Method for coating a substrate surface and coated product

Abstract

The present invention provides a cold sprayed layer of tungsten, molybdenum, titanium, zirconium, or of mixtures of two or more of tungsten, molybdenum, titanium and zirconium, or of alloys of two or more of tungsten, molybdenum, titanium and zirconium, or of alloys of tungsten, molybdenum, titanium, zirconium with other metals, wherein the cold spayed layer has an oxygen content of below 1,000 ppm.

What is claimed is: 
     
         1 . A cold sprayed layer of tungsten, molybdenum, titanium, zirconium, or of mixtures of two or more of tungsten, molybdenum, titanium and zirconium, or of alloys of two or more of tungsten, molybdenum, titanium and zirconium, or of alloys of tungsten, molybdenum, titanium, zirconium with other metals, wherein the cold spayed layer has an oxygen content of below 1,000 ppm. 
     
     
         2 . The cold sprayed layer as recited in  claim 1 , wherein the cold sprayed layer has a density of at least 97% of a density of a bulk material. 
     
     
         3 . The cold sprayed layer as recited in  claim 1 , wherein the cold sprayed layer is made of tantalum or niobium. 
     
     
         4 . The cold sprayed layer as recited in  claim 1 , wherein the cold sprayed layer is obtained by a method comprising applying coatings to surfaces,
 wherein a gas flow is sprayed at a supersonic speed onto a surface of an object, the gas flow comprising a mixture of a gas and a powder of a material selected from the group consisting of niobium, tantalum, tungsten, molybdenum, titanium and zirconium, alloys of nobium, tantalum, tungsten, molybdenum, titanium and zirconium, mixtures of nobium, tantalum, tungsten, molybdenum, titanium and zirconium, and alloys of nobium, tantalum, tungsten, molybdenum, titanium and zirconium with other metals, and   wherein the powder has a particle size of from 0.5 to 150 μm and an oxygen content of less than 1,000 ppm.   
     
     
         5 . A coated object comprising at least one cold sprayed layer as recited in  claim 1 . 
     
     
         6 . The coated object as recited in  claim 5 , wherein the cold sprayed layer is obtained by a method comprising applying coatings to surfaces,
 wherein a gas flow is sprayed at a supersonic speed onto a surface of an object, the gas flow comprising a mixture of a gas and a powder of a material selected from the group consisting of niobium, tantalum, tungsten, molybdenum, titanium and zirconium, alloys of nobium, tantalum, tungsten, molybdenum, titanium and zirconium, mixtures of nobium, tantalum, tungsten, molybdenum, titanium and zirconium, and alloys of nobium, tantalum, tungsten, molybdenum, titanium and zirconium with other metals, and   wherein the powder has a particle size of from 0.5 to 150 μm and an oxygen content of less than 1,000 ppm.   
     
     
         7 . The coated object as recited in  claim 5 , wherein the coated object or a component of the coated object comprises at least one of a metal, a ceramic material, and a plastic material. 
     
     
         8 . A process of using the coated object as recited in  claim 5  as a component in at least one of a chemical plant, a laboratory, a medical device, and an implant, the process comprising:
 providing the coated object; and 
 using the coated object as a component in at least one of a chemical plant, a laboratory, a medical device, and an implant. 
 
     
     
         9 . The coated object as recited in  claim 5 , wherein the coated object is a reaction vessel, a mixing vessel, a stirrer, a blind flange, a thermowell, a rupture disk, a rupture disk holder, a shell heat exchanger, a tube heat exchanger, a pipe, a valve, a valve body, or a part of a pump.