US20070267299A1 - Method for Forming Anodic Oxide Layer on Surface of Aluminum or Aluminum Alloy - Google Patents

Method for Forming Anodic Oxide Layer on Surface of Aluminum or Aluminum Alloy Download PDF

Info

Publication number
US20070267299A1
US20070267299A1 US10/542,533 US54253304A US2007267299A1 US 20070267299 A1 US20070267299 A1 US 20070267299A1 US 54253304 A US54253304 A US 54253304A US 2007267299 A1 US2007267299 A1 US 2007267299A1
Authority
US
United States
Prior art keywords
aluminum alloy
aluminum
oxide layer
layer
forming
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.)
Abandoned
Application number
US10/542,533
Other languages
English (en)
Inventor
Yoshiyuki Mitani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of US20070267299A1 publication Critical patent/US20070267299A1/en
Abandoned legal-status Critical Current

Links

Images

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
    • C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
    • 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

Definitions

  • the present invention relates to an improvement of a method for forming an anodic oxide layer on a surface of aluminum or an aluminum alloy.
  • a method for forming a corrosion-resistant oxide layer by anodizing aluminum or an alloy thereof in an electrolytic solution such as an aqueous solution of nitric acid, sulphuric acid or chromic acid for the purpose of mainly improving corrosion resistance thereof is known as an alumite treatment.
  • Articles subjected to the alumite treatment are widely utilized in various fields with a central focus on daily commodities such as a pan and a teakettle.
  • Patent Document 1 JP-B No. 01-019479;
  • Patent Document 2 JP-A No. 02-097698;
  • Patent Document 3 JP-B No. 05-014033.
  • the layer to be formed by a conventional method is restricted to have a comparably small thickness of about 30 to about 50 ⁇ m, a low hardness and the like and, accordingly, there is a given limitation upon applications thereof.
  • the present invention has been achieved in order to solve these problems and an object of the present invention is to provide a method for treating a surface of aluminum or an aluminum alloy which can treat various types of aluminum alloys involving not only aluminum itself, but also duralumin and a die cast alloy, can apply a thick layer of 300 to 500 ⁇ m and has a number of advantages such that the layer to be obtained has a high surface hardness, an excellent heat resistance, an antibiotic action and the like and can produce various types of aluminum materials which can be utilized in a far wide field compared with a conventional one.
  • the above-described object according to the present invention can be attained by performing an anodic oxidation treatment by using a bath liquid, which involves an aqueous solution containing 250 gr/l to 350 gr/l of sulfuric acid and 15 gr/l to 25 gr/l of nickel sulfate under the following conditions:
  • the above-described treatment according to the present invention is referred to as “the present treatment (1)” and a product to be obtained thereby is referred to as “present product (1)”.
  • the object according to the present invention can be performed more favorably by using a bath liquid in which the bath liquid to be used in the present treatment (1) is further added with a low polymerization acrylic resin composition in the range of from 280 gr/l to 320 gr/l.
  • the above-described treatment according to the present invention is referred to as “the present treatment (2)” and a product to be obtained thereby is referred to as “present product (2)”.
  • anodic oxide layer is formed on the surface of aluminum or the aluminum alloy by any one of the above-described various types of treating methods
  • it is recommended to impregnate silver in the anodic oxide layer by performing a treatment using a bath liquid which involves an aqueous solution further containing 10 gr/l to 30 gr/l of silver sulfate or silver nitrate, 15 gr/l to 20 gr/l of boric acid and 1 gr/l to 2 gr/l of nickel sulfate under the following conditions:
  • (k) voltage AC 10 V to 15 V;
  • the above-described treatment according to the present invention is referred to as “the present treatment (3)” and a product to be obtained thereby is referred to as “present product (3)”.
  • the above-described object according to the present invention can be attained by a method for forming an anodic oxide layer on a surface of aluminum or an aluminum alloy which is characterized in that an anodic oxide layer having a thickness of 300 ⁇ m to 600 ⁇ m is formed on a surface of aluminum or an aluminum alloy by any one of the above-described various treating methods and, after the above-described silver impregnation is performed on the layer, a surface layer was removed by polishing by a thickness of 50 ⁇ m to 100 ⁇ m and, then, an ultra-hard flat surface is obtained.
  • FIG. 1 is an explanatory view showing an embodiment of a device for carrying out a method for forming an anodic oxide layer on a surface of aluminum or an aluminum alloy according to the present invention.
  • FIG. 2 is an enlarged cross-sectional view showing a layer portion of aluminum or an aluminum alloy subjected to the present treatment (2).
  • reference numeral 1 denotes an electrolyte bath
  • reference numeral 2 denotes an AC power supply
  • reference numeral 3 denotes an aluminum or aluminum alloy member to be treated by the method according to the present invention
  • reference numeral 4 denotes a non-consumable electrode such as carbon or graphite
  • reference numeral 5 denotes a bath liquid involving a predetermined electrolytic solution.
  • the present treatment (1) performs an anodic oxidation treatment by using a device as shown in FIG. 1 and an aqueous solution containing 250 gr/l to 350 gr/l of sulfuric acid, 15 gr/l to 25 gr/l of nickel sulfate as a bath liquid under the following conditions:
  • the present invention is entirely different from the conventional method in the point that the anodic oxidation treatment is performed under the treating conditions of a high sulfuric acid ion concentration, a low temperature and a high current density.
  • Nickel sulfate is added for the purpose of enhancing hardness of the layer to be formed.
  • a desired anodic oxide layer can be formed by using any one of above-described bath liquids and adopting the following conditions:
  • a desired anodic oxide layer can be formed by adopting the following conditions:
  • the present invention When the present invention to be constituted as described above is compared with a conventional method, the present invention has such advantages as described below.
  • duralumin, a die cast alloy and all types of other aluminum alloys can be treated.
  • a layer having a thickness of about 30 to about 50 ⁇ m and, even at a maximum, about 100 ⁇ m can be formed.
  • a layer having a thickness as large as 300 to 500 ⁇ m can easily be formed.
  • the layer to be formed according to the conventional method although a surface layer thereof is hard (Vicker's hardness: 400 or less), an inside thereof is porous and hardness thereof is low.
  • a surface layer thereof is hard and a Vicker's hardness is about 450 to about 500.
  • a lower layer is denser and harder than a surface.
  • hardness becomes 800 to 1000 in terms of Vicker's hardness.
  • heat conductivity thereof is high and is comparable with that of copper.
  • the tray can favorably be utilized as a tray for unfreezing a frozen food.
  • a time period from the time of starting heating to the time of explosion of the popcorn is reduced from conventional 6 minutes to 3 minutes.
  • heat resistance is as high as about 800° C.
  • the layer to be formed by the method according to the present invention has an antibiotic action.
  • an aluminum material or an aluminum alloy material on which an anodic oxide layer is formed by the method according to the present invention can favorably be utilized in a wide field, for example, as a tray for ice-making or unfreezing, a rice cooker, a pan, a kettle, a teakettle and other cooking devices for heating, an instantaneous hot-water heater, a heat exchanger, an air-conditioner, a freezer, a refrigerator, an oil heater, a radiator, a cooling fin, an air- or water-cooled engine (acceleration of heat release), a wing of an airplane (de-icing), a heat sink for a semiconductor, a semiconductor package, a heat pipe, a bearing, various types of sliding members, a brake shoe, a manufacturing apparatus for popcorn or ice-cream, a chassis for an electric apparatus, a casing for a motor, an electric transformer or the like.
  • the anodic oxidation treatment is performed by using a bath liquid in which the bath liquid used in the above-described present treatment (1) is further added with a low polymerization acrylic resin composition in the range of from 280 gr/l to 320 gr/l.
  • the low polymerization acrylic resin composition to be added for example, an article containing, based on percentages, 68% of hydroxypropyl methacrylate, 10% of neopentyl glycol dimethacrylate, 19.5% of polypropylene glycol methacrylate, 1% of 1,6-hexanediol diglycidyl ether, 1% of butyl peroxyoctoate, 500 ppm of hydroquinone monmethyl ether and 0.3% of dicyandiamide is favorably used.
  • tartaric acid for the purpose of prevention of “burning”, it is recommended to further add tartaric acid to the above-described bath liquid in the range of from 5 gr/l to 15 gr/l.
  • an oxide layer which is a composite of aluminum oxide and the acrylic resin composition is formed. Namely, a metallurgical porous oxide layer and the acrylic resin composition are acid-ionized and polymerized therebetween and, then, form a tough and dense composite layer, to thereby enhance corrosion resistance and abrasion resistance to a great extent. Further, since the layer is formed while drawing out a gas in a pin-hole portion, the layer has characteristics such that pin-holes are small in number and, further, since the oxide layer is slowly formed at a low temperature, it is excellent in density and, since the layer is hard to be peeled off, it can be subjected to machining and a surface roughness thereof remains unchanged.
  • the anodic oxide layer obtained by the present treatment (2) is now explained with reference to an enlarged cross-sectional view showing a layer portion of FIG. 2 .
  • reference numeral 21 denotes an aluminum material or aluminum alloy material as a base metal
  • reference numeral 22 denotes an anodic oxide layer
  • reference numeral 23 denotes a barrier layer
  • reference numeral 24 denotes a porous layer portion
  • reference numeral 25 denotes an acrylic resin composition layer portion.
  • the anodic oxide layer 22 involves a barrier layer 23 formed on the aluminum material or aluminum alloy material 22 , a porous layer portion 24 formed thereon and an acrylic resin composition layer portion 25 which is impregnated inside the porous layer and fixed therein.
  • a tough and dense composite layer is formed.
  • the composite layer as a portion thereof is closer to the barrier layer 23 , the portion comes to have a higher hardness and becomes denser and, as described below, by removing a region close to a surface by machining, the surface having a further higher hardness can be obtained.
  • the present treatment (3) is performed, after the anodic oxide layer is formed on a surface of an aluminum or aluminum alloy by any one of the above-described various types of treating methods, it is characterized in that silver is impregnated in the anodic oxide layer by performing an anodic oxidation treatment using a bath liquid which involves an aqueous solution further containing 10 gr/l to 30 gr/l of silver sulfate or silver nitrate, 15 gr/l to 20 gr/l of boric acid and 1 gr/l to 2 gr/l of nickel sulfate under the following conditions:
  • Boric acid is added mainly for adjustment of electric conductivity of the electrolytic solution.
  • a silver ion is deeply impregnated inside the porous anodic oxide layer (electrolytically impregnated by alternating voltage) and, then, combines with aluminum oxide, to thereby form a tough dense composite layer.
  • the surface layer excellent in the heat conductance, the corrosion resistance, the abrasion resistance, the antibiotic action and the like can be formed.
  • the surface layer has the electric conductance and has a small coefficient of friction and a small color change in time.
  • the layer has effects such as far-infrared emission, removal of static electricity and the like.
  • Such present treatment (3) can be performed on all types of aluminum material and aluminum alloy material and can form a thick layer having various types of excellent characteristics as described above on the surface thereof.
  • an anodic oxide layer having a thickness of 300 ⁇ m to 600 ⁇ m is formed on a surface of aluminum or an aluminum alloy by the above-described various types of treating methods and, then, further, the above-described silver impregnation is performed and, thereafter, a surface layer is removed by polishing in a depth of from 50 to 100 ⁇ m from the surface and, subsequently, an aluminum material or aluminum alloy material having a ultra-hard smooth surface can be provided.
  • a surface hardness is high and is about 450 to about 500 in terms of Vicker's hardness.
  • a lower layer is denser than the surface and is higher in hardness.
  • the heat conductivity of the present product is higher than that of aluminum as a base metal and is comparable with that of copper.
  • This property shows that the present product is excellent as a raw material for various types of heat transfer members, diathermal members, heat releasing members.
  • the hardness (Hv) that of aluminum is 80, that of stainless steel is 200, that of the present product is 450. Accordingly, the hardness of the present product is more than twice that of stainless steal.
  • the upper temperature limit that of polytetrafluoroethylene is 260° C.; that of aluminum is 660° C.; and that of the surface layer of the present product is 800° C.
  • the present product can provide a flame-retardant shutter, heat-resistant wall material and the like.
  • an abrasion amount of the present product was one tenth the abrasion amount of ordinary hard-type alumite.
  • the abrasion test was conducted by arranging a test piece to be in a rotating side and a resin-type oil-less bearing material in a fixing side. Testing conditions were as follows: vibration speed: 1 m/s; face pressure: 20 kgf/cm 2 ; and test duration: 3 hours. As a result, the abrasion amount of the hard-type alumite was 2.5 ⁇ m while that of the present product was 0.25 ⁇ m.
  • a wear coefficient was measured by arranging the test piece to be in a rotating side and a resin-type oil-less bearing material in a fixing side. A load at the time the wear coefficient showed an abrupt increase was evaluated as a critical load of the burning-down.
  • the critical load of the ordinary hard-type alumite was 160 kgf/cm 2
  • that of the present product was 320 kgf/cm 2 .
  • TUFRAM trademark: a product prepared by subjecting hard-type alumite to a sintering treatment and, then, impregnating the resultant alumite with polytetrafluoroethylene.
  • Specimen 1 aluminum: a surface-treated article subjected to a silver-impregnating treatment according to the present invention (surface layer thickness: 25 ⁇ m)
  • samples were inoculated with Escherichia coli, Staphyloccocus aureus, Vibrio parahaemolyticus and Salmonella enteritidis by means of dropping respective bacterial liquids thereon and, after stored for 24 hours at 35° C., the number of viable bacteria in each of the samples was counted.
  • NA culture medium ordinary agar culture medium
  • NB culture medium ordinary bouillon culture medium added with 0.2% of meat extract
  • SA culture medium reference agar culture medium.
  • Bacteria used in the test were inoculated in an NA culture medium at 35° C. and incubated for 16 to 24 hours and, thereafter, again inoculated in an NA culture medium at 35° C. and incubated for 16 to 20 hours. After such incubation, the resultant fungus bodies of bacteria used in the test were dispersed in a 1/200 concentration NB culture medium and appropriately diluted in the 1/200 concentration NB culture medium such that the number of the fungus bodies come to be 10 5 to 10 6 , to thereby prepare a bacterial liquid. On this occasion, the NA culture medium and the 1/200 concentration NB culture medium which have been added with 3% of table salt were used for Vibrio parahaemolyticus RIMD 2210100.
  • a testing face of the sample was lightly wiped with absorbent cotton containing 99.9% (v/v) ethanol and, then, sufficiently dried.
  • 0.5 ml of a bacterial liquid was dropped on a sample and, then, after attached with a polyethylene layer, stored for 24 hours at 35° C. and, thereafter, the number of viable bacteria was counted. Further, 0.5 ml of the bacterial liquid was dropped in a plastic petri dish and, then, after attached with a polyethylene layer, allowed to be a reference sample and, thereafter, subjected to testing in a same manner as in the above. A parallel measurement was conducted three times.
  • Viable bacteria were washed out of each sample by using 9.5 ml of a SCDLP culture medium (available from Nihon Pharmaceutical Co., Ltd.).
  • the resultant washed-out liquid was subjected to a measurement of the number of viable bacteria by a pour plate culture method (incubated for 48 hours at 35° C.) using an SA culture medium, to thereby determine the number thereof per sample.
  • the SCDLP culture medium and the SA culture medium which have been added with 3% of table salt were used for Vibrio parahaemolyticus.
  • Reference* 2 1.8 ⁇ 10 7 1.7 ⁇ 10 7 2.4 ⁇ 10 7 Staphylococcus At start-up Reference* 2 4.6 ⁇ 10 5 3.4 ⁇ 10 5 4.4 ⁇ 10 5 aureus time After stored Specimen 1) 3.5 ⁇ 10 3 ⁇ 10 ⁇ 10 for 24 hrs. at Specimen 2) 1.1 ⁇ 10 4 1.2 ⁇ 10 3 1.0 ⁇ 10 5 35° C. Reference* 2 3.0 ⁇ 10 6 6.2 ⁇ 10 6 4.6 ⁇ 10 5 Vibrio At start-up Reference* 2 2.8 ⁇ 10 5 3.5 ⁇ 10 5 3.4 ⁇ 10 5 parahaemolyticus time After stored Specimen 1) ⁇ 10 20 2.6 ⁇ 10 2 for 24 hrs.
  • duralumin, a die cast alloy and all types of other aluminum alloys can be treated.
  • a layer having a thickness of about 30 to about 50 ⁇ m and, even at a maximum, about 100 ⁇ m can be formed.
  • a layer having a thickness as large as 300 to 500 ⁇ m can easily be formed.
  • the layer to be formed according to the conventional method although a surface layer thereof is hard (Vicker's hardness: 400 or less), an inside thereof is porous and hardness thereof is low.
  • a surface layer thereof is hard and a Vicker's hardness is about 450 to about 500.
  • a lower layer is denser and harder than a surface.
  • hardness becomes 800 to 1000 in terms of Vicker's hardness.
  • heat conductivity thereof is high and is comparable with that of copper.
  • the tray can favorably be utilized as a tray for unfreezing a frozen food.
  • a time period from the time of starting heating to the time of explosion of the popcorn is reduced from conventional 6 minutes to 3 minutes.
  • heat resistance is as high as about 800° C.
  • the layer to be formed by the method according to the present invention has an antibiotic action.
  • an aluminum material or an aluminum alloy material on which an anodic oxide layer is formed by the method according to the present invention can favorably be utilized in a wide field, for example, as a tray for ice-making or unfreezing, a rice cooker, a pan, a kettle, a teakettle and other cooking devices for heating, an instantaneous hot-water heater, a heat exchanger, an air-conditioner, a freezer, a refrigerator, an oil heater, a radiator, a cooling fin, an air- or water-cooled engine (acceleration of heat release), a wing of an airplane (de-icing), a heat sink for a semiconductor, a semiconductor package, a heat pipe, a bearing, various types of sliding members, a brake shoe, a manufacturing apparatus for popcorn or ice-cream, a chassis for an electric apparatus, a casing for a motor, an electric transformer or the like.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Laminated Bodies (AREA)
  • ing And Chemical Polishing (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
US10/542,533 2003-01-30 2004-01-27 Method for Forming Anodic Oxide Layer on Surface of Aluminum or Aluminum Alloy Abandoned US20070267299A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2003022682 2003-01-30
JP2003-22682 2003-01-30
PCT/JP2004/000684 WO2004067807A1 (fr) 2003-01-30 2004-01-27 Procede de fabrication d'un revetement d'oxyde anodique sur une surface d'aluminium ou d'alliage d'aluminium

Publications (1)

Publication Number Publication Date
US20070267299A1 true US20070267299A1 (en) 2007-11-22

Family

ID=32820698

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/542,533 Abandoned US20070267299A1 (en) 2003-01-30 2004-01-27 Method for Forming Anodic Oxide Layer on Surface of Aluminum or Aluminum Alloy

Country Status (11)

Country Link
US (1) US20070267299A1 (fr)
EP (1) EP1593758A4 (fr)
JP (1) JP4069135B2 (fr)
KR (1) KR20050103284A (fr)
CN (1) CN1745200A (fr)
AU (1) AU2004207220A1 (fr)
BR (1) BRPI0407080A (fr)
CA (1) CA2514271A1 (fr)
MX (1) MXPA05008032A (fr)
TW (1) TW200417635A (fr)
WO (1) WO2004067807A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110094715A1 (en) * 2009-09-18 2011-04-28 Mario Morini Method for anodizing metallic alloys, particularly for heat exchangers made of aluminum alloys and the like for condensing boilers
US20130228363A1 (en) * 2012-03-02 2013-09-05 Canon Components, Inc. Flexible circuit board
US20160153104A1 (en) * 2013-08-30 2016-06-02 Fujifilm Corporation Method for manufacturing metal-filled microstructure
US9957406B2 (en) 2011-07-21 2018-05-01 Tohoku University Method for smoothing a perfluoro alkoxy alkane film surface
US10506085B2 (en) 2014-12-26 2019-12-10 Byd Company Limited Electronic product metal shell having antenna groove

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009030736A (ja) * 2007-07-27 2009-02-12 Nitto Seiko Co Ltd 高硬度アルミニウム合金製ねじ部品
JP5301810B2 (ja) * 2007-11-13 2013-09-25 住友電気工業株式会社 陽極酸化アルミナ自立膜およびその製造方法
CN101629316B (zh) * 2009-06-19 2011-06-08 常州佳得顺抗菌材料科技有限公司 铝或铝合金材料的抗菌抗腐蚀及抗变色表面处理工艺
CN101886285A (zh) * 2010-06-25 2010-11-17 广东工业大学 一种制备表面抗菌不锈钢的方法
CN101994142B (zh) * 2010-12-09 2012-05-30 沈阳大学 一种铝材表面制备二氧化钛/铜纳米复合抗菌涂层的方法
CN102888643B (zh) * 2011-07-18 2015-09-02 汉达精密电子(昆山)有限公司 铝合金硬质阳极氧化电解液及方法
CN102312263A (zh) * 2011-08-22 2012-01-11 吴江市精工铝字制造厂 铝件的瓷质氧化方法
CN103498179B (zh) * 2013-10-22 2014-08-06 哈尔滨三泳金属表面技术有限公司 一种铝或铝合金表面氧化膜及其制备方法
CN107164797A (zh) * 2017-04-11 2017-09-15 浙江洋铭工贸有限公司 一种压铸铝采暖散热片的电泳工艺
CN113089049A (zh) * 2017-06-26 2021-07-09 石狮市星火铝制品有限公司 一种抗菌铝及其制造方法
CN107937953B (zh) * 2017-12-12 2019-10-25 北京小米移动软件有限公司 铝合金壳体及其制备方法
CN109943873B (zh) * 2017-12-21 2021-02-05 李文熙 电镀金属前处理的厚膜铝电极
WO2020067500A1 (fr) 2018-09-28 2020-04-02 株式会社三菱ケミカルホールディングス Matériau antimicrobien, corps stratifié, corps stratifié antimicrobien, élément médical, procédé de production de matériau antimicrobien, procédé de production de corps stratifié antimicrobien, et procédé antimicrobien
CN111778537A (zh) * 2020-07-06 2020-10-16 上海脉诺金属表面处理技术有限公司 一种抗菌防霉型铝合金的常温硬质氧化液
CN114260312A (zh) * 2021-12-22 2022-04-01 福建省欧麦鑫自动化科技有限公司 一种高强度无菌型金属罐及其加工工艺

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3870608A (en) * 1972-05-18 1975-03-11 Tokyo Metropolitan Government Process for coloring aluminum or aluminum alloys by anodizing with imperfectly rectified current
US4225399A (en) * 1979-04-25 1980-09-30 Setsuo Tomita High speed aluminum anodizing
US4822458A (en) * 1988-04-25 1989-04-18 The United States Of America As Represented By The Secretary Of The Navy Anodic coating with enhanced thermal conductivity
US5132003A (en) * 1989-05-16 1992-07-21 Minoru Mitani Process for surface treatment of aluminum or aluminum alloy
US20020157961A1 (en) * 2001-02-20 2002-10-31 Alenia Aeronautica S.P.A. Anodizing process, with low environmental impact, for a woodpiece of aluminum or aluminum alloys
US20030098240A1 (en) * 2000-07-10 2003-05-29 Werner Hesse Method for producing gold-coloured surfaces pertaining to aluminium or aluminium alloys, by means of formulations containing silver salt
US20080274375A1 (en) * 2007-05-04 2008-11-06 Duracouche International Limited Anodizing Aluminum and Alloys Thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1496891B2 (de) * 1966-12-10 1976-04-22 Langbein-Pfanhauser Werke Ag, 4040 Neuss Verfahren zum herstellen von harten anodischen oxidschichten auf aluminium und dessen legierungen
DE2811396A1 (de) * 1978-03-16 1979-09-27 Hoechst Ag Verfahren zur anodischen oxidation von aluminium und dessen verwendung als druckplatten-traegermaterial
US4133725A (en) * 1978-05-18 1979-01-09 Sanford Process Corporation Low voltage hard anodizing process
JPH0297698A (ja) * 1988-10-04 1990-04-10 Minoru Mitani アルミニウム又はその合金の表面処理方法
JPH10280191A (ja) * 1997-04-01 1998-10-20 Kobe Steel Ltd 抗菌性が優れたアルミニウム又はアルミニウム合金材及びその製造方法
JP2001152391A (ja) * 1999-11-25 2001-06-05 Soken:Kk アルミニウム並びにアルミニウム合金の表面処理法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3870608A (en) * 1972-05-18 1975-03-11 Tokyo Metropolitan Government Process for coloring aluminum or aluminum alloys by anodizing with imperfectly rectified current
US4225399A (en) * 1979-04-25 1980-09-30 Setsuo Tomita High speed aluminum anodizing
US4822458A (en) * 1988-04-25 1989-04-18 The United States Of America As Represented By The Secretary Of The Navy Anodic coating with enhanced thermal conductivity
US5132003A (en) * 1989-05-16 1992-07-21 Minoru Mitani Process for surface treatment of aluminum or aluminum alloy
US20030098240A1 (en) * 2000-07-10 2003-05-29 Werner Hesse Method for producing gold-coloured surfaces pertaining to aluminium or aluminium alloys, by means of formulations containing silver salt
US20020157961A1 (en) * 2001-02-20 2002-10-31 Alenia Aeronautica S.P.A. Anodizing process, with low environmental impact, for a woodpiece of aluminum or aluminum alloys
US20080274375A1 (en) * 2007-05-04 2008-11-06 Duracouche International Limited Anodizing Aluminum and Alloys Thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110094715A1 (en) * 2009-09-18 2011-04-28 Mario Morini Method for anodizing metallic alloys, particularly for heat exchangers made of aluminum alloys and the like for condensing boilers
US9957406B2 (en) 2011-07-21 2018-05-01 Tohoku University Method for smoothing a perfluoro alkoxy alkane film surface
US20130228363A1 (en) * 2012-03-02 2013-09-05 Canon Components, Inc. Flexible circuit board
US9119302B2 (en) * 2012-03-02 2015-08-25 Canon Components, Inc. Flexible circuit board
US20160153104A1 (en) * 2013-08-30 2016-06-02 Fujifilm Corporation Method for manufacturing metal-filled microstructure
US10506085B2 (en) 2014-12-26 2019-12-10 Byd Company Limited Electronic product metal shell having antenna groove

Also Published As

Publication number Publication date
EP1593758A1 (fr) 2005-11-09
EP1593758A4 (fr) 2006-11-29
TW200417635A (en) 2004-09-16
MXPA05008032A (es) 2006-01-27
CA2514271A1 (fr) 2004-08-12
AU2004207220A1 (en) 2004-08-12
CN1745200A (zh) 2006-03-08
JPWO2004067807A1 (ja) 2006-05-18
JP4069135B2 (ja) 2008-04-02
BRPI0407080A (pt) 2006-01-24
WO2004067807A1 (fr) 2004-08-12
KR20050103284A (ko) 2005-10-28

Similar Documents

Publication Publication Date Title
US20070267299A1 (en) Method for Forming Anodic Oxide Layer on Surface of Aluminum or Aluminum Alloy
Qin et al. Adaptive-lubricating PEO/Ag/MoS2 multilayered coatings for Ti6Al4V alloy at elevated temperature
RU2704340C1 (ru) Способ изготовления закаленных под прессом деталей из стальных листов или стальных лент с покрытием на основе алюминия и закаленная под прессом деталь из них
WO2008123632A1 (fr) Feuille d'acier plaqué pour boîte-boisson et procédé de production de cette feuille
WO2016076073A1 (fr) Tôle d'acier plaquée et procédé pour la production de cette dernière
Molak et al. Functional properties of the novel hybrid coatings combined of the oxide and DLC layer as a protective coating for AZ91E magnesium alloy
JP4869976B2 (ja) 缶用めっき鋼板及びその製造方法
JP3712229B2 (ja) アルミニウム又はその合金の表面処理方法
KR101168749B1 (ko) 알루미늄 및 알루미늄 합금 소재의 표면개질 방법
US3338805A (en) Process for anodizing titanium surfaces
CN1644760B (zh) 制造复合铝制品的方法
CN110872721B (zh) 有阳极氧化皮膜的金属成型体及制造方法、活塞及内燃机
CN2762703Y (zh) 一种耐磨抗蚀铁锅
CN212853265U (zh) 一种复合锅
JP4868466B2 (ja) アルミニウム又はアルミニウム合金の表面処理方法及びその表面処理方法により処理されたアルミニウム又はその合金製品
JP5777939B2 (ja) 陽極酸化膜生成方法
CN206761361U (zh) 一种防锈锅
JPH11229186A (ja) 抗菌・耐蝕性軽合金およびその製造方法
RU2214873C1 (ru) Способ обработки поверхности изделия из алюминия или сплава на его основе, предназначенного для приготовления пищи
JP2577246B2 (ja) 加工耐食性の優れた塗装下地用表面処理鋼板の製造方法
KR20130126793A (ko) 백색을 갖는 금속의 표면 처리 방법
CN218500517U (zh) 一种具有表面处理层的钛复合炊具
JP6274556B2 (ja) 電解めっき方法
Matijošius et al. Effects of electrolyte and Ti layers on static and dynamic friction of anodized alumina
CN1457737A (zh) 带锡镍合金保护层的铁锅及其制造方法

Legal Events

Date Code Title Description
STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION