초록 ▼

Small, preferably micronsized hollow glass or ceramic spheres or foaming agents for making such micronsized hollow spaces or voids are incorporated into a resin material which is formed into a layer and after curing of the resin layer, it is abraded, sand or grit blasted so as to rupture the outermo

Small, preferably micronsized hollow glass or ceramic spheres or foaming agents for making such micronsized hollow spaces or voids are incorporated into a resin material which is formed into a layer and after curing of the resin layer, it is abraded, sand or grit blasted so as to rupture the outermost layer of spheres or voids to provide a plurality of undercuts or nooks and crannies. A thermally sprayed metal, such as copper, becomes embedded into the undercuts pores, nooks and crannies, such that the bond or adherent strength is greatly improved. This micronsized glass, ceramic spheres and/or pores greatly increases the bond strength by providing better undercuts in the surface to be sprayed by molten metal and provide the capability of depositing thicker layers without jeopardizing the bond.

대표청구항 ▼

In a marine surface protected from marine growth by an external layer of a thermally sprayed metal selected from copper and copper based alloys, the improvement wherein a layer of an adhesive resin is between said surface and said external layer of metal, a plurality of fractured inorganic hollow sp

In a marine surface protected from marine growth by an external layer of a thermally sprayed metal selected from copper and copper based alloys, the improvement wherein a layer of an adhesive resin is between said surface and said external layer of metal, a plurality of fractured inorganic hollow spheres in the interface between said resin and said external metal layer forming undercuts, nooks and crannies, said external layer of metal being constituted by a layer of solidified thermally sprayed metal particles sprayed in a molten state and filling and interlocking with said undercuts, nooks and crannies. The invention defined in claim 1 including a first metal layer with metal particles selected from copper and copper-nickel alloys embedded in said adhesive layer and said layer of thermally sprayed metal particles is sprayed in a molten state at a high velocity on said first metal layer. The invention defined in claim 3 wherein said first metal layer and said thermally sprayed layer have a combined thickness of at least 3 mils. The invention defined in claim 7 wherein said first metal layer is thinner than said thermally sprayed metal layer.