Corrosion inhibitor-incorporated layered double hydroxide and sol-gel coating compositions and related processes

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United States of America Patent

PATENT NO 10246594
APP PUB NO 20180022938A1
SERIAL NO

15231668

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Abstract

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A corrosion-resistant coating on an aluminum-containing substrate such as an aluminum substrate, an aluminum alloy substrate (e.g., AA 2024, AA 6061, or AA7075), or other aluminum-containing substrate includes a corrosion inhibitor-incorporated Zn—Al layered double hydroxide (LDH) layer and a sol-gel layer. A zinc salt and a corrosion inhibitor (e.g., a salt of an oxyanion of a transition metal such as a vanadate) is dissolved to form a zinc-corrosion inhibitor solution, and the substrate is immersed in or otherwise contacted with the solution to form the corrosion inhibitor-incorporated Zn—Al LDH layer on the substrate. A sol-gel composition is applied on the corrosion inhibitor-incorporated Zn—Al LDH layer of the substrate to form a sol-gel layer, and the sol-gel layer is cured.

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Patent Owner(s)

  • THE BOEING COMPANY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gaydos, Stephen P St. Louis, US 43 51
Ijeri, Vijaykumar S Bangalore, IN 27 37
Prakash, Om Bangalore, IN 84 212
Reddy, Dendi Sreenivas Hyderabad, IN 8 26
Soma, Raju Kalidindi Ramachandra Hyderabad, IN 11 28
Subasri, Raghavan Hyderabad, IN 8 26

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