BG110102A - Method of anodizing aluminum and its alloys - Google Patents
Method of anodizing aluminum and its alloys Download PDFInfo
- Publication number
- BG110102A BG110102A BG10110102A BG11010208A BG110102A BG 110102 A BG110102 A BG 110102A BG 10110102 A BG10110102 A BG 10110102A BG 11010208 A BG11010208 A BG 11010208A BG 110102 A BG110102 A BG 110102A
- Authority
- BG
- Bulgaria
- Prior art keywords
- alloys
- alternating current
- oxalic acid
- aqueous solution
- aluminum
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 title claims description 10
- 239000000956 alloy Substances 0.000 title claims description 10
- 238000007743 anodising Methods 0.000 title claims description 10
- 229910052782 aluminium Inorganic materials 0.000 title claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 9
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000007864 aqueous solution Substances 0.000 claims abstract description 8
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 238000011089 mechanical engineering Methods 0.000 abstract 1
- 239000012224 working solution Substances 0.000 abstract 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- GANDVAJEIJXBQJ-UHFFFAOYSA-M potassium;hydron;2-hydroxy-2-oxoacetate Chemical compound [K+].OC(=O)C(O)=O.OC(=O)C([O-])=O GANDVAJEIJXBQJ-UHFFFAOYSA-M 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NIPHUXAREYFGPV-UHFFFAOYSA-N 2,2,3-triethylpentanoic acid Chemical compound CCC(CC)C(CC)(CC)C(O)=O NIPHUXAREYFGPV-UHFFFAOYSA-N 0.000 description 1
- 102100024066 Coiled-coil and C2 domain-containing protein 1A Human genes 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 101000910423 Homo sapiens Coiled-coil and C2 domain-containing protein 1A Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000010407 anodic oxide Substances 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 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 1
- 238000007654 immersion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Chemical Treatment Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Description
МЕТОД ЗА АНОДИРАНЕ НА АЛУМИНИЙ И НЕГОВИТЕ СПЛАВИMETHOD FOR ANODIZING ALUMINUM AND ITS ALLOYS
ОБЛАСТ НА ТЕХНИКАТАFIELD OF ENGINEERING
Изобретението се отнася до метод за анодиране на алуминий и неговите сплави приложимо в леката промишленост, машиностроенето, уредостроенето и битовата техника.The invention relates to a method for anodizing aluminum and its alloys applicable in light industry, machine building, appliance construction and household appliances.
ПРЕДШЕСТВУВАЩО СЪСТОЯНИЕ НА ТЕХНИКАТАPRIOR ART
Известен е метод за повишаване на корозионната устойчивост на порьозни анодни окисни филми върху алуминий и сплавите му състоящ се в това, че след анодиране порите на филма се пропиват чрез потапяне на детайлите в тетраетилопропионат, загряват се до температура от 120° до 150 , след което се оставят да изстинат в течността, изваждат се и се изваряват във вода в продължение от 5 до 30 минути.A known method for increasing the corrosion resistance of porous anodic oxide films on aluminum and its alloys consists in the fact that, after anodizing, the pores of the film are filled by immersing the parts in tetraethylpropionate, heated to a temperature of 120° to 150°, then allow to cool in the liquid, remove and boil in water for 5 to 30 minutes.
Характерно за известния метод е, че алуминият и неговите сплави се покриват със защитен окисен филм чрез анодиране в различни електролити на сярна, оксалова, фосфорна или хромова киселина. В зависимост от състава на електролитите и режима на анодиране се получават различни по дебелина и корозионна устойчивост порьозни анодни филми. Всички тези филми обаче имат еднакъв морфологичен строеж . Те са съставени от клетки с хексагонална симетрия, в центъра на всяка от които има пора. Порите започват от външната повърхност на окисния филм, но не достигат до метала, като по този начин се осъществява т.нар.’’бариерен подслой”. В зависимост от условията дебелината на бариерния подслой е от 20 до 10 нанометра, докато общата дебелина на филма е хиляди пъти по-голяма и може да достигне до 200 микронаIt is characteristic of the known method that aluminum and its alloys are covered with a protective oxide film by anodizing in various electrolytes of sulfuric, oxalic, phosphoric or chromic acid. Depending on the composition of the electrolytes and the anodizing mode, porous anodic films of different thickness and corrosion resistance are obtained. However, all these films have the same morphological structure. They are composed of cells with hexagonal symmetry, in the center of each of which there is a pore. The pores start from the outer surface of the oxide film, but do not reach the metal, thus creating a so-called "barrier sub-layer". Depending on the conditions, the thickness of the barrier sublayer is from 20 to 10 nanometers, while the total thickness of the film is thousands of times greater and can reach up to 200 microns
ТЕХНИЧЕСКА СЪЩНОСТTECHNICAL ESSENCE
Задачата на патента е да се създаде метод за анодиране на алуминий и неговите сплави, при който да се постигне висока корозоустойчивост, твърдост и износоустойчивост на алуминиевия оксид. Задачата е решена чрез метод, при който се подават променливотокови импулси към двата електрода поставени във воден разтвор на различни киселини. Методът се отличава от известните по това, че от променливотоковите импулси се филтрират всички висши хармоници 5,9,11.. .51,52, във ваната има от 5 до 15 % воден разтвор на калиев тетра оксалат и в продължение на 60 мин. се поддържа анодна плътност от 4 А /дм2.The task of the patent is to create a method for anodizing aluminum and its alloys, in which high corrosion resistance, hardness and wear resistance of aluminum oxide can be achieved. The task was solved by a method in which alternating current pulses are supplied to the two electrodes placed in an aqueous solution of different acids. The method differs from the known ones in that all higher harmonics 5,9,11.. .51,52 are filtered from the alternating current pulses, in the bath there is from 5 to 15% aqueous solution of potassium tetra oxalate and for 60 min. an anode density of 4 A /dm 2 is maintained.
Предимства на метода за анодиране на алуминий и неговите сплави е, че с формираните променливо-токови импулси, във воден разтвор на калиев тетра оксалат, в продължение на 60 мин., могат да се получат корозоустойчиви, твърди и дебели окисни слоеве /до 60 микрометра/, при температури от 10° до 25° С .Advantages of the method for anodizing aluminum and its alloys is that with the formed alternating current pulses, in an aqueous solution of potassium tetra oxalate, for 60 minutes, corrosion-resistant, hard and thick oxide layers / up to 60 micrometers can be obtained /, at temperatures from 10° to 25° C.
ПРИМЕРНИ ИЗПЪЛНЕНИЯ НА МЕТОДА ЗА АНОДИРАНЕ НА АЛУМИНИЙ И НЕГОВИТЕEXEMPLARY IMPLEMENTATIONS OF THE ALUMINUM ANODIZING METHOD AND ITS
СПЛАВИALLOYS
Пример 1: В 15% воден разтвор на калиев тетра оксалат е поставена алуминиева сплав от сериите: 1ххх,5ххх,6ххх,7ххх или от серия 2ххх сплави легирани с мед, при поддържане на ток от 4 А /дм2 и филтриране на висшите хармоници от 5,9,11,.. ..50,51,52, като в продължение на 60 мин. се получава анодно покритие с твърдост от 380 кг/мм2 до 850 кг /мм .Получените твърди покрития се отличават с отлична абразивна устойчивост и добра корозионна стабилност.Example 1: An aluminum alloy from the series: 1xxx, 5xxx, 6xxx, 7xxx or from series 2xxx alloys doped with copper is placed in a 15% aqueous solution of potassium tetra oxalate, while maintaining a current of 4 A / dm 2 and filtering the higher harmonics from 5,9,11,.. ..50,51,52, and during 60 minutes an anodic coating with a hardness of 380 kg/mm 2 to 850 kg/mm is obtained. The resulting hard coatings are distinguished by excellent abrasive resistance and good corrosion stability.
Пример 2: В 15 % воден разтвор на оксалова киселина е поставена алуминиева сплав на АД, АД1-АД9, АЛЗ-АЛ25, АМг1-6, АБ, АЛ16В, АЛ24, AKI 1, В93-96. Между електродите се поддържа токова плътностExample 2: An aluminum alloy of AD, AD1-AD9, AL3-AL25, AMg1-6, AB, AL16B, AL24, AKI 1, B93-96 was placed in a 15% aqueous solution of oxalic acid. A current density is maintained between the electrodes
А/дм и филтриране на висшите хармоници от 5,9,11,... .50,51,52, като в продължение на 60 мин. се получава анодно покритие с твърдост от 380 кг/мм2 до 850 кг /мм2.A/dm and filtering the higher harmonics of 5,9,11,... .50,51,52, and during 60 min. an anodic coating with a hardness of 380 kg/mm 2 to 850 kg/mm 2 is obtained .
Проведени са корозионни изпитания чрез метода на продължителното потапяне, съгласно DIN 50947 в продължение на шест дни в разтвор на: натриев хлорид, оцетна киселина, водороден прекис и дестилирана вода. След шестия ден не се наблюдава потъмняване или разрушаване на окисния слой, т.е образците издържат изпитанието.Corrosion tests were carried out by the method of prolonged immersion according to DIN 50947 for six days in a solution of: sodium chloride, acetic acid, hydrogen peroxide and distilled water. After the sixth day, no darkening or destruction of the oxide layer was observed, i.e. the samples passed the test.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BG10110102A BG110102A (en) | 2008-04-08 | 2008-04-08 | Method of anodizing aluminum and its alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BG10110102A BG110102A (en) | 2008-04-08 | 2008-04-08 | Method of anodizing aluminum and its alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BG110102A true BG110102A (en) | 2009-11-30 |
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|---|---|---|---|
| BG10110102A BG110102A (en) | 2008-04-08 | 2008-04-08 | Method of anodizing aluminum and its alloys |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3368706A4 (en) * | 2015-10-27 | 2019-05-01 | Métal Protection Lenoli Inc. | Electrolytic process and apparatus for the surface treatment of non-ferrous metals |
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2008
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3368706A4 (en) * | 2015-10-27 | 2019-05-01 | Métal Protection Lenoli Inc. | Electrolytic process and apparatus for the surface treatment of non-ferrous metals |
| US10941502B2 (en) | 2015-10-27 | 2021-03-09 | Metal Protection Lenoli Inc. | Electrolytic process and apparatus for the surface treatment of non-ferrous metals |
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