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Publication numberUS3107175 A
Publication typeGrant
Publication dateOct 15, 1963
Filing dateOct 2, 1961
Priority dateOct 2, 1961
Publication numberUS 3107175 A, US 3107175A, US-A-3107175, US3107175 A, US3107175A
InventorsCape Arthur T
Original AssigneeCoast Metals Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method of applying metallic coatings
US 3107175 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

3,107,175 ?atented Get. 15, 1963 3,107,175 METHQD 9F AiPLYlNG METALLHC COATINGS Arthur T. Cape, Monterey, (Iaiii, assignor to Coast Metals, lino, Little Ferry, N.E., a corporation of Detaware No Drawing. Filed Get. 2, 1961, Ser. No. 142,020 1 Qiaim. (Cl. 117-130} This invention relates generally to methods of applying metallic coatings, but has reference more particularly to the production of metallic coatings on articles by chemical methods.

In accordance with the invention, a mixture of aluminum powder and nickel fluoride, in the proportions of 40 to 60 parts by weight of aluminum to 60 to 40- parts by weight of the fluoride, is placed, in a thin layer, on a part, as for example, a part made of stainless steel, super alloys, etc., and the article is heated to a temperature within the range of from about 1950 F. to about 2050 F., for about one hour.

This produces a reaction, as a result of which a layer or coating is formed on the article, consisting of an alloy of nickel and aluminum, having a thickness of from about 0.0007 inch up to about 0.0035 inch, which coating is highly resistant to oxidation.

The time or period of heating has some influence on the nature and thickness of the coating formed, and this may be varied from about /2 hour to about 1 /2 hours.

To facilitate application of the aforesaid mixture to the article, the mixture may be formed into a paste, using a binder of an acrylic resin or other suitable binder, which disappears during the reaction, and does not therefore enter into the reaction.

If it is desired that the coating contain some chromium, the mixture can contain, in a desired amount, chromium fluoride, chromium difluoride or chromium trifluoride, in addition to, or in substitution for, the nickel fluoride.

If it is desired that the coating contain some cobalt, the mixture can contain, in a desired amount, a cobalt fluoride, in addition to, or in substitution for, the nickel fluoride.

In most cases, the adherence of the alloy coating to the article is greatly aided by applying .to the article, before the mixture is applied, a plating or thin layer of gold or platinum.

The reactions, in all cases, tend to be exothermic.

It is to be understood that various changes can be made in the method, as described, without departing from the scope of the appended claim.

Having thus described my invention, I claim:

The method of forming an alloy coating on a metallic article, which consists in applying to the article a mixture containing from about to parts by weight of aluminum powder, and from 60 to 40 parts by weight of one or more fluorides, selected from the group consisting of nickel fluoride, chromium fluoride, chromium difiuoride, chromium trifluoride, and cobalt fluoride, and heating the article to 'a temperature within the range of from about 1950 F. to about 2050 F., for a period of from about /2 hour to about 1 /2 hours to produce a reaction in which a layer of an alloy is formed on the article, said alloy consisting of aluminum and at least one element selected from the group consisting of nickel, chromium and cobalt.

References Cited in the file of this patent UNITED STATES PATENTS 2,463,342 Wiczer Mar. 1, 1949 2,496,971 Wiczer Feb. 5, 1950 2,905,549 Taylor et a1 Sept. 22, 1959 3,012,903 Cape Dec. 12, 1961

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2463342 *Apr 24, 1943Mar 1, 1949Wiczer Sol BMetallic coatings
US2496971 *Apr 30, 1948Feb 7, 1950Wiczer Sol BThermite coating process
US2905549 *Oct 14, 1957Sep 22, 1959Fansteel Metallurgical CorpMethod of recovering refractory metals
US3012903 *May 3, 1960Dec 12, 1961Coast Metals IncMethod of brazing
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3288634 *Jan 7, 1963Nov 29, 1966Gen ElectricMethod of forming a composite member
US3376107 *May 15, 1964Apr 2, 1968Oka AkiraStoichiometric transition metal hydrides
US3480460 *Sep 3, 1968Nov 25, 1969Du PontMethod of integration of particulate material within a metal substrate and the product thereof
US3711310 *Jul 26, 1971Jan 16, 1973United Aircraft CorpRepair process for aluminum and magnesium articles
US3819338 *Sep 17, 1971Jun 25, 1974Deutsche Edelstahlwerke AgProtective diffusion layer on nickel and/or cobalt-based alloys
US4228203 *Jan 23, 1979Oct 14, 1980Toyo Kogyo Co., Ltd.Method of forming aluminum coating layer on ferrous base alloy workpiece
US4241113 *Sep 6, 1979Dec 23, 1980Fiat Societa Per AzioniProcess for producing protective coatings on metals and metal alloys for use at high temperatures
U.S. Classification427/229, 428/656, 149/37, 428/652, 428/553, 428/669
International ClassificationC23C10/30, C23C10/00
Cooperative ClassificationC23C10/30
European ClassificationC23C10/30