US3247028A - Processes for improving the corrosion resistance of ni-co-metal coatings containing boron - Google Patents
Processes for improving the corrosion resistance of ni-co-metal coatings containing boron Download PDFInfo
- Publication number
- US3247028A US3247028A US203754A US20375462A US3247028A US 3247028 A US3247028 A US 3247028A US 203754 A US203754 A US 203754A US 20375462 A US20375462 A US 20375462A US 3247028 A US3247028 A US 3247028A
- Authority
- US
- United States
- Prior art keywords
- aqueous solution
- improving
- corrosion resistance
- liter
- metal
- 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
Links
- 238000005260 corrosion Methods 0.000 title claims description 14
- 230000007797 corrosion Effects 0.000 title claims description 14
- 238000000034 method Methods 0.000 title claims description 13
- 229910052751 metal Inorganic materials 0.000 title claims description 11
- 239000002184 metal Substances 0.000 title claims description 11
- 229910052796 boron Inorganic materials 0.000 title description 11
- 238000000576 coating method Methods 0.000 title description 9
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 title description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 18
- 239000007864 aqueous solution Substances 0.000 claims description 14
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 9
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Chemical compound O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims description 8
- 238000007747 plating Methods 0.000 claims description 7
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 150000001845 chromium compounds Chemical class 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 2
- UVZICZIVKIMRNE-UHFFFAOYSA-N thiodiacetic acid Chemical compound OC(=O)CSCC(O)=O UVZICZIVKIMRNE-UHFFFAOYSA-N 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 241000276498 Pollachius virens Species 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- JJFNJZGXHWYGMQ-UHFFFAOYSA-N [Ni].B#[Co] Chemical compound [Ni].B#[Co] JJFNJZGXHWYGMQ-UHFFFAOYSA-N 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- QDWJUBJKEHXSMT-UHFFFAOYSA-N boranylidynenickel Chemical compound [Ni]#B QDWJUBJKEHXSMT-UHFFFAOYSA-N 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- HWSZZLVAJGOAAY-UHFFFAOYSA-L lead(II) chloride Chemical compound Cl[Pb]Cl HWSZZLVAJGOAAY-UHFFFAOYSA-L 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-M phosphinate Chemical compound [O-][PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-M 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000012279 sodium borohydride Substances 0.000 description 1
- 229910000033 sodium borohydride Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
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
-
- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
- C23C18/34—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents
-
- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/48—Coating with alloys
-
- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/48—Coating with alloys
- C23C18/50—Coating with alloys with alloys based on iron, cobalt or nickel
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
- C23C22/33—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds containing also phosphates
Definitions
- the object of the invention is to provide a process for improving the corrosion resistance of chemically deposited Ni-Co-metal coatings containing boron, characterized by after-treating the chemically plated metal surfaces with aqueous solutions containing a hexavalent chromium compound, preferably chromic acid and, if desired, phosphoric acid or its salts.
- a hexavalent chromium compound preferably chromic acid and, if desired, phosphoric acid or its salts.
- the duration of the after-treatment, the concentration of the hexavalent chromium compounds as well as the bath temperature can be varied within a wide range.
- the temperature of the after-treatment bath can lie between room temperature and boiling temperature, the concentration of, for example chromic acid can be 1 to 300 g./liter.
- 0.1 to 2% phosphoric acid are sufficient.
- Example 1 In a chemical plating bath of the following composition:
- the corrosion test was carried out using the corrosion apparatus Testor of the Firma 'Kohler, Lipperode, at
- the samples were suspended from glass hooks in the apparatus. During the test period a thin layer of condensed water was always present on the sample surface. The duration of the test was 15 days. The samples were examined first at short intervals, later at longer intervals and the degree of rusting was estimated as a percentage of the total surface. The individual degrees of rusting in proportion to the period of testing are shown in the table.
- metihanol iron plates were provided with a Co-Ni-B coat- "irrq.
- the iron plates had an area of 1 dm. each.
- the composition of the coating was approximately 47% Co, "51% Ni and 2% B.
- the after-treatment of the plates 15 as well as the corrosion test were carried out as described in Example 1.
- Example 3 Bust in percent of surface after 15 days Residing Bath G. Ni-B/dm time (ca. 1.1400 (ea. (ca. 1.0184 (ea. (ca. 1.0216 (ca. 15
- the samples were subsequently suspended for 150 hours in an aerosol chamber with 0.3% NaCl spray. During the duration of the experiment no further rust formation occurred.
- Example 4 7 0 Iron plates were provided with a Ni-B layer as described in Example 1. The after-treatment of the plates took place at C. and with varying stays in aqueoussolntions of A non after-treated iron plate having a Ni-B coat ng of 2.0540 g. Ni-B/dm. showed after 12 days 4% rust (expressed as a percentage of the surface).
- a process for improving the corrosion resistance of metal coatings containing boron and a metal selected from the group consisting of Ni, Co, and Ni-Co-systems chemically deposited from a plating solution containing as essential ingredients a metal selected from the group consisting of Ni, Co, and Ni Co-systems and a borohydride which comprises treating the chemically plated surfaces with an aqueous solution containing a hexavalent chromium compound, the chromium compound being present in an amount between 1 to about 300 g./l. of chromic acid.
- said aqueous solution additionally contains a member selected from the group consisting of phosphoric acid and soluble salts thereof, the phosphoric acid being present in an amount between about 1 and 20 g./l. of aqueous solution.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Electroplating Methods And Accessories (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF34288A DE1202092B (de) | 1961-06-28 | 1961-06-28 | Verfahren zur Verbesserung der Korrosions-eigenschaften von chemisch abgeschiedenen, Bor enthaltenden Metallueberzuegen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3247028A true US3247028A (en) | 1966-04-19 |
Family
ID=7095487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US203754A Expired - Lifetime US3247028A (en) | 1961-06-28 | 1962-06-20 | Processes for improving the corrosion resistance of ni-co-metal coatings containing boron |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3247028A (de) |
| BE (1) | BE619261A (de) |
| CH (1) | CH415231A (de) |
| DE (1) | DE1202092B (de) |
| GB (1) | GB938097A (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3917464A (en) * | 1973-07-20 | 1975-11-04 | Us Army | Electroless deposition of cobalt boron |
| EP0094127A1 (de) * | 1982-05-06 | 1983-11-16 | Koninklijke Philips Electronics N.V. | Gegenstand mit einer Nickel-Phosphorlegierungsschicht und überzogen mit einer Schutzschicht |
| US4696724A (en) * | 1981-06-26 | 1987-09-29 | Nisshin Steel Co., Ltd. | Surface treatment of high-nickel/iron alloy steel plate for LNG or LPG tanks |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2477310A (en) * | 1947-07-23 | 1949-07-26 | Clark Thread Co | Process and composition for producing a dyeable corrosion resistant surface on zinc and high zinc alloys |
| US2497905A (en) * | 1945-03-03 | 1950-02-21 | Rheem Mfg Co | Coating zinc or cadmium to impart corrosion and abrasion resistance |
| US2516685A (en) * | 1944-04-19 | 1950-07-25 | American Chem Paint Co | Process of preparing iron and aluminum surfaces to receive organic coatings and solution therefor |
| US2819193A (en) * | 1952-06-24 | 1958-01-07 | Parker Rust Proof Co | Solution and process for treating metal surfaces |
| US2975073A (en) * | 1958-02-06 | 1961-03-14 | Dow Chemical Co | Corrosion resistance of electroless nickel plate |
| US2990296A (en) * | 1958-08-05 | 1961-06-27 | Callery Chemical Co | Chemical plating of metal-boron alloys |
| US2996353A (en) * | 1959-04-01 | 1961-08-15 | Du Pont | Sodium fluochromate and the process for preparing the same |
| US3062666A (en) * | 1958-11-26 | 1962-11-06 | Du Pont | Bath compositions for the chemical reductive plating of nickel-boron and cobalt-boron alloys |
| US3088846A (en) * | 1962-01-24 | 1963-05-07 | Gen Am Transport | Processes of treating nickel-phosphorus alloy coatings and the resulting modified coatings |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2106904A (en) * | 1936-02-21 | 1938-02-01 | New Jersey Zinc Co | Coating malleable non-noble heavy metals |
| GB819624A (en) * | 1957-02-14 | 1959-09-09 | American Chem Paint Co | Methods of increasing the corrosion-resistance of soldered metal assemblies |
-
1961
- 1961-06-28 DE DEF34288A patent/DE1202092B/de active Pending
-
1962
- 1962-05-24 CH CH627362A patent/CH415231A/de unknown
- 1962-06-20 US US203754A patent/US3247028A/en not_active Expired - Lifetime
- 1962-06-22 BE BE619261A patent/BE619261A/fr unknown
- 1962-06-28 GB GB24864/62A patent/GB938097A/en not_active Expired
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2516685A (en) * | 1944-04-19 | 1950-07-25 | American Chem Paint Co | Process of preparing iron and aluminum surfaces to receive organic coatings and solution therefor |
| US2497905A (en) * | 1945-03-03 | 1950-02-21 | Rheem Mfg Co | Coating zinc or cadmium to impart corrosion and abrasion resistance |
| US2477310A (en) * | 1947-07-23 | 1949-07-26 | Clark Thread Co | Process and composition for producing a dyeable corrosion resistant surface on zinc and high zinc alloys |
| US2819193A (en) * | 1952-06-24 | 1958-01-07 | Parker Rust Proof Co | Solution and process for treating metal surfaces |
| US2975073A (en) * | 1958-02-06 | 1961-03-14 | Dow Chemical Co | Corrosion resistance of electroless nickel plate |
| US2990296A (en) * | 1958-08-05 | 1961-06-27 | Callery Chemical Co | Chemical plating of metal-boron alloys |
| US3062666A (en) * | 1958-11-26 | 1962-11-06 | Du Pont | Bath compositions for the chemical reductive plating of nickel-boron and cobalt-boron alloys |
| US2996353A (en) * | 1959-04-01 | 1961-08-15 | Du Pont | Sodium fluochromate and the process for preparing the same |
| US3088846A (en) * | 1962-01-24 | 1963-05-07 | Gen Am Transport | Processes of treating nickel-phosphorus alloy coatings and the resulting modified coatings |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3917464A (en) * | 1973-07-20 | 1975-11-04 | Us Army | Electroless deposition of cobalt boron |
| US4696724A (en) * | 1981-06-26 | 1987-09-29 | Nisshin Steel Co., Ltd. | Surface treatment of high-nickel/iron alloy steel plate for LNG or LPG tanks |
| EP0094127A1 (de) * | 1982-05-06 | 1983-11-16 | Koninklijke Philips Electronics N.V. | Gegenstand mit einer Nickel-Phosphorlegierungsschicht und überzogen mit einer Schutzschicht |
Also Published As
| Publication number | Publication date |
|---|---|
| CH415231A (de) | 1966-06-15 |
| DE1202092B (de) | 1965-09-30 |
| GB938097A (en) | 1963-09-25 |
| BE619261A (fr) | 1962-10-15 |
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