US2926125A - Coating articles of magnesium or magnesium base alloys - Google Patents
Coating articles of magnesium or magnesium base alloys Download PDFInfo
- Publication number
- US2926125A US2926125A US617287A US61728756A US2926125A US 2926125 A US2926125 A US 2926125A US 617287 A US617287 A US 617287A US 61728756 A US61728756 A US 61728756A US 2926125 A US2926125 A US 2926125A
- Authority
- US
- United States
- Prior art keywords
- magnesium
- solution
- coating
- base alloys
- hydrogen peroxide
- 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
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims description 38
- 229910052749 magnesium Inorganic materials 0.000 title claims description 38
- 239000011777 magnesium Substances 0.000 title claims description 38
- 238000000576 coating method Methods 0.000 title claims description 32
- 239000011248 coating agent Substances 0.000 title claims description 23
- 239000000956 alloy Substances 0.000 title claims description 21
- 229910045601 alloy Inorganic materials 0.000 title claims description 21
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 32
- 239000002585 base Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 11
- 229910052783 alkali metal Inorganic materials 0.000 claims description 10
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical class [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-PWCQTSIFSA-N Tritiated water Chemical compound [3H]O[3H] XLYOFNOQVPJJNP-PWCQTSIFSA-N 0.000 claims 1
- 150000001340 alkali metals Chemical class 0.000 claims 1
- 239000000243 solution Substances 0.000 description 25
- 238000005260 corrosion Methods 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 11
- -1 alkali metal borate Chemical class 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 238000011282 treatment Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 239000004615 ingredient Substances 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229920001353 Dextrin Polymers 0.000 description 3
- 239000004375 Dextrin Substances 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 235000019425 dextrin Nutrition 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 150000002978 peroxides Chemical class 0.000 description 3
- 235000011121 sodium hydroxide Nutrition 0.000 description 3
- 239000002966 varnish Substances 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 241001416092 Buteo buteo Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-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
- 150000008043 acidic salts Chemical class 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- NVIFVTYDZMXWGX-UHFFFAOYSA-N sodium metaborate Chemical compound [Na+].[O-]B=O NVIFVTYDZMXWGX-UHFFFAOYSA-N 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-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
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/30—Anodisation of magnesium or alloys based thereon
Description
COATING ARTICLES F MAGNESIUM OR MAGNESIUM BASE ALLOYS Jack Ellwood Cuthbert Currah, Reddendale, Ontario, and Alfred Rudin and Max Morf, Beloeil, Quebec, Canada, assignors to Canadian Industries Limited, Montreal, Quebec, Canada, a corporation of Canada No Drawing. Application October 22, 1956 Serial No. 617,287
Claims priority, application Canada March 17, 1956 8 Claims. (Cl. 20456)' This invention relates to a method of producing coatings of a protective nature on the surface of articles of magnesium or magnesium base alloys. ticularly relates to an improved method of electrolytically coating the surfaces of articles of magnesium or magnesium base alloys and to the electrolytic bath used in said method.
Magnesium or magnesium base alloys exhibit good resistance to atmospheric corrosion, but are attacked relatively rapidly by most neutral and acidic salt solutions. The corrosion appears to be of the hydrogen-evolution type, i.e., hydrogen is liberated at cathodic areas and magnesium goes into solution from anodic areas. extent of corrosion depends on the corroding medium, the composition of the alloy and the time of exposure. Magnesium and magnesium base alloys are normally strongly anodic and have a pronounced tendency to dissolve when in electrical contact with other metals in an electrolyte. All commonly used metals will cause gal vanic corrosion of magnesium or magnesium base alloys in a conductive solution.
Most paints and varnishes do not'adhere well to untreated magnesium or magnesium base alloys because magnesium hydroxide, which is formed as a corrosion product, is strongly alkaline and causes peeling of the It more par- The paint film. Magnesium and magnesium base alloys are usually protected by painting after a chemical or electrochemical surface treatment.
Several good anodic treatments have been developed recently but none of these treatments has produced a corrosion-resistant coating which does not spall, crack or flake on bending.
It is an object of this invention to provide a method of producing a protective coating upon the surface of articles of magnesium or magnesium base alloys, which coating is an improvement over coatings heretofore available.
A particular object is to provide a method of producing a protective coating upon the surface of articles of magnesium or magnesium base alloys, which coating is uniform in thickness and appearance and resistant to corrosion, and which does not spall 0n bending or flexing of the article.
A further object is to provide an electrolytic bath for use in such a method.
Other objects of this invention and advantages thereof will appear hereinafter.
Broadly speaking, the aforesaid objects are accomplished by treating electrolytically articles of magnesium or magnesium base alloys in an aqueous solution comprising as essential ingredients an alkali metal borate and a member of the group consisting of hydrogen peroxide, soluble peroxygen compounds and compounds which yield hydrogen peroxide in solution.
It has been found that a protective thin layer of black or grey appearance can be obtained on articles of mag- 2,926,125 Patented Feb. 23, 1960 nesium or magnesium base alloys by treating them electrolytically in an aqueous solution comprising as essential ingredients an alkali metal borate and hydrogen peroxide or a compound which yields hydrogen peroxide in solution. The so-produced coating securely adheres to the surfaces to which it is applied, and is very resistant to corrosion.
In treating articles according to the invention, either direct current or alternating current may be used. The coatings produced by the treatment with direct current form more rapidly, efiect a more even coverage and exhibit a better appearance than those produced with the aid of alternating current. When alternating current is used, the article is, of course, anodic during a portion of the cycle. The cathode may consist of any suitable material such as magnesium, aluminum, stainless steel, copper, graphite, etc.
Before carrying out the coating process, the articles of magnesium or magnesium base alloys to be coated, are suitably cleaned in conventional manner according to the nature of the foreign matter to be removed. Thus, the removal of oil and grease, and of some of the usual chemical finishes, may be effected by immersing the articles in a hot alkaline stripping solution comprising, for example, caustic soda and diethylene glycol.
It is desirable to activate the surface of the article to be coated with acid as a preliminary step before coatsium base alloys which have not received any special treatment may be satisfactorily prepared for the electrolytic treatment of the invention, by conventional mechanical methods.
The electrolytic coating solution of the invention may be fortified with certain other ingredients thereby producing still better coatings. For example, the addition of ingredients such as alkali metal oxalates or dextrin reduces the tendency of the article to become pitted during the anodic treatment.
Borax, sodium metaborate or a mixture of boric acid and sodium hydroxide may be used alone, or in combination, as the source of borate ions. Good coatings are always formed when any one or a combination of these chemicals is present in solution in a concentration equivalent to 0.5 g./l. B 0 or greater. It is preferable to operate with a borate concentration considerably higher than the minimum values in order to obtain a good coating within a shorter application time.
At least a detectable trace of peroxide is required in the electrolyte for coating formation. When larger amounts of peroxide are used, there is a tendency for the anode to become pitted and for the coating to develop a black crust or not to be adherent. This crusting and pitting may be avoided by working at lower curirent density. While relatively concentrated peroxide solutions may be used it is preferable to use moderate concentrations for economical purposes since higher permissible current densities result in a shorter coating time. The maximum values of the current densities or voltages used are affected by solution composition and degree of agitation of the electrolyte.
The lowest pH at which a satisfactory coating can be formed is about 8.0, but the quality of the coating appears to improve with a higher pH. The upper pH limit is the pH at Which the solution precipitates.
Coatings can be formed at a temperature range extending from the freezing point of the solution to about 85 C., depending on the kind of articles to be coated. It is preferable, however, that the coating process takes place at a temperature range extending from 20 C. to 30 C.
The solution used for carrying out the coating treatment according to the invention may be prepared in various ways depending upon the choice of ingredients, and the pH may be adjusted to the desired limit by the addition to the solution, if necessary, of an alkali such as sodium hydroxide.
Conventional magnesium racks and clamps may be employed for carrying out the electrolytic process. It is essential that the racks or clamps make good contact with the articles to be coated, since the coating acts as an insulator. A brief dip in dilute nitric acid or fluoridecontaining solutions inhibits them from being coated and therefore keeps them clean. This feature is an advantage since no current need be lost in coating them.
The following table sets forth examples of preferred operating baths for the production of coatings according to the invention.
alloy article, which comprises immersing the article as the anode into a solution having a pH of at least 8 and consisting essentially of water, an alkali metal borate in a concentration of at least 0.05% by weight calculated as diboron trioxide, and a substance selected from the group consisting of hydrogen peroxide, soluble peroxygen compounds and compounds which yield hydrogen peroxide in a concentration of at least 0.001% by weight calculated as hydrogen peroxide, while passing an electric current through the solution.
2. A method of producing a corrosion-resistant coating on the surface of a. magnesium or a magnesium base alloy article, which comprises immersing the article as the anode into a solution having a pH of at least 8 and consisting essentially of water, an alkali metal borate in a concentration of at least 0.05% by weight calculated as diboron trioxide, a compound which yields hydrogen peroxide in solution in a concentration of at least 0.001% by weight calculated as hydrogen peroxide, and material selected from the group consisting of dextrin, alkali metal oxalates, and mixtures thereof, while passing an electric current through the solution.
3. An electrolytic bath solution having a pH of at Table l Electrolyte Anodic current deusity 10- 0 0 a i. Q E o 8 3 2 =1 Panel 3 it 2 E f: a g g r; 5 Remarks Nos. 0: 6,, 9. B 53*:1 'o 3 5 3 3 "1M mt. 11.. Om cs @A a. 00 a has a; a u h o 3 4: o Bag 3: era: a": me g; E! 5 g 5 5' 3 5 539, 1: :gg i c! '5 o "2 H we 52 a? E? 53 5 age s a a s5 Eb Q 9 en an 01-4 El) 0 G E '3 :2 m in 5: n-t Q hi E; 5 i=1 5 2. 5 1 7. 5 10. 5 0. 4 0. 6 28 5- 8 +1 g./l. M83003. 2. 5 l 7. 5 1.2 0.6 7 8 +1 g.l1. Nmoot. 6 16 2. 5 0. 8 17 7-10 2 18 8. 0 2. 0 1. 6 21 10 6 9. 8 1. 1 0. 4 5 10 20 9. 1. 3 0. 4 19 10 2 20 9. 5 2. 4 0. 4 11 10 +g.ll. Oxalic Acid. 4 0. 02 10. 2 2. 5 0. 3 7 10 2O 12. 1 2. 6 2. 5 5 6 33 4 20 9. 8 1. 5 1. 4 0. 9 4 0.75 10 0.6 0.6 4 7-15 34 4 0. 8 10. 6 2. 3 0. 5 10 5-22 2. 5 1 7. 5 1.3 0.7 7 8 g./l. N11 00:
(sodium carbonate). 14 14 2 0. 8 9. 8 l. 3 0. 4 2 12 Amp./cm.=amperes per square centimeter. Mins.=Minu es.
All panels in Table I were made of an alloy containing approximately 3% aluminum, 0.45% manganese, 1% zinc and 95.55% magnesium. Other magnesium base alloys of widely differing compositions and with different alloying elements have been coated satisfactorily by the described procedure.
The corrosion-resistant finish described above is dried by simply allowing it to stand in the air, or by air blasting or gentle heating and thereafter can be further improved by the application thereon of a suitable top-coat which will increase its abrasion resistance and its resistance to acids and salts.
Among the finishes that can be applied, the more suitable are selected from the group consisting of paints, varnishes and resins, and, more specifically, zinc chromate primers and commercial spar varnishes.
It is to be understood that the invention is not limited to the specific details before described but may be carried out in other ways without departure from its spirit.
What we claim is:
l. A method of producing a corrosion-resistant coating on the surface of a magnesium or a magnesium base G.ll.=grams per litre. Ml.ll.=millilitres per litre.
least 8 and consisting essentially of water, an alkali metal borate in a concentration of at least 0.05% by weight calculated as diboron trioxide, and a substance selected from the group consisting of hydrogen peroxide, soluble peroxygen compounds and compounds which yield hydrogen peroxide in solution in a concentration of at least 0.001% by weight calculated as hydrogen peroxide.
4. An electrolytic bath solution having a'pH of at least 8 and consisting essentially of water, an alkali metal borate in a concentration of at least 0.05 by weight calculated as diboron trioxide, a compound which yields hydrogen peroxide in solution in a concentration of at least 0.001% by weight calculated as hydrogen peroxide, and material selected from the group consisting of dextrin, alkali metal oxalates, and mixtures thereof.
5. A method as claimed in claim 1 wherein a temperature range extending from the freezing point of the solution to about C. is maintained during the entire coating time.
6. A method as claimed in claim 1 wherein a temperature range extending from 20 C. to 30 C. is maintained during the entire coating time.
I! o 6 7. A method as claimed in claim 2 wherein a tem- References Cited in the file of this patent perature range extending from the freezing point of the UNITED STATES PATENTS solution to about 85 C. 1s mamtalned during the en- 2,206,028 Buzzard July 2 1940 are coatlng time.
8. A method as claimed in claim 2 wherein a tem 5 2276353 Thompson 1942 perature range extending from 20 C. to 30 C. is main- FOREIGN PATENTS mined during the entire coating time. 815,155 France July 7, 1937
Claims (1)
1. A METHOD OF PRODUCING A CORROSION-RESISTANT COATING ON THE SURFACE OF A MAGNESIUM OR A MAGNESIUM BASE ALLOY ARTICLE, WHICH COMPRISES IMMERSING THE ARTICLE AS THE ANODE INTO A SOLUTION HAVING A PH OF AT LEAST 8 AND CONSISTING ESSENTIALLY OF WATER, AN ALKALI METAL BORATE IN A CONCENTRATION OF AT LEAST 0.05% BY WEIGHT CALCULATED AS DIBORON TRIOXIDE, AND A SUBSTANCES SELECTED FROM THE GROUP CONSISTING OF HYDROGEN PERODIXE, SOLUBLE PEROXYGEN COMPOUNDS AND COMPOUNDS WHICH YIELD HYDROGEN PEROXIDE IN A CONCENTRATION OF ALT LEAST 0.001% BY WEIGHT CALCULATED AS HYDROGEN PEROXIDE, WHILE PASSING AN ELECTRIC CURRENT THROUGH THE SOLUTION
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2926125X | 1956-03-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2926125A true US2926125A (en) | 1960-02-23 |
Family
ID=4176840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US617287A Expired - Lifetime US2926125A (en) | 1956-03-17 | 1956-10-22 | Coating articles of magnesium or magnesium base alloys |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2926125A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3049482A (en) * | 1960-12-29 | 1962-08-14 | Sylvania Electric Prod | Coating of small bore articles |
| US3213004A (en) * | 1961-03-08 | 1965-10-19 | American Potash & Chem Corp | Surface preparation of platinum group metals for electrodeposition |
| US3477921A (en) * | 1967-04-10 | 1969-11-11 | Terry Lee Sanford | Process for anodizing magnesium and magnesium alloys |
| US3956095A (en) * | 1974-04-30 | 1976-05-11 | Canadian Gas Association | Sacrificial anode |
| US5792335A (en) * | 1995-03-13 | 1998-08-11 | Magnesium Technology Limited | Anodization of magnesium and magnesium based alloys |
| US6797147B2 (en) | 2001-10-02 | 2004-09-28 | Henkel Kommanditgesellschaft Auf Aktien | Light metal anodization |
| US20050061680A1 (en) * | 2001-10-02 | 2005-03-24 | Dolan Shawn E. | Article of manufacture and process for anodically coating aluminum and/or titanium with ceramic oxides |
| US20050115839A1 (en) * | 2001-10-02 | 2005-06-02 | Dolan Shawn E. | Anodized coating over aluminum and aluminum alloy coated substrates and coated articles |
| US20050115840A1 (en) * | 2001-10-02 | 2005-06-02 | Dolan Shawn E. | Article of manufacture and process for anodically coating an aluminum substrate with ceramic oxides prior to polytetrafluoroethylene or silicone coating |
| US20060013986A1 (en) * | 2001-10-02 | 2006-01-19 | Dolan Shawn E | Article of manufacture and process for anodically coating an aluminum substrate with ceramic oxides prior to organic or inorganic coating |
| US20080202623A1 (en) * | 2007-02-22 | 2008-08-28 | Deangelis Alfred R | Electrocoated conductive fabric |
| US9701177B2 (en) | 2009-04-02 | 2017-07-11 | Henkel Ag & Co. Kgaa | Ceramic coated automotive heat exchanger components |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR815155A (en) * | 1937-06-26 | 1937-07-07 | Process for the chemical protection of metals such as magnesium and its alloys against corrosion | |
| US2206028A (en) * | 1936-11-27 | 1940-07-02 | Robert W Buzzard | Anodic treatment of magnesium |
| US2276353A (en) * | 1935-09-28 | 1942-03-17 | Parker Rust Proof Co | Process of coating |
-
1956
- 1956-10-22 US US617287A patent/US2926125A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2276353A (en) * | 1935-09-28 | 1942-03-17 | Parker Rust Proof Co | Process of coating |
| US2206028A (en) * | 1936-11-27 | 1940-07-02 | Robert W Buzzard | Anodic treatment of magnesium |
| FR815155A (en) * | 1937-06-26 | 1937-07-07 | Process for the chemical protection of metals such as magnesium and its alloys against corrosion |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3049482A (en) * | 1960-12-29 | 1962-08-14 | Sylvania Electric Prod | Coating of small bore articles |
| US3213004A (en) * | 1961-03-08 | 1965-10-19 | American Potash & Chem Corp | Surface preparation of platinum group metals for electrodeposition |
| US3477921A (en) * | 1967-04-10 | 1969-11-11 | Terry Lee Sanford | Process for anodizing magnesium and magnesium alloys |
| US3956095A (en) * | 1974-04-30 | 1976-05-11 | Canadian Gas Association | Sacrificial anode |
| US5792335A (en) * | 1995-03-13 | 1998-08-11 | Magnesium Technology Limited | Anodization of magnesium and magnesium based alloys |
| US6280598B1 (en) | 1995-03-13 | 2001-08-28 | Magnesium Technology Limited | Anodization of magnesium and magnesium based alloys |
| US6916414B2 (en) | 2001-10-02 | 2005-07-12 | Henkel Kommanditgesellschaft Auf Aktien | Light metal anodization |
| US7569132B2 (en) | 2001-10-02 | 2009-08-04 | Henkel Kgaa | Process for anodically coating an aluminum substrate with ceramic oxides prior to polytetrafluoroethylene or silicone coating |
| US20050115839A1 (en) * | 2001-10-02 | 2005-06-02 | Dolan Shawn E. | Anodized coating over aluminum and aluminum alloy coated substrates and coated articles |
| US20050115840A1 (en) * | 2001-10-02 | 2005-06-02 | Dolan Shawn E. | Article of manufacture and process for anodically coating an aluminum substrate with ceramic oxides prior to polytetrafluoroethylene or silicone coating |
| US6797147B2 (en) | 2001-10-02 | 2004-09-28 | Henkel Kommanditgesellschaft Auf Aktien | Light metal anodization |
| US20060013986A1 (en) * | 2001-10-02 | 2006-01-19 | Dolan Shawn E | Article of manufacture and process for anodically coating an aluminum substrate with ceramic oxides prior to organic or inorganic coating |
| US8663807B2 (en) | 2001-10-02 | 2014-03-04 | Henkel Ag & Co. Kgaa | Article of manufacture and process for anodically coating aluminum and/or titanium with ceramic oxides |
| US7452454B2 (en) | 2001-10-02 | 2008-11-18 | Henkel Kgaa | Anodized coating over aluminum and aluminum alloy coated substrates |
| US20090098373A1 (en) * | 2001-10-02 | 2009-04-16 | Henkelstrasse 67 | Anodized coating over aluminum and aluminum alloy coated substrates and coated articles |
| US20050061680A1 (en) * | 2001-10-02 | 2005-03-24 | Dolan Shawn E. | Article of manufacture and process for anodically coating aluminum and/or titanium with ceramic oxides |
| US7578921B2 (en) | 2001-10-02 | 2009-08-25 | Henkel Kgaa | Process for anodically coating aluminum and/or titanium with ceramic oxides |
| US20090258242A1 (en) * | 2001-10-02 | 2009-10-15 | Henkel Ag & Co. Kgaa | Article of manufacture and process for anodically coating an aluminum substrate with ceramic oxides prior to polytetrafluoroethylene or silicone coating |
| US20100000870A1 (en) * | 2001-10-02 | 2010-01-07 | Henkel Ag & Co. Kgaa | Article of manufacture and process for anodically coating aluminum and/or titanium with ceramic oxides |
| US7820300B2 (en) | 2001-10-02 | 2010-10-26 | Henkel Ag & Co. Kgaa | Article of manufacture and process for anodically coating an aluminum substrate with ceramic oxides prior to organic or inorganic coating |
| US8361630B2 (en) | 2001-10-02 | 2013-01-29 | Henkel Ag & Co. Kgaa | Article of manufacture and process for anodically coating an aluminum substrate with ceramic oxides prior to polytetrafluoroethylene or silicone coating |
| US20080202623A1 (en) * | 2007-02-22 | 2008-08-28 | Deangelis Alfred R | Electrocoated conductive fabric |
| US9701177B2 (en) | 2009-04-02 | 2017-07-11 | Henkel Ag & Co. Kgaa | Ceramic coated automotive heat exchanger components |
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