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US 8,137,805 B2Granted
Manganese based coating for wear and corrosion resistance
AssigneeCaterpillar Inc.
InventorBeth Ann Sebright
Life of this patent
Estimating the term…
Abstract
A component is disclosed. The component includes a substrate made of a ferrous metal, and a coating on a surface of the substrate. The coating includes a compound having an empirical formula FexMnyOz, where x varies from about 0 to about 2, y varies from about 1 to about 4, and z varies from about 2 to about 8.
Claims20
A component for an exhaust system of an internal combustion engine comprising:
- a substrate positioned to be exposed to exhaust gases produced by the engine, the substrate being made of a ferrous metal;
- and
- a conversion coating formed on a surface of the substrate by chemically converting a portion of the surface, the coating including a compound having an empirical formula FexMnyOz, where x varies from about 0 to about 2, y varies from about 1 to about 4, and z varies from about 2 to about 8, wherein the empirical formula of the coating varies within the coating.
An engine system comprising:
- a power source;
- an air induction system;
- an exhaust system;
- and
- a component of at least one of the power source, the air induction system and the exhaust system, the component including a ferrous substrate having a conversion coating thereon, the coating being formed by chemically converting a portion of the substrate to the coating, the coating having an empirical formula of FexMnyOz, where x varies from about 0 to about 2, y varies from about 1 to about 4, and z varies from about 2 to about 8, wherein the empirical formula varies within the coating.
2 more elements
An engine component configured to be subject to corrosion and wear, comprising:
- a ferrous substrate;
- and
- a conversion coating having an empirical formula of FexMnyOz, where x varies from about 1 to about 2, y varies from about 1 to about 4, and z varies from about 2 to about 8, formed by chemically converting a portion of the substrate surface such that the empirical formula of the coating varies within the coating.
Dependencies are inferred from the claim text.