Patent application number | Description | Published |
20080274372 | Corrosion Resistant Object Having an Outer Layer of a Precious Metal - An object comprising a conductive body part, a layer comprising a refractory metal (e.g. tantalum), and a layer comprising a precious metal (e.g. platinum or gold). A metallurgical bond has been formed between the layers. Thereby oxidation of the refractory metal layer, and thereby passivation of the object, can be avoided even with small amounts of precious metal. This lowers the material costs while ensuring desired corrosion resistant properties. The object is suitable for an electrode to be used in a corrosive environment, in particular when a large conductivity is needed. Also a method of manufacturing the object. The metallurgical bond is provided by heating the object. | 11-06-2008 |
20080280027 | Method of Investigating a Coated Surface of an Object - A method of visually investigating a coated surface of an object, the coating comprising a metal or an alloy, in order to determine whether or not the coating is tight. An increasing potential is applied to the object until a desired current level has been obtained or until a maximum potential has been reached. In case the coating is tight this results in a change in colour of the coating. This may be due to a polarization of the coating material and/or due to an increase in thickness of a naturally occurring metal oxide layer. In case the coating is tight the desired current level can not be obtained, and the potential is increased to the maximum level resulting in a change in colour. In case pinholes are present it is possible to obtain the desired current level, and the increase in potential is stopped before it is high enough to cause the change in colour. Provides a dramatic visual effect allowing an immediate determination of whether or not pinholes are present. Need for additional equipment for determining the presence of pinholes is avoided. In case the coating material is or comprises tantalum or an alloy of tantalum, the colour is changed into a distinct blue colour. | 11-13-2008 |
20080311387 | Corrosion Resistant Object Having an Outer Layer of a Ceramic Material - An object comprising an electrically conductive body part, e.g. comprising copper or silver, and a layer comprising a refractory metal, preferably tantalum. At least part of the refractory metal layer has been transformed into an electrically conductive ceramic material, preferably a tantalum boride. The refractory metal layer improves the corrosion resistant properties of the object and the ceramic material prevents oxidation of the refractory metal layer, and thereby passivation of the object during conduction of a current. The object is suitable for use as an electrode in corrosive environments. The object is cost effective because passivation can be avoided without applying a layer of precious metal. Also a method of forming the object in which the ceramic material is preferably provided by applying boride in a gaseous or solid phase and heating the object. | 12-18-2008 |
20090125109 | METHOD FOR COATING AN OBJECT - A method for coating an object ( | 05-14-2009 |
20100055494 | METHOD FOR TREATING TITANIUM OBJECTS WITH A SURFACE LAYER OF MIXED TANTALUM AND TITANIUM OXIDES - This invention introduces a method for treating a surface of an electrically conductive object with a refractory metal. In one embodiment, the refractory metal is tantalum and the object is a titanium substrate. A surface layer of mixed tantalum and titanium oxides is created by first heating the object and tantalum chloride in a reaction chamber and subsequently heat treating the object in an oxygen containing environment. The electrically conductive object can in a non-limiting way be DSA solutions (Dimensionally Stable Anodes), fuel cells or connector plates. | 03-04-2010 |
20110027608 | OBJECT HAVING A DUCTILE AND CORROSION RESISTANT SURFACE LAYER - This invention relates to an object having a corrosion resistant surface that is also sufficiently ductile to let the surface, or the whole object, be mechanically modified without creating cracks or other weaknesses undermining or damaging the corrosion resistance. The surface layer preferably contains at least 80% of a refractory metal, such as tantalum, and an alloy layer is created between a core element and the surface layer having the needed ductility and adhering abilities. | 02-03-2011 |
20110027614 | CORROSION RESISTANT OBJECT WITH ALLOYING ZONE - This invention relates to objects having a corrosion resistant surface improving the overall corrosion resistance of the object relative to the core material, preferably being titanium or titanium based. The surface layer preferably contains at least 80% of a refractory metal such as tantalum, or an alloy based on one or more refractory metals, To ensure a good adhering of the surface to the base material an alloy layer is created between a core element and the surface layer having a thickness at least twice that of the surface layer, where the alloy layer itself has corrosion resistant properties. | 02-03-2011 |
20150329960 | CORROSION RESISTANT OBJECT WITH ALLOYING ZONE - This invention relates to objects having a corrosion resistant surface improving the overall corrosion resistance of the object relative to the core material, preferably being titanium or titanium based. The surface layer preferably contains at least 80% by mass of a refractory metal such as tantalum, or an alloy based on one or more refractory metals, To ensure a good adhering of the surface to the base material an alloy layer is created between a core element and the surface layer having a thickness at least twice that of the surface layer, where the alloy layer itself has corrosion resistant properties. | 11-19-2015 |