Structure that counteracts biofouling in aquatic environments

Abstract

The invention aims at a structure which counteract bio-fouling in aquatic environments and is principally characterized by the fact that the surface of an object has parallel ribs projecting from it ( 4, 5 ), close to each other, which are narrowing outward and whose height is less than two millimetres.

1 . Structure that counteracts biofouling in aquatic environments, characterized by the fact that the surface of an object has ribs projecting from it, situated close to each other ( 4 ,  5 ), which are narrowing outward and whose height is less than two millimetres.  
     
     
         2 . Structure according to Patent  claim 1 , characterized by the fact that each rib has a cross-section in the main triangular with the angles at the base larger than 70 degrees.  
     
     
         3 . Structure according to an earlier patent claim, characterized by the fact that the ribs are made from a foil which is meant to be glued on the object which is to be protected.  
     
     
         4 . Structure according to Patent  claim 3 , characterized by the fact that the foil on its inside has a carrying layer of other material than the foil and where the carrying layer is meant to be glued on the object which is to be protected.  
     
     
         5 . Structure according to Patent  claim 1 , characterized by the fact that it is made with a cold or warm tool directly on the surface of the object which is to be protected.  
     
     
         6 . Structure according to Patent  claim 1 , characterized by the fact that it is made by chemical etching directly on the surface which is to be protected.  
     
     
         7 . Structure according to Patent  claim 1 , characterized by the fact that it is made by chemical etching on a foil which is glued on the object which is to be protected.  
     
     
         8 . Structures according to Patent  claim 1 , characterized by the fact that it is made on pipes by extrusion.