US3647649A - Method and composition for sealing anodized aluminum surfaces - Google Patents
Method and composition for sealing anodized aluminum surfaces Download PDFInfo
- Publication number
- US3647649A US3647649A US13832A US3647649DA US3647649A US 3647649 A US3647649 A US 3647649A US 13832 A US13832 A US 13832A US 3647649D A US3647649D A US 3647649DA US 3647649 A US3647649 A US 3647649A
- Authority
- US
- United States
- Prior art keywords
- composition
- sealing
- weight
- aluminum surfaces
- solution
- 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
- 239000000203 mixture Substances 0.000 title abstract description 26
- 238000007789 sealing Methods 0.000 title abstract description 25
- 238000000034 method Methods 0.000 title abstract description 19
- 229910052782 aluminium Inorganic materials 0.000 title abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title abstract description 17
- 229940078494 nickel acetate Drugs 0.000 abstract description 11
- MQRWBMAEBQOWAF-UHFFFAOYSA-N acetic acid;nickel Chemical compound [Ni].CC(O)=O.CC(O)=O MQRWBMAEBQOWAF-UHFFFAOYSA-N 0.000 abstract description 10
- 229940011182 cobalt acetate Drugs 0.000 abstract description 10
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 abstract description 10
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 abstract description 8
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 abstract description 8
- 239000001630 malic acid Substances 0.000 abstract description 8
- 235000011090 malic acid Nutrition 0.000 abstract description 8
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 abstract description 7
- 150000003863 ammonium salts Chemical class 0.000 abstract description 7
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 abstract description 7
- DUIOKRXOKLLURE-UHFFFAOYSA-N 2-octylphenol Chemical compound CCCCCCCCC1=CC=CC=C1O DUIOKRXOKLLURE-UHFFFAOYSA-N 0.000 abstract description 6
- 239000007859 condensation product Substances 0.000 abstract description 5
- 239000007864 aqueous solution Substances 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 5
- 238000009835 boiling Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- UYDLBVPAAFVANX-UHFFFAOYSA-N octylphenoxy polyethoxyethanol Chemical compound CC(C)(C)CC(C)(C)C1=CC=C(OCCOCCOCCOCCO)C=C1 UYDLBVPAAFVANX-UHFFFAOYSA-N 0.000 description 3
- 239000000080 wetting agent Substances 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- NFAOATPOYUWEHM-UHFFFAOYSA-N 2-(6-methylheptyl)phenol Chemical compound CC(C)CCCCCC1=CC=CC=C1O NFAOATPOYUWEHM-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- FWDSBAGKRBHRJH-UHFFFAOYSA-N azanium;naphthalene-1-sulfonate Chemical compound [NH4+].C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 FWDSBAGKRBHRJH-UHFFFAOYSA-N 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 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
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/24—Chemical after-treatment
- C25D11/246—Chemical after-treatment for sealing layers
Definitions
- compositions for sealing anodized aluminum surfaces contains 35-60% nickel acetate or cobalt acetate; 35-60% of the ammonium salt of naphthalene sulfonic acid, and minor quantities of a condensation product of octyl phenol with ethylene oxide and malic acid.
- the composition is applied in hot aqueous solution to the aluminum surfaces to be sealed.
- This invention relates to a method and composition for sealing anodized surfaces of aluminum and aluminumbase alloys. More particularly, it relates to a method and composition for sealing such surfaces to obtain a harder, more abrasive-resistant surface of greater resistivity while eliminating or minimizing smut formation.
- a sealing bath in common use comprises a solution of a hydrolyzable metallic salt, typically nickel acetate or cobalt acetate. Sealing with such a bath sets the dye, minimizes color bleeding and improves the permanence of the color.
- Nickel or cobalt acetate treatment however, has the disadvantage that it produces a cloudy or filmy coating on the surface of the sealed material.
- This coating referred to in the trade as smut, is particularly serious with dark shades and necessitates an additional step in the processing procedure to remove the filmy layer by mechanically butting or polishing the aluminum surface.
- the necessity for smut removal represents an added cost in the processing of aluminum articles, since each piece must be handled individually.
- the sealing bath of the invention can be prepared with ordinary tap water and has a much improved service life compared with baths heretofore used.
- the method of the invention is a variant of the hydrolyzable metal salt sealing technique, in that it employs as a sealing bath a solution of nickel acetate or cobalt acetate.
- the superior performance of the sealing bath of the invention is due to a novel combination of additives, namely, the ammonium salt of naphthalene sulfonic acid, two specific wetting agents, and malic acid.
- the sealing bath of the invention is prepared by dissolving in water a solid mixture having the following composition:
- Nickel acetate, cobalt acetate, or mixtures thereof 35-60 4250 Ammonium salt of naphthalene sulionlc acid (d 1spersant)' 35-60 42-50 Sodium lauryl sulfate (wetting agent) 0. 03-0. 3 0. 05-0. 15 Octyl phenoxy polyethoxy ethanol (wetting agent) 0. 1-1. 0 0. 2-0. 5 Make acid (bufier) 0. 5-4. 0 1. 0-2. 0
- octyl phenoxy polyethoxy ethanol referred to above, and which is contemplated for use in the invention, is the product produced by the condensation of one mole of isoor n-octyl phenol with about 12-13 moles of ethylene oxide.
- a particularly preferred embodiment of the sealing composition of the invention contains, on a water-free basis, about 49% of nickel acetate, cobalt acetate or mixtures thereof; about 49% of the ammonium salt naphthalene sulfonic acid; about 0.1% of sodium lauryl sulfate; about 0.25% of octyl phenoxy polyethoxy ethanol; and about 1.5% of malic acid.
- the sealing composition of the invention is used by dissolving it in water at a concentration of about 2-16 grams per liter, preferably about 2.5-10 grams per liter, and optimally about 5-8 grams per liter.
- The. sealing solution is heated to a temperature of about F. to the boiling point of the solution and preferably about 185- 205 F.
- the pH of the solution is adjusted as necessary with a suitable acid or base, such as acetic acid, ammonium hydroxide or sodium hydroxide, to achieve a value within the range of about 5.2-5.8 and preferably about 5.4-5.6.
- Contact of the sealing solution with the surfaces to be treated is maintained in the conventional manner for about 3-20 minutes and preferably about 5-10 minutes.
- the manipulative aspects of the sealing operation are not critical and any of the methods which have been used in the past may be employed with the novel baths of the invention.
- a sealing bath is prepared by dissolving in city (tap) water about 4.4 grams per liter of a composition consisting of 49 parts by weight of nickel acetate, 49 parts by weight of the ammonium salt of naphthalene sulfonic acid, 0.25 part by weight of the condensation product of one mole of isooctyl phenol with about 12-13 moles of ethylene oxide, 0.08 part by weight of sodium lauryl sulfate, and 1.5 parts by weight of malic acid.
- the pH of the resulting solution is adjusted with acetic acid to a value of 5.4.
- This solution maintained at a temperature of about 192 F., is used to seal an Anoclad 11 sheet having a 215 R1 anodic finish for about 10 minutes.
- the sealed sheet is essentially smut free.
- the sheets sealed in accordance with the invention show greater resistance to acid dissolution and equivalent surface resistivity.
- EXAMPLE II A sealing bath is prepared using the same ingredients and concentrations as those of Example I, except that deionized water is used in place of city water. The use of deionized water results in sealed samples having slightly lower acid dissolution rate and slightly higher resistance values than samples sealed with the solution of Example I. The aluminum surfaces sealed with the solution are again essentially smut free.
- a water-soluble composition for sealing anodized aluminum comprising about 35-60% by weight of nickel acetate, cobalt acetate or mixtures thereof; about 35-60% by weight of the ammonium; salt 16f naphthalene sulfonic acid; about 0.03-0.'3% byweight ofsodium laury-l-sulfate; about 01-10% by weight'of the condensation'productof one mole of octyl phenol with about 12-13 moles of ethylene oxide; and about 0.5-4.0% by weight of malic acid.
- a composition in accordance with claim 1 which contains about 42-50% by weight of nickel acetate, cobalt acetate, or mixtures thereof; about 4250% by weight of the ammonium salt of naphthalene sulfonic acid; about 0.05-0.15% by weight of sodium lauryl sulfate; about 02-05% by weight of the condensation product of one mole of octyl phenol with about 12-13 moles of ethylene oxide; and about 1.0-2.0% by weight of malic acid.
- a composition in accordance with claim 1 which contains about 49% by weight of nickel acetate, cobalt acetate, or mixtures thereof; about 49% of the ammonium salt of naphthalene sulfonic acid; about 0.1% by weight of sodium lauryl sulfate; about 0.25% by weight of the condensation product of one mole of octyl phenol with about 12-13 moles of ethylene oxide; and about 1.5% by weight of malic acid.
- A. bath for sealing anodized aluminum comprising an aqueous solution containing about 2-16 grams per liter of a composition of claim 1.
- a bath in accordance with claim 4 containing about 5-8 grams per liter of a composition of claim 1.
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating And Plating Baths Therefor (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Sealing Material Composition (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US1383270A | 1970-02-24 | 1970-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3647649A true US3647649A (en) | 1972-03-07 |
Family
ID=21761993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13832A Expired - Lifetime US3647649A (en) | 1970-02-24 | 1970-02-24 | Method and composition for sealing anodized aluminum surfaces |
Country Status (12)
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4521463A (en) * | 1982-08-18 | 1985-06-04 | Aluminum Company Of America | One step sealing process |
| US4588448A (en) * | 1981-08-28 | 1986-05-13 | Sandoz Ltd. | Process for sealing anodically oxidized aluminium or aluminium alloy surfaces |
| US20100129560A1 (en) * | 2008-11-27 | 2010-05-27 | Ping Lu | Sealing reagent for aluminum alloy |
| US8512872B2 (en) | 2010-05-19 | 2013-08-20 | Dupalectpa-CHN, LLC | Sealed anodic coatings |
| US8609254B2 (en) | 2010-05-19 | 2013-12-17 | Sanford Process Corporation | Microcrystalline anodic coatings and related methods therefor |
| US20150255253A1 (en) * | 2012-10-17 | 2015-09-10 | Constellium France | Vacuum chamber elements made of aluminum alloy |
| CN112210809A (zh) * | 2020-09-29 | 2021-01-12 | 九牧厨卫股份有限公司 | 一种银色氧化膜的制备方法 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE792852A (fr) * | 1971-12-17 | 1973-06-15 | Henkel & Cie Gmbh | Procede de traitement de surfaces d'aluminium par oxydation suivie d'une densification |
| US4784732A (en) * | 1986-07-24 | 1988-11-15 | Covino Charles P | Electrolytic formation of an aluminum oxide layer |
-
1970
- 1970-02-24 US US13832A patent/US3647649A/en not_active Expired - Lifetime
-
1971
- 1971-02-23 NL NL7102406A patent/NL7102406A/xx unknown
- 1971-02-23 SE SE7102322A patent/SE382471B/xx unknown
- 1971-02-23 LU LU62641D patent/LU62641A1/xx unknown
- 1971-02-24 FR FR7106212A patent/FR2078992A5/fr not_active Expired
- 1971-02-24 DE DE19712108725 patent/DE2108725A1/de active Pending
- 1971-02-24 ES ES388577A patent/ES388577A1/es not_active Expired
- 1971-02-24 CA CA106,190,A patent/CA950604A/en not_active Expired
- 1971-02-24 CH CH268471A patent/CH570467A5/xx not_active IP Right Cessation
- 1971-02-24 BE BE763413A patent/BE763413A/xx unknown
- 1971-04-19 GB GB2242471A patent/GB1310644A/en not_active Expired
- 1971-10-13 OA OA54394A patent/OA03814A/xx unknown
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4588448A (en) * | 1981-08-28 | 1986-05-13 | Sandoz Ltd. | Process for sealing anodically oxidized aluminium or aluminium alloy surfaces |
| US4521463A (en) * | 1982-08-18 | 1985-06-04 | Aluminum Company Of America | One step sealing process |
| US20100129560A1 (en) * | 2008-11-27 | 2010-05-27 | Ping Lu | Sealing reagent for aluminum alloy |
| US8449667B2 (en) * | 2008-11-27 | 2013-05-28 | Byd Co. Ltd. | Sealing reagent for aluminum alloy |
| US8512872B2 (en) | 2010-05-19 | 2013-08-20 | Dupalectpa-CHN, LLC | Sealed anodic coatings |
| US8609254B2 (en) | 2010-05-19 | 2013-12-17 | Sanford Process Corporation | Microcrystalline anodic coatings and related methods therefor |
| US20150255253A1 (en) * | 2012-10-17 | 2015-09-10 | Constellium France | Vacuum chamber elements made of aluminum alloy |
| CN112210809A (zh) * | 2020-09-29 | 2021-01-12 | 九牧厨卫股份有限公司 | 一种银色氧化膜的制备方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| NL7102406A (enrdf_load_stackoverflow) | 1971-08-26 |
| OA03814A (fr) | 1971-12-24 |
| FR2078992A5 (enrdf_load_stackoverflow) | 1971-11-05 |
| ES388577A1 (es) | 1973-05-16 |
| BE763413A (fr) | 1971-07-16 |
| CA950604A (en) | 1974-07-09 |
| LU62641A1 (enrdf_load_stackoverflow) | 1971-08-17 |
| GB1310644A (en) | 1973-03-21 |
| DE2108725A1 (de) | 1971-09-09 |
| SE382471B (sv) | 1976-02-02 |
| CH570467A5 (enrdf_load_stackoverflow) | 1975-12-15 |
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