Invention Grant
- Patent Title: Sol-gel coating compositions including corrosion inhibitor-encapsulated layered metal phosphates and related processes
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Application No.: US15431506Application Date: 2017-02-13
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Publication No.: US10421869B2Publication Date: 2019-09-24
- Inventor: Vijaykumar S. Ijeri , Om Prakash , Stephen P. Gaydos , Raghavan Subasri , Kalidindi Ramachandra Soma Raju , Dendi Sreenivas Reddy
- Applicant: The Boeing Company
- Applicant Address: US IL Chicago
- Assignee: The Boeing Company
- Current Assignee: The Boeing Company
- Current Assignee Address: US IL Chicago
- Agency: Haynes and Boone, LLP
- Main IPC: C09D5/08
- IPC: C09D5/08 ; C09D7/65 ; C09D7/80 ; C09D5/10 ; C09D183/08 ; C23C18/12 ; C08K3/18 ; C08K3/28 ; C08K3/32

Abstract:
A layered tetravalent metal phosphate composition (e.g., a layered zirconium phosphate composition) and a first corrosion inhibitor (e.g., cerium (III), a vanadate, a molybdate, a tungstate, a manganous, a manganate, a permanganate, an aluminate, a phosphonate, a thiazole, a triazole, and/or an imidazole) is dispersed in an aqueous solution and stirred to form a first solution. A precipitate of the first solution is collected and washed to form a first corrosion inhibiting material (CIM), which includes the first corrosion inhibitor intercalated in the layered tetravalent metal phosphate composition. The first CIM is added to a first sol-gel composition to form a first CIM-containing sol-gel composition. The first CIM-containing sol-gel composition is applied on a substrate to form a CIM-containing sol-gel layer, cured by UV radiation, and thermally cured to form a corrosion-resistant coating. One or more additional sol-gel composition may be applied on the substrate.
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