Controlled trivalent chromium pretreatment

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United States of America Patent

PATENT NO 9695523
SERIAL NO

14052719

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A method for forming a trivalent chromium coating on an aluminum alloy substrate includes adding a chromium-containing solution to a vessel, immersing the aluminum alloy substrate in the chromium-containing solution, immersing a counter electrode in the chromium-containing solution, and applying an electrical potential bias to the aluminum alloy substrate with respect to its equilibrium potential to form a trivalent chromium coating on an outer surface of the aluminum alloy substrate. A method for forming a trivalent chromium coating on a metal substrate includes adding a chromium-containing solution to a vessel, immersing the metal substrate in the chromium-containing solution, immersing a counter electrode in the chromium-containing solution, and modulating an electrical potential difference between the metal substrate and the counter electrode to form a trivalent chromium coating on an outer surface of the metal substrate.

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Patent OwnerAddress
HAMILTON SUNDSTRAND CORPORATIONFOUR COLISEUM CENTRE 2730 WEST TYVOLA ROAD CHARLOTTE NC 28217-4578

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Burlatsky, Sergei F West Hartford, US 73 324
Chen, Lei South Windsor, US 979 4055
Dardona, Sameh South Windsor, US 59 215
Jaworowski, Mark R Glastonbury, US 99 331
Novikov, Dmitri Avon, US 34 96

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