Method for depositing an anticorrosive coating

Abstract

A method for depositing an anticorrosive coating on components, wherein an aluminum-zinc coating is used as an anticorrosive coating, and wherein the anticorrosive coating is deposited by thermal spraying, wherein an inert carrier gas with a reducing gas component is used for the thermal spraying.

Having thus described the invention, what we claim is: 
     
         1 . A method for depositing an anticorrosive coating on components, wherein an aluminium-zinc coating is used at least as a component part of an anticorrosive coating, characterised in that the aluminium-zinc coating is deposited by thermal spraying, wherein an inert gas with a reducing gas component is used for the thermal spraying. 
     
     
         2 . The method according to  claim 1 , wherein a further coating is deposited on or under the aluminium-zinc layer. 
     
     
         3 . The method according to  claim 2 , wherein the further coating comprises one or more coloured layers. 
     
     
         4 . The method according to  claim 1 , wherein hydrogen is used as the reducing gas component. 
     
     
         5 . The method according to  claim 1 , wherein nitrogen is used as the inert gas. 
     
     
         6 . The method according to  claim 1 , wherein a hydrogen-nitrogen mixture is used for the thermal spraying. 
     
     
         7 . The method according so  claim 1 , wherein arc spraying is used for the thermal spraying. 
     
     
         8 . The method according to  claim 1 , wherein the aluminium-zinc coating layer alone or as a component part of an anticorrosive coating is deposited on areas subject to high mechanical load to reduce wear and corrosion. 
     
     
         9 . The method according to  claim 1 , wherein a proportion of the reducing gas component in the inert gas amounts to between 0.1% and 10% 
     
     
         10 . The method according to  claim 1 , wherein a proportion of the reducing gas component in the inert gas amounts to between 2% and 4%. 
     
     
         11 . The method according to  claim 1 , wherein a thickness of the aluminium-zinc coating amounts to between 50 μm and 150 μm. 
     
     
         12 . The method according to  claim 1 , wherein a thickness of the aluminum-zinc coating amounts to between 75 μm and 120 μm. 
     
     
         13 . The method according to  claim 1 , wherein a thickness of the aluminium-zinc coating amounts to 100 μm. 
     
     
         14 . The method according to  claim 1 , wherein the adhesiveness of the spray-metallised aluminium-zinc layer amounts on average to between 7.0 and 8.0 MPa. 
     
     
         15 . The method according to  claim 2 , wherein the adhesiveness of the further layers to the spray-metallised aluminium-zinc layer itself or of the anticorrosive coating to the coated, material amounts on average to between 7.0 and 8.0 MPa. 
     
     
         16 . The method according to  claim 1 , wherein the anticorrosive coating is deposited on components that are exposed to a corrosive atmosphere. 
     
     
         17 . The method according to  claim 1 , wherein the corrosive atmosphere is selected from the group consisting of a sea water atmosphere, a marine atmosphere and a chemical atmosphere. 
     
     
         18 . The method according to  claim 1 , wherein the anticorrosive coating is deposited on components of a wind energy plant. 
     
     
         19 . The method according to  claim 1 , wherein the wind energy plant is an offshore wind energy plant. 
     
     
         20 . The method according to  claim 1 , wherein the inert gas with the reducing gas component is nitrogen and hydrogen.