Method of producing a pitted, porous electrodeposited chromium c

Details Method of producing a pitted, porous electrodeposited chromium c Method of producing a pitted, porous electrodeposited chromium c

1974-09-16

1976-06-15

Kaplan, G. L.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51326, 204 36, B24B 100, C25D 548, C25F 302

Patent

active

039628345

ABSTRACT:
A simple and more efficient process is provided for producing deep, non-connected pit type, porous chromium surfaces with more constant and uniform characteristics. A substrate is initially electroplated with an excess of chromium having predetermined physical and chemical properties. The chromium surface is then diamond abrasive grit honed to within a specific excess of the desired final size, followed by D.C. reverse etching at a predetermined rate of ampere minutes per square inch, and finally honed with conventional type abrasive honing stones to a desired bearing surface. Under magnification, the resulting surface reveals a specific type and degree or percentage of plateaus and depressions, herein called porosity and a specific depth of pits. Simultaneously, with the surface treatment, the chromium plated product is obtained within a required size or dimension.

REFERENCES:
patent: 2314604 (1943-03-01), Van der Horst
patent: 2412698 (1946-12-01), Van der Horst

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