US2698262A - Method of sealing anodized aluminum surfaces and article produced thereby - Google Patents
Method of sealing anodized aluminum surfaces and article produced thereby Download PDFInfo
- Publication number
- US2698262A US2698262A US21380951A US2698262A US 2698262 A US2698262 A US 2698262A US 21380951 A US21380951 A US 21380951A US 2698262 A US2698262 A US 2698262A
- Authority
- US
- United States
- Prior art keywords
- aluminum
- coating
- oxide
- sealing
- percent
- 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
- 229910052782 aluminium Inorganic materials 0.000 title claims description 26
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 26
- 238000000034 method Methods 0.000 title claims description 15
- 238000007789 sealing Methods 0.000 title claims description 15
- 238000000576 coating method Methods 0.000 claims description 27
- 239000011248 coating agent Substances 0.000 claims description 25
- 238000001035 drying Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 claims description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical class C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 2
- 230000008030 elimination Effects 0.000 claims description 2
- 238000003379 elimination reaction Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 9
- GGMPTLAAIUQMIE-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobiphenyl Chemical group ClC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1C1=CC=CC=C1 GGMPTLAAIUQMIE-UHFFFAOYSA-N 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 238000007654 immersion Methods 0.000 description 5
- 239000012188 paraffin wax Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 125000006267 biphenyl group Chemical group 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 238000007792 addition Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 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 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 229920006389 polyphenyl polymer Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- -1 sodium dichronate Chemical class 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 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
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- MHCAFGMQMCSRGH-UHFFFAOYSA-N aluminum;hydrate Chemical compound O.[Al] MHCAFGMQMCSRGH-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical class OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Chemical class 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- XENVCRGQTABGKY-ZHACJKMWSA-N chlorohydrin Chemical compound CC#CC#CC#CC#C\C=C\C(Cl)CO XENVCRGQTABGKY-ZHACJKMWSA-N 0.000 description 1
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical class [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000010960 commercial process Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910001512 metal fluoride Inorganic materials 0.000 description 1
- 150000004682 monohydrates Chemical class 0.000 description 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 150000001911 terphenyls Chemical class 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 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
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31801—Of wax or waxy material
Definitions
- This invention relates to the treatment of oxide layers formed on aluminum, magnesium, and aluminum or magnesium base alloys which will hereinafter be grouped and referred to by the term aluminum. It relates more specifically to the method for sealing oxide coatings formed on aluminum surfaces to improve the characteristics thereof.
- an oxide layer is formed as a protective layer on the aluminum by making the aluminum the anode in an electrolytic cell having an electrolyte formed of about 2 to 70 percent by weight sulphuric acid or other acids or acid salts of the type chromic acid, oxalic acid, sulfamic acid and the like. Any suitable metal, such as lead, may form the cathode. A voltage of about to 20 volts is impressed upon the cell while the electrolyte is held at about 40 C. until an oxide coating of the desired thickness is formed.
- the aluminum in another method, may be immersed in a solution, generally alkaline in nature, and the oxide film is formed thereon by chemical reaction.
- a solution generally alkaline in nature
- the oxide layer formed under these conditions consists generally of anhydrous alumina (A1203).
- the layer of aluminum oxide is considered to be relatively hard, porous, highly absorbent and of substantial thickness, depending upon the nature of the metal or alloy, the composition and character of the electrolyte, and the intensity of the electrical current.
- the oxide coating may contain other modifying components depending upon the process used and the base metal upon which the oxide layer is formed.
- the introduction of oxide coatings on the surfaces of aluminum is intended to improve resistance to corrosion, resistance to abrasion, and absorption of coloring when treated with suitable tinctorial agents, such as organic 1 dyes and inorganic pigments to provide permanent color in the surfaces of the aluminum.
- the characteristics of the oxide film can be markedly improved by a process, hereinafter referred to as scaling for rendering the film impervious and less porous.
- Sealing has been carried out commercially by immersing the anodized aluminum in water maintained between 80 C. and its boiling point. Sealing is believed to consist primarily in the conversion of the substantially porous and pervious oxide film of anhydrous alumina to a hydrated product, such as aluminum monohydrate AlzOsHzO with consequent swelling or volume increase of the oxide particles partially to close or seal the pores.
- Sealing by the processes heretofore employed is superficial in nature. Measurements have shown that an oxide layer of 15 microns may be converted into the monohydrate to a depth of only 3 to 5 microns by the treatment with hot water depending upon the length of the sealing operation.
- the sealing bath has been modified by additions of chromic acid, or boric acid, or metal salts such as sodium dichronate, zinc dichronate, ammonium dichronate, alone or in combination with organic acids, metal fluorides, metal borates and the like, or by the addition of nickel or cobalt sulfates and the like.
- the modified processes ofier some improvement but optimum conversion is not achieved and the sealed surface is ineffective for resistance against attack by strongly acidic or alkaline medium.
- Dilution of the halogenated phenyl or polyphenyl compounds may be efiected in suitable organic solvents capable of fostering rapid and complete wetting out of the aluminum oxide surface layer so that full penetration may be achieved. It is preferred to make use of a solvent or solvent system which is non-inflammable, non-toxic, and has a slow evaporation rate, and for such purpose use may be made of the halogenated solvents such as perchloroethylene, trichloroethylene, dichloroethylene, ethylene, chlorohydrin, trichlorobenzine and the like.
- the solvent system may be further improved by the addition of small amounts of chlorinated paraffin such as in amounts ranging from 0.2 to 2.0 percent by Weight.
- the sealed aluminum oxide surfaces may be dried at room conditions but it is preferred to accelerate drying by exposure to elevate temperatures, such for example as drying in an air oven for 10 to 30 minutes at to C. depending upon the mass.
- Example 1 A piece of anodically anodized aluminum is immersed for a few minutes in a bath formed of 1 to 5 percent by weight pentachlorodiphenyl dissolved in perchloroethylene maintained at room temperature. After immersion, the piece is dried by heating for about 30 minutes at a temperature of 100 to 120 C.
- Example 2 A piece of aluminum having an anodized surface is immersed at room temperature into a bath formed of 2 percent by Weight hexochloroterphenyl and 0.5 percent by Weight chlorinated paraffin dissolved in trichloroethylene. After immersion for about 10 to 20 minutes, the piece is removed, rinsed, and then dried at elevated temperature of about 100 C.
- Example 3 A piece of aluminum having an oxide layer formed thereon is immersed in a bath formed of 2 to 3 percent by weight pentachlorodiphenyl and 1.0 percent chlorinated paraffin dissolved in perchloroethylene. The bath is maintained at room temperature or slightly above. After immersion for about 10 minutes, the piece is allowed to dry.
- Plasticizers and Resins a publication of Monsanto Chemical Co., St. Louis,U. S. A., May 1940, pages 32-40.
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)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Description
United States Patent METHOD OF SEALING ANODIZED ALUMINUM SURFACES AND ARTICLE PRODUCED THEREBY I Frdric Balmas, Versailles France No Drawing. Application March 3, 1951, Serial No. 213,809
7 Claims. (Cl. 117-135 This invention relates to the treatment of oxide layers formed on aluminum, magnesium, and aluminum or magnesium base alloys which will hereinafter be grouped and referred to by the term aluminum. It relates more specifically to the method for sealing oxide coatings formed on aluminum surfaces to improve the characteristics thereof.
For many purposes, an oxide layer is formed as a protective layer on the aluminum by making the aluminum the anode in an electrolytic cell having an electrolyte formed of about 2 to 70 percent by weight sulphuric acid or other acids or acid salts of the type chromic acid, oxalic acid, sulfamic acid and the like. Any suitable metal, such as lead, may form the cathode. A voltage of about to 20 volts is impressed upon the cell while the electrolyte is held at about 40 C. until an oxide coating of the desired thickness is formed.
in another method, the aluminum may be immersed in a solution, generally alkaline in nature, and the oxide film is formed thereon by chemical reaction. There are a number of other less commercial processes for producing oxide layers on aluminum.
The oxide layer formed under these conditions consists generally of anhydrous alumina (A1203). Especially when formed by anodic oxidation, the layer of aluminum oxide is considered to be relatively hard, porous, highly absorbent and of substantial thickness, depending upon the nature of the metal or alloy, the composition and character of the electrolyte, and the intensity of the electrical current. The oxide coating may contain other modifying components depending upon the process used and the base metal upon which the oxide layer is formed. The introduction of oxide coatings on the surfaces of aluminum is intended to improve resistance to corrosion, resistance to abrasion, and absorption of coloring when treated with suitable tinctorial agents, such as organic 1 dyes and inorganic pigments to provide permanent color in the surfaces of the aluminum.
It has been found that the characteristics of the oxide film can be markedly improved by a process, hereinafter referred to as scaling for rendering the film impervious and less porous. Sealing has been carried out commercially by immersing the anodized aluminum in water maintained between 80 C. and its boiling point. Sealing is believed to consist primarily in the conversion of the substantially porous and pervious oxide film of anhydrous alumina to a hydrated product, such as aluminum monohydrate AlzOsHzO with consequent swelling or volume increase of the oxide particles partially to close or seal the pores.
Sealing by the processes heretofore employed is superficial in nature. Measurements have shown that an oxide layer of 15 microns may be converted into the monohydrate to a depth of only 3 to 5 microns by the treatment with hot water depending upon the length of the sealing operation. Further to improve corrosion resistance, the sealing bath has been modified by additions of chromic acid, or boric acid, or metal salts such as sodium dichronate, zinc dichronate, ammonium dichronate, alone or in combination with organic acids, metal fluorides, metal borates and the like, or by the addition of nickel or cobalt sulfates and the like. The modified processes ofier some improvement but optimum conversion is not achieved and the sealed surface is ineffective for resistance against attack by strongly acidic or alkaline medium.
It is an object of this invention to provide a method of the formed aluminum oxide layer with a dilute solution of a halogenated phenyl or polyphenyl compound. It is preferred to make use of pentachlorodiphenyl as the halogenated compound but other substances such as partially chlorinated'phetfyl, diphenyl, terphenyls and the like may be used.
It has been found sufficient if the compound is present in solution in amounts ranging from 1 to 10 percent by Weight. It is preferred to carry out the treatment at room temperature, but it will be understood that elevated temperatures may be used depending upon the solvent system.
Dilution of the halogenated phenyl or polyphenyl compounds may be efiected in suitable organic solvents capable of fostering rapid and complete wetting out of the aluminum oxide surface layer so that full penetration may be achieved. It is preferred to make use of a solvent or solvent system which is non-inflammable, non-toxic, and has a slow evaporation rate, and for such purpose use may be made of the halogenated solvents such as perchloroethylene, trichloroethylene, dichloroethylene, ethylene, chlorohydrin, trichlorobenzine and the like. The solvent system may be further improved by the addition of small amounts of chlorinated paraffin such as in amounts ranging from 0.2 to 2.0 percent by Weight.
It has been found sufiicient to immerse the aluminum having the oxide surface thereon for 5 to 30 minutes in the bath, but it will be understood that substantial sealing can be effected in less time and that no harmful results will be secured if immersion exceeds 30 minutes. After immersion, the sealed aluminum oxide surfaces may be dried at room conditions but it is preferred to accelerate drying by exposure to elevate temperatures, such for example as drying in an air oven for 10 to 30 minutes at to C. depending upon the mass.
The following are specific examples given by way of illustration but not by way of limitation of the practice of this invention.
Example 1 A piece of anodically anodized aluminum is immersed for a few minutes in a bath formed of 1 to 5 percent by weight pentachlorodiphenyl dissolved in perchloroethylene maintained at room temperature. After immersion, the piece is dried by heating for about 30 minutes at a temperature of 100 to 120 C.
Example 2 A piece of aluminum having an anodized surface is immersed at room temperature into a bath formed of 2 percent by Weight hexochloroterphenyl and 0.5 percent by Weight chlorinated paraffin dissolved in trichloroethylene. After immersion for about 10 to 20 minutes, the piece is removed, rinsed, and then dried at elevated temperature of about 100 C.
Example 3 A piece of aluminum having an oxide layer formed thereon is immersed in a bath formed of 2 to 3 percent by weight pentachlorodiphenyl and 1.0 percent chlorinated paraffin dissolved in perchloroethylene. The bath is maintained at room temperature or slightly above. After immersion for about 10 minutes, the piece is allowed to dry.
It Will be understood that changes may be made in the details of composition, treatment and drying without departing from the spirit of the invention, especially as defined in the following claims.
I claim:
1. In the method of sealing an anodized oxide coating formed on aluminum, the step of coating the oxide coating with a dilute solution consisting essentially of chlorinated diphenyl as the substance which remains upon elimination of the diluent, and then drying the treated coating at elevated temperature up to about 120 C.
2. In the method of sealing an anodized oxide coating formed on aluminum, the step of coating the oxide coating with a solution the solids of which consist essentially of 1 to 10 percent of pentachlorodiphenyl.
' 3. In the method of sealing an anodized oxide coating on aluminum, the step of coating the oxide coating with a solution the solids of which consist essentially of 1 to 10 percent by weight of chlorinated diphenyl and 0.2 to 2.0 percent by weight of chlorinated parafiin.
4. In the method of sealing an anodized oxide coating on aluminum, the steps of coating the oxide coating with a solution the solids of which consist essentially of 1 to 10 percent by weight of chlorinated diphenyl and 0.2 to 2.0 percent by weight of chlorinated parafiin, and drying the treated coating at a temperature of about 100 C.-120 C.
-5. In the method of sealing an anodized oxide coating on aluminum, the steps of coating the oxide coating in a bath the solids of which consist essentially of 1 to 10 percent by weight pentachlorodiphenyl and 0.2 to 2.0 percent by weight chlorinated paraffin, maintaining the bath at a temperature corresponding to room conditions, and then drying the coating at elevated temperatures.
6. Aluminum having an anodized surface coated with a,
material consisting essentially of pentachlorodiphenyl thereon as a sealer.
7. Aluminum having an anodized surface coated with a material consisting essentially of pentachlorodiphenyl and chlorinated paraffin thereon as a sealer.
References Cited in the file of this patent OTHER REFERENCES Edwards, Iunius D., Anodic Coating of Aluminum, June 1939, pages 12 and 13.
Plasticizers and Resins, a publication of Monsanto Chemical Co., St. Louis,U. S. A., May 1940, pages 32-40.
Claims (1)
1. IN THE METHOD OF SEALING AN ANODIZED OXIDE COATING FORMED ON ALUMINUM, THE STEP OF COATING THE OXIDE COATING WITH A DILUTE SOLUTION CONSISTING ESSENTAILLY OF CHLORINATED DIPHENYL AS THE SUBSTANCE WITH REMAINS UPON ELIMINATION OF THE DILUENT, AND THEN DRYING THE TREATED COATING AT ELEVATED TEMPERATURE UP TO ABOUT 120* C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US21380951 US2698262A (en) | 1951-03-03 | 1951-03-03 | Method of sealing anodized aluminum surfaces and article produced thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US21380951 US2698262A (en) | 1951-03-03 | 1951-03-03 | Method of sealing anodized aluminum surfaces and article produced thereby |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2698262A true US2698262A (en) | 1954-12-28 |
Family
ID=22796606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US21380951 Expired - Lifetime US2698262A (en) | 1951-03-03 | 1951-03-03 | Method of sealing anodized aluminum surfaces and article produced thereby |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2698262A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3012917A (en) * | 1957-03-26 | 1961-12-12 | Pechiney Prod Chimiques Sa | Method of protecting metal surfaces |
| US3303054A (en) * | 1963-01-30 | 1967-02-07 | Monsanto Res Corp | Dry cell having an electrolyte containing a poly-nitro-substituted aromatic polycarboylic acid |
| DE1301189B (en) * | 1965-08-03 | 1969-08-14 | Langbein Pfanhauser Werke Ag | Process for re-densifying oxide layers produced by anodic oxidation on aluminum and aluminum alloys by steam treatment |
| US4046587A (en) * | 1975-12-23 | 1977-09-06 | Guglielmo Richard J Sr | Primer composition, process for using same and product obtained thereby |
| WO1984003366A1 (en) * | 1983-02-22 | 1984-08-30 | Dennison Mfg Co | Anodized electrostatic imaging surface |
| US4518468A (en) * | 1983-02-22 | 1985-05-21 | Dennison Manufacturing Company | Process for making electrostatic imaging surface |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB488110A (en) * | 1936-12-31 | 1938-06-30 | Sydney Kerr Smith | New compositions of matter |
| US2294717A (en) * | 1940-01-24 | 1942-09-01 | Clifford R Carney | Method of treating anodized aluminum surfaces |
| US2403179A (en) * | 1942-11-20 | 1946-07-02 | Standard Oil Co | Chlorination of hydrocarbon mixtures |
| US2424621A (en) * | 1945-07-06 | 1947-07-29 | Jr Marvin R Mcclatchey | Shipping tags, labels, or the like and method of making the same |
| US2529188A (en) * | 1948-04-07 | 1950-11-07 | Gulf Research Development Co | Lubricating metal surfaces during cold-working |
-
1951
- 1951-03-03 US US21380951 patent/US2698262A/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB488110A (en) * | 1936-12-31 | 1938-06-30 | Sydney Kerr Smith | New compositions of matter |
| US2294717A (en) * | 1940-01-24 | 1942-09-01 | Clifford R Carney | Method of treating anodized aluminum surfaces |
| US2403179A (en) * | 1942-11-20 | 1946-07-02 | Standard Oil Co | Chlorination of hydrocarbon mixtures |
| US2424621A (en) * | 1945-07-06 | 1947-07-29 | Jr Marvin R Mcclatchey | Shipping tags, labels, or the like and method of making the same |
| US2529188A (en) * | 1948-04-07 | 1950-11-07 | Gulf Research Development Co | Lubricating metal surfaces during cold-working |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3012917A (en) * | 1957-03-26 | 1961-12-12 | Pechiney Prod Chimiques Sa | Method of protecting metal surfaces |
| US3303054A (en) * | 1963-01-30 | 1967-02-07 | Monsanto Res Corp | Dry cell having an electrolyte containing a poly-nitro-substituted aromatic polycarboylic acid |
| DE1301189B (en) * | 1965-08-03 | 1969-08-14 | Langbein Pfanhauser Werke Ag | Process for re-densifying oxide layers produced by anodic oxidation on aluminum and aluminum alloys by steam treatment |
| US4046587A (en) * | 1975-12-23 | 1977-09-06 | Guglielmo Richard J Sr | Primer composition, process for using same and product obtained thereby |
| US4129676A (en) * | 1975-12-23 | 1978-12-12 | Guglielmo Richard J Sr | Primer composition, process for using same and product obtained thereby |
| WO1984003366A1 (en) * | 1983-02-22 | 1984-08-30 | Dennison Mfg Co | Anodized electrostatic imaging surface |
| US4518468A (en) * | 1983-02-22 | 1985-05-21 | Dennison Manufacturing Company | Process for making electrostatic imaging surface |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4184926A (en) | Anti-corrosive coating on magnesium and its alloys | |
| US2260278A (en) | Process for the production of opaque protective coatings on aluminum and its alloys | |
| US3012917A (en) | Method of protecting metal surfaces | |
| US3961111A (en) | Method of increasing corrosion resistance of anodized aluminum | |
| US2578400A (en) | Method for providing oxide coating on aluminum and its alloys | |
| US2698262A (en) | Method of sealing anodized aluminum surfaces and article produced thereby | |
| US2880148A (en) | Method and bath for electrolytically coating magnesium | |
| RU2543580C1 (en) | Method of obtaining protective coatings on magnesium alloys | |
| US3440150A (en) | Dual-seal anodized aluminum | |
| US1946151A (en) | Protecting aluminum from corrosion | |
| KR101914394B1 (en) | Method for surface treatment of aluminium and surface treated aluminium | |
| US3849264A (en) | Production of stain resistant, clear, sealed anodized films | |
| US3790453A (en) | Corrosion protected anodized aluminum surfaces | |
| US3216866A (en) | Treatment of anodized aluminum | |
| US2346658A (en) | Corrosion resistant coating | |
| US3017285A (en) | Method of writing on anodized aluminum | |
| US2987417A (en) | Pigmenting aluminum oxide coating | |
| GB1069168A (en) | Composite coated aluminium articles | |
| US3351540A (en) | Method of improving the corrosion resistance of oxidized metal surfaces | |
| US1526127A (en) | Coating aluminum articles | |
| US2819192A (en) | Modification of aluminum surfaces | |
| GB2140033A (en) | Sealing aluminum and aluminum alloys following anodization | |
| US3787298A (en) | Anodizing aluminum foams | |
| JPH0741992A (en) | Surface treatment of aluminum or its alloy | |
| US1946150A (en) | Coating of aluminum |