A CORROSION RESISTANT OBJECT HAVING AN OUTER LAYER OF A PRECIOUS METAL

摘要

An object (1) comprising a conductive body part (2) , a layer (4) comprising a refractory metal (e.g. tantalum) , and a layer (6) 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.