US2548420A - Method of producing lustrous zinc - Google Patents
Method of producing lustrous zinc Download PDFInfo
- Publication number
- US2548420A US2548420A US46562A US4656248A US2548420A US 2548420 A US2548420 A US 2548420A US 46562 A US46562 A US 46562A US 4656248 A US4656248 A US 4656248A US 2548420 A US2548420 A US 2548420A
- Authority
- US
- United States
- Prior art keywords
- article
- zinc
- bath
- chromic acid
- silicate
- 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
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims description 52
- 239000011701 zinc Substances 0.000 title claims description 52
- 229910052725 zinc Inorganic materials 0.000 title claims description 52
- 238000000034 method Methods 0.000 title claims description 22
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Chemical compound O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims description 24
- 238000005260 corrosion Methods 0.000 claims description 17
- 230000007797 corrosion Effects 0.000 claims description 17
- 239000004115 Sodium Silicate Substances 0.000 claims description 11
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 11
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 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 22
- 238000011282 treatment Methods 0.000 description 17
- 238000000576 coating method Methods 0.000 description 14
- 239000000243 solution Substances 0.000 description 13
- 239000011248 coating agent Substances 0.000 description 11
- 239000000080 wetting agent Substances 0.000 description 8
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 7
- 229910052914 metal silicate Inorganic materials 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 4
- 235000006200 Glycyrrhiza glabra Nutrition 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000003518 caustics Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 2
- 101100348017 Drosophila melanogaster Nazo gene Proteins 0.000 description 2
- 241000202807 Glycyrrhiza Species 0.000 description 2
- 235000001453 Glycyrrhiza echinata Nutrition 0.000 description 2
- 235000017382 Glycyrrhiza lepidota Nutrition 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 229940010454 licorice Drugs 0.000 description 2
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- -1 primary alcohol sulfate Chemical class 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 150000004760 silicates Chemical class 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 244000303040 Glycyrrhiza glabra Species 0.000 description 1
- 235000017443 Hedysarum boreale Nutrition 0.000 description 1
- 235000007858 Hedysarum occidentale Nutrition 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 241001092473 Quillaja Species 0.000 description 1
- 235000009001 Quillaja saponaria Nutrition 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 229960000583 acetic acid Drugs 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 150000001845 chromium compounds Chemical class 0.000 description 1
- ABXXWVKOBZHNNF-UHFFFAOYSA-N chromium(3+);dioxido(dioxo)chromium Chemical class [Cr+3].[Cr+3].[O-][Cr]([O-])(=O)=O.[O-][Cr]([O-])(=O)=O.[O-][Cr]([O-])(=O)=O ABXXWVKOBZHNNF-UHFFFAOYSA-N 0.000 description 1
- VQWFNAGFNGABOH-UHFFFAOYSA-K chromium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Cr+3] VQWFNAGFNGABOH-UHFFFAOYSA-K 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000012362 glacial acetic acid Substances 0.000 description 1
- 239000001947 glycyrrhiza glabra rhizome/root Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- POWFTOSLLWLEBN-UHFFFAOYSA-N tetrasodium;silicate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-][Si]([O-])([O-])[O-] POWFTOSLLWLEBN-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
Definitions
- This invention relates to lustrous zincplates or coatings and to a process for brightening and sealing zinc surfaces.
- Another method of treating zincsurfaces is the so-called bright dip wherein the zinc article or an article containing a zinc coating is dipped in a bath of chromic acid anhydride, sodium sulfate and nitric acid.
- This process hasthe disadvantage that the articles are hard to rinse and the bath has no substantial passivating effect .on the zinc.
- One of the objects of the present invention is to provide a new and improved method of treating zinc articles, or articles containing a surface coating of zinc, to produce a lustrous zinc surface possessing excellent brightness and unusual resistance against corrosion.
- a further object of the invention is to produce new and improved corrosion resistant zinc sur-' face articles. Other objects will appear hereinafter.
- a bath containing chromic acid and of the type which forms a yellow-brown iridescent stain on the zinc I (2) Rinsing the first bath from the zinc coating with wateror other suitable liquid; .and (3) While the coating is still wet,v that is, before it has been completely dried, applying thereto, preferably in the hot state degrees F.-18,0 degrees F.), a solution of sodium silicate.
- the added resistance to corrosion which is produced by the practicebf the present invention is due at least in part to the fact that the treatment in the chromic acid bath produces a gelatinous film whichlwhen subjected to treatment with the silicate before drying undergoes a chemical reaction to produce a different type film of superior corrosion resistance.
- Example Zinc is plated onto sheet steel in a conventional 2 grams per liter of zinc" dust are stirred into,
- the plated article is'then rinsed and dried, or without drying is immersed in a bath having the following composition at room temperature ('75 degrees F.)
- the zinc plated article is immersed in this bath from 1 to seconds and is then thoroughly rinsed and removed from the bath. It will be coated with a yellow-browri' iridescent stain, which apparently consists of chromic hydroxide (Cr(O'H)3) and various chromium chromates.
- Tergitol Penetrant O8 is a, synthetic primary alcohol sulfate used as a wetting agent and .penetrant in concentrated solutions of alkalies, acids and salts. (See The Chemical and. Engineering Dictionary published by The Chemical Publishing Company of N. Y., Inc.). Instead of Tergitol O8, isopropyl naphthalene sulfonic acid sodium sulfate may be employed in approximately the same proportions, and other wetting agents may be used which have a wetting and penetrating action. The presence of the Wetting agent apparently speeds up or accelerates the treatment in the second bath.
- the N grade sodium silicate referred to in the above example is a commercial silicate of soda having the approximate formula NazO-3.3SiO2.
- the weight ratio of SiOz to NazO is approximately 3.22.
- This grade of sodium silicate contains about 8.90% NazO and about 28.7% SiOz.
- a hot bath is used in this treatment in order to avoid gelatinization of the sodium silicate.
- the action of the second bath on the product obtained from the. first bath is almost instantaneous, that is, itrequires only about 2 to 30 seconds.
- sodium silicate instead of sodium silicate other water soluble silicates and polysilicates may be employed to effect a similar result.
- the ratio of M to S102 in these silicates may vary within relatively wide limits.
- sodium metasilicate and/or sodium orthosilicate may be used.
- the licorice powder is employed as a wetting agent to increase rinsability. Any other wetting agent which is stable in the presence of chromic acid may be employed. Another example of a wetting agent is quillaja extract. As will be understood, licorice powder is powdered licorice root.
- the per-sulfate constituent of the first bath also be varied somewhat and other per-sulfates, including potassium persulfate and sodium persulfate may be used.
- the invention produces results that have never been obtained heretofore in the protection of zinc surfaces having unusual luster and corrosion resistance.
- the treatment described is particularly applicable to zinc plated articles and has been successfullyused in the treatmentof articles plated either in alkaline or acid baths.
- the expression zinc plated article is employed herein to describe a zinc coated article in which the zinc coating has been applied by an electroplating process.
- steps which comprise treating a zinc surfaced article with a chromic acid solution to form thereon a yellow-brown iridescent stain, rinsing the excess chromic acid solution from the article so treated, and before the rinsed article is completely dry subjecting it to treatment with an aqueous solution of an alkaline metal silicate.
- steps which comprise treating a zinc surfaced article with a chromic acid solution to form thereon a yellow-brown iridescent stain, rinsing the excess chromic acid solution from the article so treated, and before the rinsed article is completely dry subjecting it to treatment with an aqueous solution of an alkaline metal silicate containing a wetting agent.
- the process of producing a zinc surfaced article resistant to corrosion which comprises immersing .a zinc surfaced article in a bath consisting essentially of 34 to 46 ounces per gallon of chromic acid to form on said article a yellowbrown iridescent stain, rinsing the excess chromic acid solution from the article, and then immersing the article in a second bath which consists essentially of an alkaline solution of a metal silicate.
- a process of producing a lustrous zinc surfaced article resistant to corrosion which comprises immersing a zinc surfaced article in a bath consisting essentially of 34 to 46 ounces per gallon of chromic acid, 3.4 to 4.6 ounces per gallon of ammonium persulfate, and a stable wetting agent in amounts efi'ective to increase rinsability, rinsing the article, and then immersing it in an a ka i e 1 16 31 32 bath consisting essentially of 1 ounce to 12 ounces per gallon of commercial sodium silicate in water.
- a zinc surfaced article containing a coating resulting from the treatment of the article with a chromic acid solution to form thereon a yellowbrown iridescent stain, rinsing the excess chromic acid solution from the article and before the rinsed article is completely dry treating it with an alkaline metal silicate in aqueous solution heated to a temperature in the range of 120 degrees F. to 180 degrees F.
- a zinc surfaced article containing a coating of a gelatinous chromium compound film reacted in situ with a water soluble metal silicate applied in a wet state.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE490295D BE490295A (en(2012)) | 1948-08-27 | ||
| US46562A US2548420A (en) | 1948-08-27 | 1948-08-27 | Method of producing lustrous zinc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US46562A US2548420A (en) | 1948-08-27 | 1948-08-27 | Method of producing lustrous zinc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2548420A true US2548420A (en) | 1951-04-10 |
Family
ID=21944109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US46562A Expired - Lifetime US2548420A (en) | 1948-08-27 | 1948-08-27 | Method of producing lustrous zinc |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2548420A (en(2012)) |
| BE (1) | BE490295A (en(2012)) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2631951A (en) * | 1950-11-30 | 1953-03-17 | Poor & Co | Corrosion protected zinc products and method of producing them |
| US2665232A (en) * | 1950-12-18 | 1954-01-05 | United States Steel Corp | Method and solution for treating zinc surfaces to inhibit formation of white rust |
| US2681873A (en) * | 1954-02-25 | 1954-06-22 | George L Deniston | Production of black oxide films on aluminum |
| US2793967A (en) * | 1953-06-02 | 1957-05-28 | Poor & Co | Sealing composition and method |
| US2796372A (en) * | 1953-05-07 | 1957-06-18 | Poor & Co | Corrosion protecting metal finishing composition |
| US2887418A (en) * | 1956-12-24 | 1959-05-19 | Dow Chemical Co | Composition for and method of chrome pickling of magnesium shapes |
| DE1084103B (de) * | 1953-03-13 | 1960-06-23 | Armco Int Corp | Verfahren zur Erzeugung korrosionsbestaendiger ungefaerbter und metallglaenzender Zink- oder Aluminiumoberflaechen |
| FR2382515A1 (en(2012)) * | 1978-02-14 | 1978-09-29 | Int Lead Zinc Res | |
| US4328046A (en) * | 1980-10-14 | 1982-05-04 | Western Electric Co., Inc. | Chromate conversion coatings |
| US4367099A (en) * | 1981-06-15 | 1983-01-04 | Occidental Chemical Corporation | Trivalent chromium passivate process |
| US5178690A (en) * | 1991-05-13 | 1993-01-12 | Enthone-Omi Inc. | Process for sealing chromate conversion coatings on electrodeposited zinc |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1966203A (en) * | 1932-03-26 | 1934-07-10 | American Chem Paint Co | Method of and material for removing soldering fluxes |
| GB453226A (en) * | 1935-02-01 | 1936-09-01 | Hubert Sutton | Improvements in or relating to the impregnation of metallic objects with a filling or sealing composition |
| US2154469A (en) * | 1934-12-17 | 1939-04-18 | Du Pont | Bright dip |
| US2186579A (en) * | 1933-06-28 | 1940-01-09 | Udylite Corp | Method of brightening metals electronegative to iron |
| US2303399A (en) * | 1939-05-01 | 1942-12-01 | Hall Lab Inc | Alkaline detergent |
| US2433723A (en) * | 1943-12-30 | 1947-12-30 | Theophil J Wieczorek | Solution for smoothing zinc surfaces |
-
0
- BE BE490295D patent/BE490295A/xx unknown
-
1948
- 1948-08-27 US US46562A patent/US2548420A/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1966203A (en) * | 1932-03-26 | 1934-07-10 | American Chem Paint Co | Method of and material for removing soldering fluxes |
| US2186579A (en) * | 1933-06-28 | 1940-01-09 | Udylite Corp | Method of brightening metals electronegative to iron |
| US2154469A (en) * | 1934-12-17 | 1939-04-18 | Du Pont | Bright dip |
| GB453226A (en) * | 1935-02-01 | 1936-09-01 | Hubert Sutton | Improvements in or relating to the impregnation of metallic objects with a filling or sealing composition |
| US2303399A (en) * | 1939-05-01 | 1942-12-01 | Hall Lab Inc | Alkaline detergent |
| US2433723A (en) * | 1943-12-30 | 1947-12-30 | Theophil J Wieczorek | Solution for smoothing zinc surfaces |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2631951A (en) * | 1950-11-30 | 1953-03-17 | Poor & Co | Corrosion protected zinc products and method of producing them |
| US2665232A (en) * | 1950-12-18 | 1954-01-05 | United States Steel Corp | Method and solution for treating zinc surfaces to inhibit formation of white rust |
| DE1084103B (de) * | 1953-03-13 | 1960-06-23 | Armco Int Corp | Verfahren zur Erzeugung korrosionsbestaendiger ungefaerbter und metallglaenzender Zink- oder Aluminiumoberflaechen |
| US2796372A (en) * | 1953-05-07 | 1957-06-18 | Poor & Co | Corrosion protecting metal finishing composition |
| US2793967A (en) * | 1953-06-02 | 1957-05-28 | Poor & Co | Sealing composition and method |
| US2681873A (en) * | 1954-02-25 | 1954-06-22 | George L Deniston | Production of black oxide films on aluminum |
| US2887418A (en) * | 1956-12-24 | 1959-05-19 | Dow Chemical Co | Composition for and method of chrome pickling of magnesium shapes |
| FR2382515A1 (en(2012)) * | 1978-02-14 | 1978-09-29 | Int Lead Zinc Res | |
| US4328046A (en) * | 1980-10-14 | 1982-05-04 | Western Electric Co., Inc. | Chromate conversion coatings |
| US4367099A (en) * | 1981-06-15 | 1983-01-04 | Occidental Chemical Corporation | Trivalent chromium passivate process |
| US5178690A (en) * | 1991-05-13 | 1993-01-12 | Enthone-Omi Inc. | Process for sealing chromate conversion coatings on electrodeposited zinc |
Also Published As
| Publication number | Publication date |
|---|---|
| BE490295A (en(2012)) |
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