Methods of coating and surface finishing articles made of metals

Details Methods of coating and surface finishing articles made of metals Methods of coating and surface finishing articles made of metals

1972-10-26

1976-07-13

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

204 32R, 204 33, C25D 100, C25D 534, C25D 544

Patent

active

039691950

ABSTRACT:
Articles made of ferrous, non-ferrous and light metals and alloys thereof, e.g., aluminum, beryllium, magnesium, molybdenum, steel, tantalum, titanium, tungsten, vanadium and zinc and their alloys, are pretreated before coating and surface finishing in an anhydrous, inert, aprotic liquid, and subsequently electroplated with aluminum, cadmium, indium or zinc in an aprotic organo-metal electrolyte essentially free of molecular oxygen and water and, optionally, additionally finished by anodizing, chemical oxidation or diffusion. The pretreatment may be by erosion with finely-divided abrasive particles suspended in such liquid and impinged upon the surface of the article by hydraulic jetting, or with an aprotic liquid by the liquid-drop erosion method. Alternatively, the pretreatment may be by electrolytic action in a circuit where the article serves as the anode and is immersed in an anhydrous, aprotic electrolyte. Articles so pretreated and electroplated are thereafter more readily surface-finished or mechanically shaped.

REFERENCES:
patent: 2873233 (1959-02-01), Schnable
patent: 2893931 (1959-07-01), Boyett
patent: 2899367 (1959-08-01), Veeder
patent: 2901383 (1959-08-01), Lebsanft
patent: 3214867 (1965-11-01), Henning
patent: 3268421 (1966-08-01), McGraw
patent: 3448127 (1969-06-01), Dotzer
patent: 3672965 (1972-06-01), Harwood
patent: 3691030 (1972-09-01), Stroszynski
patent: 3699013 (1972-10-01), Miyata

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