US1829623A - Process of treating metals - Google Patents
Process of treating metals Download PDFInfo
- Publication number
- US1829623A US1829623A US407795A US40779529A US1829623A US 1829623 A US1829623 A US 1829623A US 407795 A US407795 A US 407795A US 40779529 A US40779529 A US 40779529A US 1829623 A US1829623 A US 1829623A
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- US
- United States
- Prior art keywords
- metal
- binder
- coating
- article
- covering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
- C23C10/34—Embedding in a powder mixture, i.e. pack cementation
Definitions
- This invention relates to the artof treating metals so as to protect them against the effccts of oxidation and other corrosive agenc1es.
- my invention relates to the production ofan un'oxidizable coating on.
- nitrocellulose binders may be blown or loosened from the surface of the material bein coated with the result that the coating may no be as adherent as it other: wise might be.
- nitrocellulose binders Another drawback in the use of nitrocellulose binders is found in the nature of the material itself. Such binders have a fire hazard which must be guarded against.
- a process. of providing protective coatings may be carried out with a binder which will evaporate quickly at not too low a temperature leaving .no residue whatsoever to interfere with the; coating process and which has no explosive Application filed November 16, 1929. Serial No. 407,795.
- a paint comprising aluminum powder, or any other coating metal in the powdered or granular form, and any volatilizable alkyd resin as the binder.
- the resin may be dissolved in a suitable solvent to produce a solution of the desired viscosity.
- the .desired coating metal is suspended in this medium.
- any alkyd resin may be employed as the binder, I prefer to use a resin obtained by the interreaction of equal molecular proportions of glycerine and phthalic anhydride as such a resin when used as the binding medium has given very satisfactory results. The preparation of such a resin is well known in the art.
- the process of protecting metallic articles from oxidation or corrosion which consists in covering the articles at ordinary temperatures with a coating composed ofaluminum powder and a liquid alkydresin binder which wets and firmly adheres to metals at ordinary temperatures and volatilizes at higher temperatures, drying the coating, and then firing at a temperature at I which the aluminum alloys with the metal of the article, said temperature being abovethat at which the binder volatilizes.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
Patented @ct. 27, 1931 PATENT Jams a. n. WRIGHT, or" nnrnaus, nnw roan, ASSIGNOR T0 G NERAL. ELECTRIC comm, A conronarron on NEW YORK PROCESS OF TREATING- METALS No Drawing.
This invention relates to the artof treating metals so as to protect them against the effccts of oxidation and other corrosive agenc1es.'
More specifically, my invention relates to the production ofan un'oxidizable coating on.
such metals as iron, steel, and copper which readily oxidize at elevated temperatures, and has for its primary object the production of an improved process of the type set forth in the patent to Goodwin H. Howe, No. 1,655,269, dated January 3,1928. This patent deals with the process of applying a coating-metal as a paint. The advantages resulting from such a process are numerous and are set forthin this patent. The method consists essentially of covering the surface of the foundation metal with a mixture of another metal in powdered form and a nitrocellulose binder at ordinary temperatures, and then firing at a temperature which will cause the powdered metal to alloy with the foundation metal. The essential idea under-.
lying this process is the use'of a binder for the aluminum or other coating metal which will volatilize or decompose at a temperature below the temperature at which the aluminum alloys and leave no residue to interfere with such alloying action.
Whilea binder of nitrocellulose as specified in the Howe patent is satisfactory in most cases, yet, due to the nature of the material, it volatilizes with little explosions in the neighborhood of 130 0. Such action on the part of the binder has the disadvantage that the aluminum powder, or other coating metal,-
may be blown or loosened from the surface of the material bein coated with the result that the coating may no be as adherent as it other: wise might be. Another drawback in the use of nitrocellulose binders is found in the nature of the material itself. Such binders have a fire hazard which must be guarded against.
In accordance with my invention a process. of providing protective coatings may be carried out with a binder which will evaporate quickly at not too low a temperature leaving .no residue whatsoever to interfere with the; coating process and which has no explosive Application filed November 16, 1929. Serial No. 407,795.
obtained by the reaction of-glycerine and phthalic anhydride. A resin of this type in the form of a thin film, when heated in the air to about 380 C., evaporates quickly without leaving any carbonaceous residue. The glycerine disappears as carbon dioxide and water; the phthalic anhydride probably as such. Such a resin does not explode or confiagrate as does nitrocellulose, and unlike most of the organic binders, does not leave a tarry residue which prevents the aluminum from coming into chemical contact with the foundation metal to be coated, Actual work with paints containing aluminum powder suspended in alkyd resins as the binding metal shows that calorizing with such a mixture is superior to the methods at present used.
In carrying my invention into died I may use a paint comprising aluminum powder, or any other coating metal in the powdered or granular form, and any volatilizable alkyd resin as the binder. The resin may be dissolved in a suitable solvent to produce a solution of the desired viscosity. The .desired coating metal is suspended in this medium. While any alkyd resin may be employed as the binder, I prefer to use a resin obtained by the interreaction of equal molecular proportions of glycerine and phthalic anhydride as such a resin when used as the binding medium has given very satisfactory results. The preparation of such a resin is well known in the art.
The process of calorizing which 1 employ is that set forth in the above-mentioned Howe patent. All the advantages mentioned in this patent may be obtained by the use of my process without any of the attendant disadvantages of nitrocellulose binders as set forth above and a markedly superior process and. product result.
5 sists in covering the surface of the founda- What I claim as new and desire to secure by Letters Patent of the United States is:
l. The process of protecting metallic articles from oxidation or corrosion which consists in covering the surface of the article with a mixture of another metal in powdered form and a substantially volatilizable alkyd resin binder, and then firing at a temperature which will cause the powdered metal to alloy with the metal of the article.
2. The process of protecting metallic articles from oxidation or corrosion which consists in covering the surface to be protected with a powdered metal adapted to form an oxidation or corrosion resisting alloy with the metal on the article, said powdered covering metal being applied, at ordinary temperatures in combination with a substantiallywolatili zable alkyd resin binder, and then firing at a temperature which will cause the covering metal to alloy with the metal of the article.
3. The process of protecting metallic articles from oxidation and corrosion which consists in covering at ordinary temperatures the surface of the article with a mixture of aluminum powder and a liquid consisting of a substantially volatilizable alkyd resin and a volatile solvent, and'then firing at'a temperature which will cause the aluminum to alloy with the metal of the article.
4. The process of protecting metallic articles from oxidation or corrosion which consists in covering-the article with a coating composed of aluminum powder and a binder having a substantially volatilizable alkyd resin base, dryiflg .the coating, and then firing it at a temperature which will cause the aluminum to alloy with the metal of the article p 5. The process of protecting metallic articles from oxidation or corrosion which consists in covering the articles at ordinary temperatures with a coating composed ofaluminum powder and a liquid alkydresin binder which wets and firmly adheres to metals at ordinary temperatures and volatilizes at higher temperatures, drying the coating, and then firing at a temperature at I which the aluminum alloys with the metal of the article, said temperature being abovethat at which the binder volatilizes.
6. The process of protecting a foundation metal from oxidation or corrosion which contion metal with a mixture" of aluminum powder and a liquid consisting of a glycerine-' phthalate resm and a volatilesolvent, and then firing at a tem erature which will cause the aluminum to a 'oy with the foundation metal.
In witness whereof, I have hereunto set my hand this 15th day of November, 1929.
JAMES G. E. WRIGHT.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US407795A US1829623A (en) | 1929-11-16 | 1929-11-16 | Process of treating metals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US407795A US1829623A (en) | 1929-11-16 | 1929-11-16 | Process of treating metals |
Publications (1)
Publication Number | Publication Date |
---|---|
US1829623A true US1829623A (en) | 1931-10-27 |
Family
ID=23613554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US407795A Expired - Lifetime US1829623A (en) | 1929-11-16 | 1929-11-16 | Process of treating metals |
Country Status (1)
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US (1) | US1829623A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2492269A (en) * | 1949-12-27 | Fluid cooled member for blast | ||
US2541813A (en) * | 1947-11-08 | 1951-02-13 | Gen Electric | Calorizing process |
US2604414A (en) * | 1948-09-30 | 1952-07-22 | Du Pont | Translucent metallic enamel and a process of making it |
DE761518C (en) * | 1936-01-28 | 1953-02-23 | Walter Baur | Process for the production of metallic coatings on iron sheets or strips |
US3045301A (en) * | 1958-12-29 | 1962-07-24 | Gen Motors Corp | Coated metallic insert in mold |
US4228203A (en) * | 1978-01-27 | 1980-10-14 | Toyo Kogyo Co., Ltd. | Method of forming aluminum coating layer on ferrous base alloy workpiece |
US6274200B1 (en) | 1998-09-11 | 2001-08-14 | Boeing North American, Inc. | Method for preparing pre-coated ferrous-alloy components and components prepared thereby |
US20050104488A1 (en) * | 2003-11-14 | 2005-05-19 | Hunt Stacy A. | Dishwaser with electrocoated dish rack |
-
1929
- 1929-11-16 US US407795A patent/US1829623A/en not_active Expired - Lifetime
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2492269A (en) * | 1949-12-27 | Fluid cooled member for blast | ||
DE761518C (en) * | 1936-01-28 | 1953-02-23 | Walter Baur | Process for the production of metallic coatings on iron sheets or strips |
US2541813A (en) * | 1947-11-08 | 1951-02-13 | Gen Electric | Calorizing process |
US2604414A (en) * | 1948-09-30 | 1952-07-22 | Du Pont | Translucent metallic enamel and a process of making it |
US3045301A (en) * | 1958-12-29 | 1962-07-24 | Gen Motors Corp | Coated metallic insert in mold |
US4228203A (en) * | 1978-01-27 | 1980-10-14 | Toyo Kogyo Co., Ltd. | Method of forming aluminum coating layer on ferrous base alloy workpiece |
US6274200B1 (en) | 1998-09-11 | 2001-08-14 | Boeing North American, Inc. | Method for preparing pre-coated ferrous-alloy components and components prepared thereby |
US6494972B1 (en) | 1998-09-11 | 2002-12-17 | Boeing North American, Inc. | Method for preparing pre-coated ferrous alloys and ferrous components prepared thereby |
US20050104488A1 (en) * | 2003-11-14 | 2005-05-19 | Hunt Stacy A. | Dishwaser with electrocoated dish rack |
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