摘要:
The present invention relates to a method for producing an anticorrosive coating on a substrate and to an anticorrosive coating that can be obtained by this method.
摘要:
Es wird ein Verfahren zur nasschemischen Herstellung einer Katalysatorbeschichtung auf einem elektrisch leitfähigen Träger für Elektroden zur Chloralkali- oder Salzsäureelektrolyse mit elektrokatalytisch aktiven Komponenten auf Basis von Edelmetalloxiden, insbesondere Rutheniumoxid und/oder Iridiumoxid und gegebenenfalls zusätzlich Ventilmetalloxid, insbesondere Titanoxid beschrieben, bei dem zur Herstellung der Katalysatorbeschichtung a) eine Beschichtungslösung oder -dispersion mindestens enthaltend eine Vorläuferverbindung eines Edelmetalls und/oder ein Metalloxid eines Edelmetalls, insbesondere von Ruthenium und/oder Iridium und gegebenenfalls zusätzlich eine Zinn- und/oder Ventilmetallverbindung, und ein Lösungsmittel oder Dispersionsmittel hergestellt wird, wobei der Beschichtungslösung oder -dispersion eine oder mehrere Säuren zugesetzt werden, wobei das molare Verhältnis der in der Beschichtungslösung oder -dispersion befindlichen Summe der Stoffmengen an Säure (in mol) zu der Summe der Stoffmengen der in der Beschichtungslösung oder -dispersion enthaltenen Metalle aus den Metalle enthaltenden Komponenten (d.h. der Summe der in der Beschichtungslösung oder - dispersion enthaltenen Metalle in mol) mindestens 2:1 beträgt, b) die Beschichtungslösung oder -dispersion auf den leitfähigen Träger aufgebracht wird, c) die aufgebrachte Schicht von Lösungsmittel oder Dispersionsmittel weitgehend durch Trocknen befreit wird und d) die erhaltene getrocknete Schicht anschließend einer thermischen Behandlung bei einer Temperatur von mindestens 300°C, und gegebenenfalls in Gegenwart Sauerstoff enthaltender Gase, unter Bildung der Katalysatorbeschichtung unterzogen wird.
摘要:
The invention relates to the use of a coating agent that cures at room temperature. In order to provide a coating agent that cures at room temperature for preventing cathodic corrosion and for application as an aerosol and with a brush as a coating colour paint, according to the invention the coating agent is produced according to the following method: a) mixing 5 to 95 wt.-% of a metal alkoxide with 5 to 95 wt.-% of metal pigment, b) adding a solvent and a maximum of 10 wt.-% of a catalyst (relative to the amount of solid). This achieves cathodic protection that also effectively inhibits contact corrosion in substrates consisting of different metals. It has been shown in the context of this invention that said coating agent achieves a controlled reduction in activity by covering individual metal particles with a conductive or semi-conductive metal oxide coating, for example a titanium dioxide coating on zinc. Weldability is preserved and the coating agent can be varnished.
摘要:
The invention relates to a process for protecting vehicle body components, chassis components, engine components or exhaust systems from corrosion. In order to provide a process for actively protecting vehicle body components, chassis components, engine components or exhaust systems from corrosion, in which case the layer is to be applied on an industrial scale to standard steel and to sand-blasted press-hardened parts using conventional means (e.g. dipping, spraying, flooding), the invention proposes a process comprising the following process steps: a. using steel alloys which are conventionally used in the construction of vehicle bodies and vehicles or using hot-formed or press-hardened vehicle body components, chassis components, engine components or parts of exhaust systems which are provided with metallic coatings or metal-pigment-containing coatings or with such coatings for protection against scaling, b. using conventional joining processes to join together at least two vehicle body components, chassis components, engine components or parts of exhaust systems, which differ in composition, process undergone or surface coating, to form a composite, wherein at least one of the components joined together to form the composite is a hot-formed or press-hardened component, c. applying an anti-corrosion coating to the composite.
摘要:
The invention relates to a method for modifying metal melts using additives. In order to create a novel method for modifying metal melts wherein discharge of the additives is prevented, the invention proposes that particles, fibers, or hollow spheres are added to the metal melt, and are provided with a metal coating prior to adding to the metal melt, wherein the melting point of the metal coating is above that of the metal melt. A method is created by the invention, by means of which the properties of the metal melt, and thus that of the resulting metal, can be changed.
摘要:
The invention relates to a process for protecting vehicle body components, chassis components, engine components or exhaust systems from corrosion. In order to provide a process for actively protecting vehicle body components, chassis components, engine components or exhaust systems from corrosion, in which case the layer is to be applied on an industrial scale to standard steel and to sand-blasted press-hardened parts using conventional means (e.g. dipping, spraying, flooding), the invention proposes a process comprising the following process steps: a. using steel alloys which are conventionally used in the construction of vehicle bodies and vehicles or using hot-formed or press-hardened vehicle body components, chassis components, engine components or parts of exhaust systems which are provided with metallic coatings or metal-pigment-containing coatings or with such coatings for protection against scaling, b. using conventional joining processes to join together at least two vehicle body components, chassis components, engine components or parts of exhaust systems, which differ in composition, process undergone or surface coating, to form a composite, wherein at least one of the components joined together to form the composite is a hot-formed or press-hardened component, c. applying an anti-corrosion coating to the composite.
摘要:
The invention relates to a method for the production of solvent-poor sol-gel systems, comprising the following steps: (a) hydrolyzing or condensating a silan and/or an alkoyd and/or several alkoyds from amongst Al, Ce, Ga, Ge, Sn, Ti, Zr, Hf, V, Nb and Ta, (b) adding water to the reaction mixture until phase separation begins and (c) separating the condensate phase. The invention also relates to the sol-gel system thus obtained and to the use thereof.