Pipes and tubular conduits – Distinct layers – Coated
Patent
1997-02-11
1998-06-30
Brinson, Patrick F.
Pipes and tubular conduits
Distinct layers
Coated
138137, 138140, 138143, F16L 714
Patent
active
057719403
ABSTRACT:
A multi-layer tube comprises a metal tube having an outer surface and a zinc layer bonded to the metal tube outer surface, wherein the zinc layer is selected from the group consisting of zinc plating, zinc nickel alloys, zinc cobalt alloys, zinc aluminum alloys, and mixtures thereof. A surface treatment layer is bonded to the zinc layer, wherein the surface treatment layer is selected from the group consisting of a zinc/aluminum/rare earth alloy, phosphate, chromate and mixtures thereof. A first polymeric layer is bonded to the surface treatment layer, wherein the first polymeric layer is selected from the group consisting of a thermoplastic elastomer, an ionomer, a nylon, a fluoropolymer, and mixtures thereof. A second polymeric layer is bonded to the first polymeric layer, wherein the second polymeric layer is selected from the group consisting of a nylon, a thermoplastic elastomer, a fluoropolymer, and mixtures thereof. A process for manufacturing a multi-layer tubing for conveying fluids in a vehicle system comprises the step of extruding multiple layers of a melt-processible thermoplastic to a pretreated metal tube having an external surface with at least a zinc based coating and a sealant coating on top of the zinc based coating.
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Davie Robert M.
Iorio Ralph A.
McDaniel James D.
Mitchell Frank L.
Nie Tao
Brinson Patrick F.
ITT Corporation
Lewis J. Gordon
Twomey Thomas N.
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