Ferrate conversion coatings for metal substrates

Details Ferrate conversion coatings for metal substrates Ferrate conversion coatings for metal substrates

2006-05-16

2006-05-16

King, Roy (Department: 1742)

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

C148S243000, C148S275000, C148S277000, C148S287000, C106S014110, C106S014210

Reexamination Certificate

active

07045024

ABSTRACT:
A method employing oxide film conversion coatings prepared using ferrate (VI) as the oxidizing agent is disclosed. Metal substrates or surfaces, such as aluminum, aluminum alloys or other metals, are contacted with an aqueous solution comprising ferrate (VI) anions to form a corrosion resistant conversion coating on the surface thereof. The ferrate anion concentration is preferably between about 0.0166% and about 1.66% by weight. The coating process is carried out by dipping, spraying, or painting at temperatures ranging from 25° C. to 100° C. for a period of time ranging from about 1 second to about 5 minutes.

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