Corrosion resistant bushing
AssigneeSaint-Gobain Performance Plastics Pampus GmbH
InventorParag Natu
Life of this patent
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Abstract
A method of forming a corrosion resistant bushing includes bonding a sliding layer to a first surface of a load bearing substrate to form a laminate sheet and cutting a blank from the laminate sheet. The laminate sheet includes an exposed surface corresponding to a second surface of the load bearing substrate. The blank includes cut edges having a load bearing substrate portion. The method further includes forming a semi-finished bushing from the blank, and applying a corrosion resistant coating to the exposed surface and the load bearing substrate portion of the cut edges to form the corrosion resistant bushing.
Claims16
A bushing comprising:
- a load bearing substrate having a first major surface, a second major surface, and edges;
- a sliding layer bonded to the first surface, wherein the sliding layer includes a polymer, wherein the polymer is selected from the group consisting of polytetrafluoroethylene, fluorinated ethylene-propylene, polyvinylidenfluoride, polychlorotrifluoroethylene, ethylene chlorotrifluoroethylene, perfluoroalkoxypolymer, polyacetal, polybutylenterephtalate, polyimide, polyetherimide, polyetheretherketone, polyethylene, polysulfone, polyamid, polyphenylenoxide, polyphenylensulfide, polyurethane, polyester, and any combination thereof;
- and
- a corrosion resistant layer bonded to the second surface and extending to cover the edges of the load bearing substrate, wherein the corrosion resistant layer includes an epoxy resin, wherein the corrosion resistant coating further includes an adhesion promoter layer underlying the epoxy resin layer, the adhesion promoter selected from the group consisting of a zinc phosphate, an iron phosphate, a manganese phosphate, a tin phosphate, a silane, a chlorinated polyolefin, zinc, zinc-nickel, and any combination thereof.
A bushing preform comprising:
- a load bearing substrate having a first major surface, a second major surface, and edges;
- a sliding layer bonded to the first surface, wherein the sliding layer includes a polymer, wherein the polymer is selected from polytetrafluoroethylene, fluorinated ethylene-propylene, polyvinylidenfluoride, polychlorotrifluoroethylene, ethylene chlorotrifluoroethylene, perfluoroalkoxypolymer, polyacetal, polybutylenterephtalate, polyimide, polyetherimide, polyetheretherketone, polyethylene, polysulfone, polyamid, polyphenylenoxide, polyphenylensulfide, polyurethane, polyester, or any combination thereof;
- and
- a corrosion resistant layer bonded to the second surface and extending to cover the edges of the load bearing substrate, wherein the corrosion resistant layer includes an epoxy resin, wherein the corrosion resistant coating further includes an adhesion promoter layer underlying the epoxy resin layer, the adhesion promoter selected from the group consisting of a zinc phosphate, an iron phosphate, a manganese phosphate, a tin phosphate, a silane, a chlorinated polyolefin, zinc, zinc-nickel, and any combination thereof.
Dependencies are inferred from the claim text.