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US 2019/0169443 A1Published application
Increasing anti-corrosion through nanocomposite materials
AssigneeHamilton Sundstrand Corporation
InventorSteven Poteet
Life of this patent
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Abstract
A method of increasing corrosion resistance without leveraging toxic hexavalent chromium uses partially oxidized graphene particles mixed into primer applied on metallic alloy surfaces. Graphene is effective as an anti-corrosion primer additive because it acts as a physical barrier and has electrochemical properties that change potentials needed to induce corrosion.
Claims20
An anti-corrosion coating composition for a substrate comprising:
- an epoxy-based primer comprising non-chromate inhibitors;
- graphene particles mixed into the epoxy based primer;
- and
- alkoxysilanes mixed with the graphene particles.
1 more element
An article comprises:
- a substrate;
- an anodized layer on the substrate;
- a sealant;
- and
- an anti-corrosion layer attached to the anodizing layer opposite the substrate, the anti-corrosion layer comprising a primer containing partially oxidized graphene functionalized with an alkoxysilane and non-chromate inhibitors.
2 more elements
A method of preventing corrosion comprises:
- anodizing a surface of a metallic substrate such that an anodized layer is formed on the metallic substrate;
- and
- applying a primer with graphene particles, alkoxysilanes, and non-chromate inhibitors to the anodized layer on the metallic substrate.
Dependencies are inferred from the claim text.