Chromate free fluoropolymer coated fastener inserts
OwnerWilliam Lutkus, William Giannakakosinventors
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Abstract
Disclosed are fastener inserts for preventing galvanic corrosion in fastener assemblies by coating fastener inserts with a resin bonded chromate free fluoropolymer composition having an average viscosity of between about 20 to 30 seconds at 25° C. Also disclosed is a method for providing coated inserts as well as the coated inserts produced.
Claims18
A method for preventing galvanic corrosion in fastener assemblies employing a metallic fastener insert, a threaded fastener and a receiving element, said method comprising the steps of:
- a) providing a fastener and a fastener insert for retaining the fastener within said receiving element;
- b) coating said fastener insert with a chromate free fluoropolymer composition;
- and
- c) adjoining the fastener and coated fastener insert within said receiving element.
A fastener assembly comprising:
- a threaded fastener formed from a first metal;
- a metallic fastener insert;
- and
- a receiving element;
- wherein at least one of the metallic fastener inserts and the receiving element is formed from second metal;
- whereby said fastener insert is coated with a chromate free fluoropolymer composition to reduce the potential occurrence of galvanic corrosion in the fastener assembly.
A coated metallic fastener insert of a fastener assembly including metallic fastener and a receiving element for said fastener insert, at least one of said insert, fastener and receiving element being formed from a metal alloy which is different from the metal of the other of said insert, fastener or substrate, said insert comprising:
- a substantially cylindrical body of helically would wire including a plurality of convolutions wherein the outer surface is coated with a chromate free fluoropolymer composition to preclude galvanic corrosion within said fastener assembly.
Dependencies are inferred from the claim text.