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Method and means of applying an antifouling coating on marine hulls

  • US 4,751,113 A
  • Filed: 04/01/1983
  • Issued: 06/14/1988
  • Est. Priority Date: 04/01/1983
  • Status: Expired due to Fees
First Claim
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1. In a method of applying an antifouling coating to a marine surface of a metal selected from the group consisting of copper and/or copper based alloys in which said metal is melted and sprayed in a molten state, the improvement comprising the steps of grit blasting said marine surface, coating said grit blasted surface with an adhesion and seal layer, thermally spraying high velocity molten metal particles of a selected one of siad metals at said adhesion and seal layer in a first pass to embed moten metal particles in said adhesion and seal layer while it is tacky prior to curing of same and form a first layer of embedded metal having undercuts and a rough surface and after curing of said adhesion and seal layer, thermally spraying said metal at a high velocity in a further pass to embed the metal particles thermally sprayed in said second pass by forcing the molten particles into the undercuts and roughness of said rough surface formed by the embedment of said first layer to shape themselves to lockingly secure the metal layer formed by said further pass to said first embedded layer of metal and light wet sanding the exposed metal surface to produce a smoother marine surface.

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