Method of sealing an anodized metal article

US10801123B2 · kind B2 · utility

Assignee

• RAYTHEON TECHNOLOGIES CORPORATION · US

Inventors

• Zhongfen Ding · South Windsor, US
• Robert R. Hebert · Storrs, US
• Weilong Zhang · Glastonbury, US
• Bart Antonie van Hassel · Getzville, US
• Mark R. Jaworowski · Sarasota, US
• Michael A. Kryzman · Town of West Hartford, US
• Blair A. Smith · South Windsor, US
• Georgios S. Zafiris · Glastonbury, US
• Promila Bhaatia · Farmington, US
• Mark A. Brege · Rockford, US
• Shaahin Amini · Riverside, US
• Vijay V. Pujar · San Diego, US

Key dates

• Filing date: Mar 27, 2017
• Grant date: Oct 13, 2020
• Expiry date: Mar 3, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D11/10
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method of coating a metal article is disclosed that includes immersing a metal article having an exterior anodized layer in a bath containing a chemically active corrosion inhibitor, and applying a voltage to the article during the immersing, the voltage driving the chemically active corrosion inhibitor from the bath into the exterior anodized layer. An article is also disclosed that has a substrate comprising a metal, and a porous anodized layer formed on an exterior surface of the substrate that is infiltrated with a chemically active corrosion inhibitor, the anodized layer having an inward-facing region and an outward-facing region, the anodized layer having a greater concentration of chemically active corrosion inhibitors in the inward-facing region than in the outward-facing region.