Process for producing an ornamental rust finish on a ferrous met

Details Process for producing an ornamental rust finish on a ferrous met Process for producing an ornamental rust finish on a ferrous met

1995-10-24

1998-03-17

Silverberg, Sam

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

148273, C23C 2250

Patent

active

057282366

ABSTRACT:
A chemically derived product that rusts metal instantly upon contacting the surface of a metal and which can be easily and safely used by ornamental metal craftpersons. The chemically derived product is a liquid compound that contains the following constituents: (a) 93.0% by weight of water; (b) up to 5.0% by weight of a copper salt, the copper salt being selected from a copper salt group consisting of copper sulfate, copper nitrate, and copper chloride; and (c) a remaining amount consisting of an acid compound selected from an acid compound group consisting of sulfamic acid, oxalic acid, hydrochloric acid and nitric acid. The liquid compound can be particularly formulated for oxidizing steel or copper and may be produced having a predetermined coloring dye constituent selected from a color dye group consisting of copper, auburn, or gold, if oxidizing steel, or a color dye selected from a color dye group consisting of patina, aqua blue, or green, if oxidizing copper.

REFERENCES:
patent: 2001753 (1935-05-01), Tanner
patent: 2054737 (1936-09-01), Brunner
patent: 3725138 (1973-04-01), Jones
patent: 3930898 (1976-01-01), Cooley
patent: 5160381 (1992-11-01), Gervias
Metal Coloring, David Fishlock pp. 240-241 1962.

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