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US3276893A - Pigmented metal powder - Google Patents

Pigmented metal powder Download PDF

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Publication number
US3276893A
US3276893A US29909063A US3276893A US 3276893 A US3276893 A US 3276893A US 29909063 A US29909063 A US 29909063A US 3276893 A US3276893 A US 3276893A
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Prior art keywords
powder
metal
alloy
pigmented
lazurite
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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Inventor
Joseph F Quaas
John P Broderick
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Eutectic Welding Alloys Corp
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Eutectic Welding Alloys Corp
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    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06Metallic material
    • C23C4/08Metallic material containing only metal elements
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; MISCELLANEOUS COMPOSITIONS; MISCELLANEOUS APPLICATIONS OF MATERIALS
    • C09CTREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; PREPARATION OF CARBON BLACK; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/62Metallic pigments or fillers
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/60Particles characterised by their size
    • C01P2004/61Micrometer sized, i.e. from 1-100 micrometer
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/80Particles consisting of a mixture of two or more inorganic phases
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/60Optical properties, e.g. expressed in CIELAB-values

Description

United States Patent 3,276,893 PIGMENTED METAL POWDER Joseph F. Quaas, Island Park, and John P. Broderick, Bayside, N.Y., assignors to Eutectic Welding Alloys Corporation, Flushing, N.Y., a corporation of New York No Drawing. Filed July 31, 1963, Ser. No. 299,090 6 Claims. (Cl. 106-290) This invention relates to a colored metal powder for flame spraying upon metal surfaces, and it more particularly relates to a blue powder.

Protective and decorative coatings are applied to metal surfaces by flame spraying finely divided metal powders upon them. It is advantageous to color these powders to identify them, and it is also advantageous'to incorporate fluxes in the powders for improving their wetting action.

In accordance with this invention, the mineral pigment lazurite or lapis lazuli is used to color a finely divided mesh metal powder. Such a pigmented powder incorporating minute amounts of from as low as 0.1 to 1.0% by weight of lazurite has remarkably effective wetting ability and self-fluxing action when flame sprayed, and is also readily identified by virtue of its azure blue color. The exact reason for the aforementioned phemenona is not completely understood, but it is believed that its lowering of surface tension might be attributable to the incorporation of some sodium sulfide in the lapis lazuli. The silicates in the lazurite probably promote fluxing and protection in the form of a slag during and after deposition. Its inorganic nature and high melting temperature prevent it from decomposing at normal flame spraying temperatures.

The mineral lazurite or lapis lazuli has been used since ancient times for jewelry and other ornamental purposes. Ground to powder it forms the pigment ultramarine, now, however largely superseded by artificial preparations. Lapis lazuli is a mixture of minerals, lazurite being the chief component. This mineral is isometric, and chemically a sodium, calcium, aluminum, sulfochlorosilicate. Lapis lazuli has a hardness of -5.5; specific gravity, 2.4; color, various shades of blue; luster, vitreous to greasy; translucent to opaque. Localities are Afghanistan, Siberia, Chile, Italy and California.

In applying this pigment to metal powders the natural occurring stone is pulverized to sub-micron fineness and suspended in a liquid vehicle, such as water, to act as an inorganic pigment. Its chemistry may also be described as follows:

3 mol-s of sodium aluminum silicate;

1 mol of sodium sulfide.

Powder which can be pigmented with lapis lazuli or lazurite with beneficial effects refluxing are those alloy systems covered by the B-Ni-Cr. classifications listed in the Brazing Manual (page 32), published by the American Welding Society, copyright 1955. The particle sized distribution encompasses material finer than mesh or down but held on a 325 mesh screen. That is, passing through a 150 mesh screen but retained on a 325 mesh screen.

Other alloy systems to be treated in like fashion are those consisting of Ni-B, Ni-ScB, Ni-Si and Ni-P, and the Stellite alloy systems including cobalt-chromium and tungsten and also nickel-cobalt base alloy ssytems.

What is claimed is:

1. A pigmented metal alloy powder consisting essentially of a finely divided metal alloy powder of approxi mately from 150v to 325 mesh particle size and an amount sufiicient to color said metal alloy powder of a coating of lazurite.

2. A pigmented metal alloy powder as set forth in claim 1 wherein said lazurite is incorporated in finely divided lapis lazuli.

3. A pigmented metal alloy powder as set forth in claim 1 wherein said lazurite comprises from 0.1% to 1.0% by weight of said powder.

4. A pigmented metal alloy powder as set forth in claim 1 wherein said powder is selected from the group consisting of nickel, cobalt and chromium alloys.

5. A pigmented metal alloy powder as set forth in claim 1 wherein said powder is a nickel alloy.

6. A pigmented metal alloy powder as set forth in claim 5 wherein said lazurite comprises approximately from 0.1% to 1.0% by weight of said powder.

References Cited by the Examiner UNITED STATES PATENTS 3,111,497 11/1963 Haas 106290 TOBIAS E. LEVOW, Primary Examiner.

I. POER, Assistant Examiner.

Claims (1)

1. PIGMENTED METAL ALLOY POWDER CONSISTING ESSENTIALLY OF A FINELY DIVIDED METAL ALLOY POWDER OF APPROXIMATELY FROM 150 TO 325 MESH PARTICLE SIZE AND AN AMOUNT SUFFICIENT TO COLOR SAID METAL ALLOY POWDER OF A COATING OF LAZURITE.
US3276893A 1963-07-31 1963-07-31 Pigmented metal powder Expired - Lifetime US3276893A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3428442A (en) * 1966-09-22 1969-02-18 Eutectic Welding Alloys Coated spray-weld alloy powders
US3617358A (en) * 1967-09-29 1971-11-02 Metco Inc Flame spray powder and process
US3998779A (en) * 1973-05-21 1976-12-21 Chromalloy American Corporation Coating method and composition for the sacrificial protection of metal substrates
US4375373A (en) * 1978-12-29 1983-03-01 Toro Ganryo Kogyo Co., Ltd. Method of coating inorganic pigments (ultramarine and bronze powder) with dense amorphous silica

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3111497A (en) * 1960-08-12 1963-11-19 Kenner Products Company Aqueous polyvinyl alcohol coating composition containing aluminum glitter pigment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3111497A (en) * 1960-08-12 1963-11-19 Kenner Products Company Aqueous polyvinyl alcohol coating composition containing aluminum glitter pigment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3428442A (en) * 1966-09-22 1969-02-18 Eutectic Welding Alloys Coated spray-weld alloy powders
US3617358A (en) * 1967-09-29 1971-11-02 Metco Inc Flame spray powder and process
US3998779A (en) * 1973-05-21 1976-12-21 Chromalloy American Corporation Coating method and composition for the sacrificial protection of metal substrates
US4375373A (en) * 1978-12-29 1983-03-01 Toro Ganryo Kogyo Co., Ltd. Method of coating inorganic pigments (ultramarine and bronze powder) with dense amorphous silica

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