Method for masking a component that is intended to be coated with a thermal spray layer

Abstract

Method for coating components by thermal spraying, wherein not the entire surface of the component is to be coated and wherein those parts of the surface that are not to be coated are covered by masking before coating and wherein the covering is made by a paste processes at least in the areas of critical mask boundaries, i.e. by way of a paste dispensed from at least one nozzle, wherein the paste is a curable paste and curing is photo induced and preferably made by way of UV radiation, characterized in that the masking utilizes a partial masking step and a complementary masking step, the complementary masking step being performed at least in the area of critical mask boundaries and the partial masking step being performed in an area spaced from the area of critical mask boundary and the method of partial masking is not a paste process.

What is claimed: 
     
         1 . A method for coating components by thermal spraying, wherein not the entire surface of the component is to be coated and wherein those parts of the surface that are not to be coated are covered by masking before coating and wherein the covering is made by means of paste processes at least in the areas of critical mask boundaries, i.e. by means of a paste dispensed from at least one nozzle, wherein the paste is a curable paste and curing is photo induced and preferably made by means of UV radiation, characterized in that the masking comprises a partial masking step and a complementary masking step, the complementary masking step being performed at least in the area of critical mask boundaries and the partial masking step being performed in an area spaced from the area of critical mask boundary and the method of partial masking is not a paste process. 
     
     
         2 . A method for coating components by thermal spraying, wherein not the entire surface of the component is to be coated and wherein those parts of the surface that are not to be coated are covered by masking before coating and wherein the covering is made by means of paste processes at least in the areas of critical mask boundaries, i.e. by means of a paste dispensed from at least one nozzle, wherein the paste is a curable paste and curing is photo induced and preferably made by means of UV radiation, characterized in that a first sealing bead is applied to the component in the area of at least one critical mask boundary in the course of the paste process and that a second sealing bead is at least partially applied to this first sealing bead. 
     
     
         3 . A method according to  claim 1 , characterized in that the paste is selected such, that the sealing bead formed when applied to the component has a contact angle of at least 90°.