US2726170A - Method of coating steel with nickel-boron - Google Patents
Method of coating steel with nickel-boron Download PDFInfo
- Publication number
- US2726170A US2726170A US454626A US45462654A US2726170A US 2726170 A US2726170 A US 2726170A US 454626 A US454626 A US 454626A US 45462654 A US45462654 A US 45462654A US 2726170 A US2726170 A US 2726170A
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- United States
- Prior art keywords
- nickel
- steel
- boron
- coating
- precipitate
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- 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
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B35/00—Boron; Compounds thereof
- C01B35/02—Boron; Borides
- C01B35/04—Metal borides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/922—Static electricity metal bleed-off metallic stock
- Y10S428/9335—Product by special process
- Y10S428/936—Chemical deposition, e.g. electroless plating
Definitions
- This invention relates generally to methods of coating metals with nickel-boron and similar alloys.
- NizB nickel boride
- CozB cobalt boride
- the reactants i. e., sodium borohydride and nickel or cobalt chloride or mixtures thereof
- the character of the precipitate is such that it adheres readily to steel surfaces, so that it becomes possible, in this way, to deposit nickel and cobalt borides and mixtures thereof on steel, and sinter them by heating to redness in hydrogen or other reducing atmospheres, thereby producing a bonded coating of a nickel-boron, cobalt-boron, or nickelcobalt-boron on steel.
- the boron content is about 3%.
- the boron content of NizB is about 8 to 9%.
- a mixture of nickel boride and nickel hydroxide could be employed, which, when heated in a reducing atmosphere gave a nickel-boron alloy of any desired composition.
- the gelatinous nature of nickel hydroxide aided in the adherence of the coating to the steel parts.
- the nickel boride-nickel hydroxide mixture may be prepared by addition of sodium borohydride-sodium hydroxide mixtures to nickel chloride, the solvent being either water, ethanol, other alcohols, amines or mixture thereof.
- thickening agents have also been found useful to yield thicker layers of nickel boride (or the corresponding cobalt compound) on the steel.
- comhausal products such as carbomethoxy-cellulose, carbomethoxy-starch, lignin sulfonates, agar and related bodies.
- the method of coating steel with alloys containing nickel and boron comprising reacting a borohydride with a nickel salt in a solution selected from the group consisting of absolute ethanol, methanol, isopropyl alcohol, isopropylamine, ethylenediamine, and pyridine, to form a precipitate of nickel boride, coating the steel with said precipitate, and then heating the coated steel in a reducing atmosphere to form an alloy containing nickel and boron on the steel.
- the method of coating steel with alloys containing nickel and boron comprising reacting a mixture of sodium borohydride and sodium hydroxide with nickel chloride in a solution selected from the group consisting of water, ethanol, other alcohols, amines, and mixtures thereof, to thereby form a mixture containing nickel boride and nickel hydroxide, coating the steel with said last-named mixture, and heating the coated steel to form an alloy containing nickel and boron on the steel.
Description
United States Patent ()fifice 2,726,170 Patented Dec. 6, 1955 METHOD OF COATING STEEL WITH NICKEL-HURON James C. Warf, Torrance, and Klara H. Schaltegger, Pasadena, Calif., assignors to Superweld Corporation, North Hollywood, Calif., a corporation of California No Drawing. Application September 7, 1954, Serial No. 454,626
4 Claims. (Cl. 117-65) This invention relates generally to methods of coating metals with nickel-boron and similar alloys.
The excellent flowing properties and wear resistance of nickel-boron, cobalt-boron and nickel-cobalt-boron alloys have made these alloys particularly desirable as coatings for steel. However, the application of such allows to steel, as coatings, has always presented a diflicult problem.
It has long been known that borohydrides precipitate nickel boride (NizB) or cobalt boride (CozB) from aqueous solutions of salts of these metals. Such precipitates are well adapted for the formation of alloy coatings of the character described, but have not heretofore been used successfully for this puipose, because they do not adhere readily to steel.
We have discovered, however, that if the reactants (i. e., sodium borohydride and nickel or cobalt chloride or mixtures thereof) are first dissolved in absolute ethanol, the character of the precipitate is such that it adheres readily to steel surfaces, so that it becomes possible, in this way, to deposit nickel and cobalt borides and mixtures thereof on steel, and sinter them by heating to redness in hydrogen or other reducing atmospheres, thereby producing a bonded coating of a nickel-boron, cobalt-boron, or nickelcobalt-boron on steel.
Instead of absolute ethanol, we have found that other solvents are also useful for this purpose, such, for example, as methanol, isopropyl alcohol, isopropylamine, ethylenediamine, and pyridine. The ethanol and ethylenediamine solutions were found to be particularly stable in this connection.
In alloys of the character described, the boron content is about 3%. The boron content of NizB is about 8 to 9%. In order to lower the boron content, we found that a mixture of nickel boride and nickel hydroxide could be employed, which, when heated in a reducing atmosphere gave a nickel-boron alloy of any desired composition. The gelatinous nature of nickel hydroxide aided in the adherence of the coating to the steel parts. The nickel boride-nickel hydroxide mixture may be prepared by addition of sodium borohydride-sodium hydroxide mixtures to nickel chloride, the solvent being either water, ethanol, other alcohols, amines or mixture thereof.
The foregoing remarks apply also to mixtures of cobalt boride and cobalt hydroxide.
Other thickening agents have also been found useful to yield thicker layers of nickel boride (or the corresponding cobalt compound) on the steel. Among these are com mercial products such as carbomethoxy-cellulose, carbomethoxy-starch, lignin sulfonates, agar and related bodies.
It will be understood that various changes may be made in the methods described, and in the materials used, without departing from the spirit of the invention or scope of the appended claims.
Having thus described our invention, we claim:
1. The method of coating steel with alloys containing nickel and boron, said method comprising reacting a borohydride with a nickel salt in a solution selected from the group consisting of absolute ethanol, methanol, isopropyl alcohol, isopropylamine, ethylenediamine, and pyridine, to form a precipitate of nickel boride, coating the steel with said precipitate, and then heating the coated steel in a reducing atmosphere to form an alloy containing nickel and boron on the steel.
2. The method, as recited in claim 1, in which a hydroxide is incorporated in the reaction mixture to render the solution more gelatinous in nature.
3. The method of coating steel with alloys containing nickel and boron, said method comprising reacting sodium borohydride with nickel chloride in a solution of ethanol, to thereby form a precipitate of nickel boride having excellent adherence properties, coating the steel with said precipitate, and heating the coated steel to form an alloy containing nickel and boron on the steel.
4. The method of coating steel with alloys containing nickel and boron, said method comprising reacting a mixture of sodium borohydride and sodium hydroxide with nickel chloride in a solution selected from the group consisting of water, ethanol, other alcohols, amines, and mixtures thereof, to thereby form a mixture containing nickel boride and nickel hydroxide, coating the steel with said last-named mixture, and heating the coated steel to form an alloy containing nickel and boron on the steel.
No references cited.
Claims (1)
1. THE METHOD OF COATING STEEL WITH ALLOYS CONTAINING NICKEL AND BORON, SAID METHOD COMPRISING REACTING A BOROHYDRIDE WITH A NICKEL SALT IN A SOLUTION SELECTED FROM THE GROUP CONSISTING OF ABSOLUTE ETHANOL, METHANOL, ISOPROPYL ALCOHOL, ISOPROPYLAMINE, ETHYLENEDIAMINE, AND PYRIDINE, TO FORM A PRECIPITATE OF NICKEL BORIDE, COATING THE STEEL WITH SAID PRECIPITATE, AND THEN HEATING THE COATED STEEL IN A REDUCING ATMOSPHERE TO FORM AN ALLOY CONTAINING NICKEL AND BORON ON THE STEEL.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US454626A US2726170A (en) | 1954-09-07 | 1954-09-07 | Method of coating steel with nickel-boron |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US454626A US2726170A (en) | 1954-09-07 | 1954-09-07 | Method of coating steel with nickel-boron |
Publications (1)
Publication Number | Publication Date |
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US2726170A true US2726170A (en) | 1955-12-06 |
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US454626A Expired - Lifetime US2726170A (en) | 1954-09-07 | 1954-09-07 | Method of coating steel with nickel-boron |
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Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2922213A (en) * | 1955-01-05 | 1960-01-26 | Pechiney Prod Chimiques Sa | Process for agglomerating aluminum nitride and resultant product |
US2942990A (en) * | 1959-01-26 | 1960-06-28 | Metal Hydrides Inc | Metal plating by chemical reduction with borohydrides |
US2971865A (en) * | 1957-03-15 | 1961-02-14 | Arthur G Metchlfe | Fusible impregnation of porous metallic bodies |
US2990296A (en) * | 1958-08-05 | 1961-06-27 | Callery Chemical Co | Chemical plating of metal-boron alloys |
US3045334A (en) * | 1958-10-01 | 1962-07-24 | Du Pont | Alloy and composite metal plate |
US3051546A (en) * | 1959-09-29 | 1962-08-28 | Du Pont | Boron compounds and their preparation |
DE1137918B (en) * | 1957-01-15 | 1962-10-11 | Du Pont | Bath and process for the chemical deposition of nickel-boron or cobalt-boron alloy coatings |
US3096182A (en) * | 1958-10-01 | 1963-07-02 | Du Pont | Chemical plating solution and process for plating therewith |
US3151001A (en) * | 1962-12-04 | 1964-09-29 | United States Steel Corp | Method of treating boron coated steel to eliminate luders' bands |
US3150994A (en) * | 1958-08-05 | 1964-09-29 | Callery Chemical Co | Chemical plating of metal-boron alloys |
US3206338A (en) * | 1963-05-10 | 1965-09-14 | Du Pont | Non-pyrophoric, ferromagnetic acicular particles and their preparation |
DE1214969B (en) * | 1960-08-29 | 1966-04-21 | Bayer Ag | Bath for chemical deposition of metal coatings containing boron |
US3338726A (en) * | 1958-10-01 | 1967-08-29 | Du Pont | Chemical reduction plating process and bath |
US3392059A (en) * | 1963-10-30 | 1968-07-09 | Varta Ag | Process of producing nickel catalyst using sodium boron hydride |
US6183546B1 (en) | 1998-11-02 | 2001-02-06 | Mccomas Industries International | Coating compositions containing nickel and boron |
US20080093584A1 (en) * | 2006-10-19 | 2008-04-24 | Oh-Chul Kwon | Inhibitor of lead-induced stress corrosion cracking comprising nickel boride in secondary side of steam generator tubes in nuclear power plants and inhibition method using the same |
EP2339050A1 (en) | 2001-10-24 | 2011-06-29 | Rohm and Haas Electronic Materials LLC | Stabilizers for electroless plating solutions and methods of use thereof |
-
1954
- 1954-09-07 US US454626A patent/US2726170A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
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None * |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2922213A (en) * | 1955-01-05 | 1960-01-26 | Pechiney Prod Chimiques Sa | Process for agglomerating aluminum nitride and resultant product |
DE1137918B (en) * | 1957-01-15 | 1962-10-11 | Du Pont | Bath and process for the chemical deposition of nickel-boron or cobalt-boron alloy coatings |
US2971865A (en) * | 1957-03-15 | 1961-02-14 | Arthur G Metchlfe | Fusible impregnation of porous metallic bodies |
US2990296A (en) * | 1958-08-05 | 1961-06-27 | Callery Chemical Co | Chemical plating of metal-boron alloys |
US3150994A (en) * | 1958-08-05 | 1964-09-29 | Callery Chemical Co | Chemical plating of metal-boron alloys |
US3338726A (en) * | 1958-10-01 | 1967-08-29 | Du Pont | Chemical reduction plating process and bath |
US3096182A (en) * | 1958-10-01 | 1963-07-02 | Du Pont | Chemical plating solution and process for plating therewith |
US3045334A (en) * | 1958-10-01 | 1962-07-24 | Du Pont | Alloy and composite metal plate |
US2942990A (en) * | 1959-01-26 | 1960-06-28 | Metal Hydrides Inc | Metal plating by chemical reduction with borohydrides |
US3051546A (en) * | 1959-09-29 | 1962-08-28 | Du Pont | Boron compounds and their preparation |
DE1214969B (en) * | 1960-08-29 | 1966-04-21 | Bayer Ag | Bath for chemical deposition of metal coatings containing boron |
US3151001A (en) * | 1962-12-04 | 1964-09-29 | United States Steel Corp | Method of treating boron coated steel to eliminate luders' bands |
US3206338A (en) * | 1963-05-10 | 1965-09-14 | Du Pont | Non-pyrophoric, ferromagnetic acicular particles and their preparation |
US3392059A (en) * | 1963-10-30 | 1968-07-09 | Varta Ag | Process of producing nickel catalyst using sodium boron hydride |
US6183546B1 (en) | 1998-11-02 | 2001-02-06 | Mccomas Industries International | Coating compositions containing nickel and boron |
EP2339050A1 (en) | 2001-10-24 | 2011-06-29 | Rohm and Haas Electronic Materials LLC | Stabilizers for electroless plating solutions and methods of use thereof |
US20080093584A1 (en) * | 2006-10-19 | 2008-04-24 | Oh-Chul Kwon | Inhibitor of lead-induced stress corrosion cracking comprising nickel boride in secondary side of steam generator tubes in nuclear power plants and inhibition method using the same |
US7782994B2 (en) * | 2006-10-19 | 2010-08-24 | Korea Atomic Energy Research Institute | Inhibitor of lead-induced stress corrosion cracking comprising nickel boride in secondary side of steam generator tubes in nuclear power plants and inhibition method using the same |
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