.

Abstract: A conductive and weldable anti-corrosion composition for coating metal surfaces which contains: (a) 5 to 40 wt. % of an organic binder containing: (aa) at least one epoxide resin (ab) at least one hardener selected from cyanoguanidine, benzoguanamine and plasticised urea resin (ac) at least one amine adduct selected from polyoxyalkylenetriamine and epoxide resin/amine adducts (b) 0 to 15 wt. % of an anti-corrosion pigment (c) 40 to 70 wt. % of a conductive pigment selected from powdered zinc, aluminum, graphite, molybdenum sulfide, carbon black and iron phosphide (d) 0 to 45 wt. % of a solvent; and a lacquered metal structural part which has a conductive organic layer.

Abstract: A conductive and weldable anti-corrosion composition for coating metal surfaces which contains: