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Corrosion Resistant Cobalt Phosphorus Plating

IP.com Disclosure Number: IPCOM000094773D
Original Publication Date: 1965-Jun-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Moradzedah, Y: AUTHOR

Abstract

The resistance to corrosion of a plated cobalt-phosphorus film can be greatly increased by immersion in a hot dichromic salt solution. This treatment forms an extremely thin and transparent layer of presumably chromium-cobalt oxide on the surface of the plated surface.

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Corrosion Resistant Cobalt Phosphorus Plating

The resistance to corrosion of a plated cobalt-phosphorus film can be greatly increased by immersion in a hot dichromic salt solution. This treatment forms an extremely thin and transparent layer of presumably chromium-cobalt oxide on the surface of the plated surface.

A substrate of MYLAR* (or glass), which is electrolessly plated with a layer of cobalt-phosphorus, is dipped or immersed in about a 10% solution of sodium dichromate at a temperature of about 95 degrees C for a desired length of time, for example, 1-10 minutes.

Plated or vacuum deposited, sputtered, etc., layers of nickel, nickel-cobalt, or cobalt with or without phosphorus can also be treated by this method to form a corrosion resistant layer. *Trademark of E. I. du Pont de Nemours and Co.

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