Aluminiumhaltiges Substrat für Emailbeschichtungen, enthaltend wenigstens auf den Seiten der Emailbeschichtungen eine Oxidschicht, wobei das Substrat eine Oberflächenschicht aus Aluminium oder einer Aluminiumlegierung enthält und auf dieser Schicht eine porenhaltige Oxidschicht befindlich ist, wobei die Oxidschicht eine Dicke von mehr als 0,2 µm aufweist, der Porendurchmesser 0,03 bis 0,15 µm ist und das Verhältnis von Porentiefe zu Porendurchmesser von 2 bis 60 beträgt. Auf das Substrat wird eine Emailbeschichtung, beispielsweise in einer Dicke von 50 bis 200 µm, aufgebracht. Die emaillierten Substrate können als Aussenverkleidungen an Fahrzeugen oder Gebäuden eingesetzt werden, wobei die emailbeschichteten Substrate gegen Ausseneinflüsse hervorragend geschützt sind.

Ferrous metal surfaces are protected against corrosion by providing the metal (11) with a flash coating (12) of copper followed by coating the structure with a corrosion inhibiting layer wholly or partially comprising a water soluble glass. A plant for providing the coating treatment is also described.

Disclosed in the present invention is a surface treatment agent for use on enamel steel or a part, an aqueous solution thereof comprising the following solid components in parts by mass: 15 to 55 parts of an aqueous polymer resin A; 32 to 58 parts of an organosilane coupling agent B having at least one epoxy functional group, wherein the ratio of parts by mass of the organosilane coupling agent B to the aqueous polymer resin A is 0.6 to 2.2; 0.2 to 3 parts of a polyol C containing at least three hydroxyl groups; 0.05 to 2 parts by mass of a molybdenum compound D, in terms of elemental molybdenum; 0.1 to 1 parts by mass of a phosphorus compound E, in terms of elemental phosphorus; 0.1 to 1 parts by mass of a zirconium compound F, in terms of elemental zirconium; and 0.5 to 8 parts of a metal salt or an organometallic compound G which promotes adhesion. The enamel steel coated with the surface treatment agent has excellent processability, and good resistance to various chemical media. The present invention effectively improves the surface adhesion between a ceramic glaze layer and a steel substrate, as well as the surface quality of a final enamel product.

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.

The present invention provides a product for enameling and an enameled product that achieve adhesion, bubble/black spot defect resistance and fishscale resistance, even when preprocessing and ground coating are omitted, which product comprise a steel sheet having on the surface thereof an oxide film of 0.10 µm to 400 µm thickness comprising oxides of components of the steel sheet, which steel sheet comprises, in mass%, C: 0.0001% to 0.040%, Si: 0.0001% to 0.50%, Mn: 0.001% to 2.00%, P: 0.0001% to 0.10%, S: 0.0001% to 0.060%, Al: 0.0001% to 0.10%, N: 0.0001% to 0.015%, and O: 0.0001% to 0.070%, further comprises one or more of Ni:0.01% to 2.00%, Co: 0.0005% to 2.00%, Cr: 0.001% to 2.00%, Cu: 0.01% to 2.00%, Mo: 0.0001% to 2.00%, and Ti: 0.0005% to 0.50%, where Ni + Co + Cr/2 + Cu + Mo + Ti: 0.010% to 8.0%, the balance being Fe and unavoidable impurities.

Um zur Emaillierung der Oberfläche eines Stahlkörpers, insbesondere einer Rohraußenoberfläche, durch Direktemaillierung, eine hohe Lebensdauer des Stahlkörpers in hochkorrosiven Umgebungen sowie eine einfache Herstellung der Emaillierung zu ermöglichen, wird vorgeschlagen,

daß zu emaillierende Oberflächenbereiche des Stahlkörpers einer Randentkohlung unterzogen werden, worauf mindestens eine Schicht aus Direktemail aufgebracht wird.

A new glass lining application method enables stable, uniform glass lining layers to be applied to large glass-lined instruments composed of a stainless base material, the method including forming a thermal spray treatment layer by applying a thermal spray treatment to a surface of a stainless base material using a thermal spray material selected from a group composed of a stainless material identical to the base material, Ni metal, Cr metal, Fe metal, Co metal, Ni-Cr alloys, and Fe-Cr alloys, then forming a glass lining layer on the thermal spray treatment layer by means of a glass lining heat treatment using a ground coat and a cover coat, a surface roughness Rz of the thermal spray treatment layer being within a range from 5 to 100 µm, and an open pore diameter being within a range from 3 to 60 µm.