WO2005056883A1 - 耐食性に優れた亜鉛系合金電気めっき皮膜およびこれを用いためっき金属材 - Google Patents
耐食性に優れた亜鉛系合金電気めっき皮膜およびこれを用いためっき金属材 Download PDFInfo
- Publication number
- WO2005056883A1 WO2005056883A1 PCT/JP2004/018535 JP2004018535W WO2005056883A1 WO 2005056883 A1 WO2005056883 A1 WO 2005056883A1 JP 2004018535 W JP2004018535 W JP 2004018535W WO 2005056883 A1 WO2005056883 A1 WO 2005056883A1
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- WO
- WIPO (PCT)
- Prior art keywords
- zinc
- based alloy
- plating
- weight
- corrosion resistance
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc
Definitions
- the present invention relates to a zinc-based alloy electroplated film having excellent corrosion resistance and a metal material using the same, and can be used in a wide range of fields such as automobiles, home electric appliances, and building materials.
- Acidic baths include sulfuric acid baths, ammonium chloride baths, potassium chloride baths, and ammonium chloride'potassium chloride baths.
- Alkaline baths include cyanide baths and zincate baths, which are used according to their characteristics.
- metal materials used in automobiles, home appliances, building materials, etc. which are exposed to harsh environments, may not be able to obtain sufficient heat resistance in some cases, even if these plated metal materials are used. Is required to be improved. Under these circumstances, zinc-based alloy-coated metal materials such as zn-Fe, Zn-Ni, and Zn-Cr have been developed. Is disclosed to have high corrosion resistance (see, for example, Patent Document 1, Patent Document 2, Patent Document 3, etc.).
- Zn-Cr alloy plating has a remarkable effect of suppressing corrosion due to Cr present in the film, and the film keeps a relatively low potential without being passivated. All sacrificial corrosion protection is effective for a long period of time. Also have excellent corrosion resistance.
- Patent document 1 Japanese Patent Application Laid-Open No. Sho 644-553997
- Patent Document 2 Japanese Patent Publication No. 2-5-1996
- Patent Literature 3 Japanese Patent Publication No. 3-2 949
- An object of the present invention is to provide a zinc-based alloy electroplating film having high corrosion resistance comparable to that of a Zn-Cr alloy coating without containing chromium, which has a large environmental load, and a metal material using the same. It is to be.
- the present inventors have conducted intensive studies to solve the above problems, and as a result, it has been found that corrosion resistance can be significantly improved by using zinc as a base material and a specific amount of iron group metal and tungsten as a plating film. They have found that they can do this and have completed the present invention. .
- the present invention provides (A) 30 to 96% by weight of zinc,
- the present invention relates to a zinc-based alloy electroplating film having excellent corrosion resistance, characterized by comprising:
- the present invention also relates to a plated metal material having the zinc-based alloy electroplating film.
- the zinc alloy electroplating film of the present invention contains zinc (A), iron group metal (B) and tungsten (C) as essential components.
- the composition of the plating film is zinc (A) 30 to 96% by weight / 0 , preferably 50 to 90% by weight, and iron group metal (B) 2 to 20% by weight, preferably -15% by weight, tungsten (C) 2-50% by weight, 3-2 °% by weight.
- iron group metal (B) refers to iron, cobalt and nickel. Alloy coatings of zinc and iron group metals are generally known, but by further combining tungsten therewith, the corrosion resistance of the resulting alloy coatings is significantly improved. In particular, the use of iron as the iron group metal (B) has a great effect, and it is preferable to use iron. However, a system in which iron is used in combination with cobalt and / or nickel also has good corrosion resistance.
- the zinc-based alloy electroplating film of the present invention is prepared by using a plating solution containing Zn ions (a), iron group metal ions (b) and W ions (c), as described below, to form a steel strip or the like.
- the secondary molded product which includes small parts such as bolts and press molded products, is stored in a perforated container, such as a rotatable barrel or a power wrench, by applying continuous electric plating to the next molded product. It is formed by plating.
- Zn ion which is a component (a) of the above plating solution, constitutes a main component of the plating layer.
- Zn ions are added to the plating bath in the form of chlorides, sulfates, fluorides, cyanides, oxides, organic acid salts, phosphates or simple metals.
- the iron group metal ion as the component (b) of the plating solution is selected from Ni ions, Co ions, and Fe ions.
- the iron group element ion (b) is added to the plating bath in the form of chloride, sulfate, fluoride, cyanide, oxide, organic acid salt, phosphate or simple metal. "W ion (c)"
- W ions which are component (c) of the above plating solution, are added to the plating bath in the form of a tungstic acid compound.
- Examples of the tandastanoic acid-based compound include tungstic acid, tandastenoate, phosphotungstic acid and phosphotungstate, and examples of the salt include ammonium salt, potassium salt, calcium salt, and sodium salt. Can be. Of these, sodium tungstate and ammonium tungstate are particularly preferred from the viewpoint of corrosion resistance.
- the above plating liquid includes metal ions other than the above (a), (b) and (c), for example,
- Mg, Mn, Ti, Pb, Al, P and the like may be added.
- a complexing agent such as citrate, tartrate, and gluconate; aminoanoreconoles such as monoethanolamine, diethanolamine, and triethanolamine; ethylenediamine (ED A ), Polyamines such as diethylenetriamine and triethylenetetramine, aminocarboxylates such as ethylendiaminetetraacetate and nitroacetate, polyhydric alcohols such as sorbit and pentaerythritol, and mixtures thereof. Can be selected.
- oxycarboxylates such as citrate, tartrate, and gluconate
- aminoanoreconoles such as monoethanolamine, diethanolamine, and triethanolamine
- ED A ethylenediamine
- Polyamines such as diethylenetriamine and triethylenetetramine
- aminocarboxylates such as ethylendiaminetetraacetate and nitroacetate
- polyhydric alcohols such as sorbit and pentaerythritol, and mixtures thereof.
- functions such as high corrosion resistance and paint adhesion can be imparted by combining a corrosion inhibiting pigment and / or ceramic particles which can be precipitated as discontinuous particles from the electroplating liquid.
- pigments As the above-mentioned corrosion-inhibiting pigment, generally known pigments can be used, and preferable examples thereof include phosphate, molybdate, metaborate, and silicate.
- the ceramic particles for example, A 1 2 0 3, S i 0 2, T i 0 2, Z r 0 2, Y 2 O 2, oxidation of such Th_ ⁇ 2, C e 0 2s F e 2 0 3 things; B 4 C, S i C , WC, Z r C, T i C, graphite, carbides such as graphite fluoride; BN, S i 3 N 4 , nitrides such as T i ⁇ ; C r 3 B 2, borides such as Z r B 2; 2 M g O 'S I_ ⁇ 2, M g O ⁇ S I_ ⁇ 2, Z r O 2 ⁇ S i 0 2 silicate, etc., and the like.
- the mixing amount of the corrosion inhibiting pigment and / or the ceramic particles in the plating bath is preferably in the range of 5 to 500 g per liter. Ultra-fine particles of 1 m or less are preferred because smaller particles have better dispersion stability.
- the amount of eutectoid in the plating matrix is preferably in the range of 1 to 30% by weight, and more preferably 1 to 10% by weight, based on the total amount of precipitation. If the amount of eutectoid is small, the effect of improving the corrosion resistance is not exhibited, and if it exceeds 30% by weight, the coating film becomes brittle or the adhesion to the base material is reduced, which is problematic.
- a corrosion inhibiting organic compound may be further added to the plating bath.
- Preferred corrosion inhibiting organic compounds include, for example, alkynes, alkynols, amines or salts thereof, thio compounds, aromatic carboxylic acid compounds or salts thereof, and heterocyclic compounds.
- alkynes are organic compounds containing a carbon-carbon triple bond, and include, for example, pentine, hexine, heptin, octin and the like.
- the alkynols are organic compounds having one or more hydroxyl groups in the alkynes, and include, for example, propargyl alcohol, 11-hexol 13-ol, 11-heptin 13-ol, and the like.
- Amines are organic compounds containing one or more nitrogen atoms in the molecule, and include both aliphatic and aromatic compounds. Examples of such amines include octylamine, nonylamine, decylamine, laurylamine, tridecylamine, cetylamine and the like.
- the thio compound means an organic compound containing one or more sulfur atoms in the molecule.
- Examples of such a thio compound include decyl mercaptan, cetyl mercaptan, and thiourea.
- a heterocyclic compound means an organic compound in which a ring molecule contains an atom other than carbon as a ring constituent element.
- Examples of such a heterocyclic compound include pyridine, benzothiazole, benzotriazole, and quinoline. , Indole, etc. No.
- aromatic carboxylic acid compound examples include benzoic acid, salicylic acid, toluic acid, and naphthalene carboxylic acid.
- salts of amines and carboxylic acid compounds can be used, and the same effect can be obtained in this case.
- an acid addition salt such as a sulfate or a hydrochloride can be used.
- a metal salt such as an alkali metal salt or a zinc salt or an ammonium salt can be used.
- the amount of the corrosion inhibiting organic compound added to the plating bath is 0.1 to 10% by weight for alkynes and alkynols, and 3 to 10% by weight for amines or salts thereof. /. In addition, 0.2 to 5 weights for thio compounds. /. It is desirable to adjust the amount to 1 to 10% by weight for a heterocyclic compound and 3 to 8% by weight for an aromatic carboxylic acid compound or a salt thereof.
- a plating bath with the addition of the corrosion inhibiting organic compound, it is possible to form a plating film having a C (carbon) content of 0.001 to 10% by weight on the metal material.
- measurement of carbon content in the plating film is a combustion method, for example, the organic matter is burned, by measuring the "C-S analysis apparatus" for measuring the absorbance in the infrared absorption band of the resulting co 2 It is possible.
- the above-mentioned plating liquid can contain additives that are commonly used for the purpose of improving the coverage at high current densities and improving the throwing power at low current densities.
- additives that are commonly used for the purpose of improving the coverage at high current densities and improving the throwing power at low current densities. Examples of these include a reaction product of amine and epihalohydrin, polyethylene polyamine, other quaternary amine polymers, urea, thiourea, gelatin, polybutyl alcohol, aldehyde, and the like.
- the above-mentioned plating bath composition is excellent in corrosion resistance and coating film adhesion by electroplating in the same manner as in the prior art, so that a coating film can be formed.
- the plating bath is a sulfuric acid bath
- the bath temperature is about 30 to 80 ° C
- the chloride bath is, the pH is about 4 to 7
- the temperature is about 10 to 50 ° C
- the pH is preferably 12 or more in the case of an alkaline bath
- the bath temperature is preferably about 10 to 50 ° C
- the plating film thickness is 0.5 to 1 in all cases.
- About 0 ⁇ is suitable.
- the metal material for electroplating of the present invention can be obtained by electroplating a metal material using the above electroplating liquid composition to form a plating film.
- the metal material include a material containing iron as a main component, for example, a material for a car, a home appliance, or a building material processed into a shape of a plate, a pipe, a joint, a clamp, a bolt, a nut, and the like.
- a post-treatment is carried out with an acidic aqueous solution of a compound containing at least one element selected from the group consisting of cobalt, nickel, titanium and zirconium.
- a compound containing at least one element selected from the group consisting of cobalt, nickel, titanium, and zirconium include oxides, hydroxides, fluorides, complex fluorides, and chlorides of these metal elements. , Nitrate, sulfate, carbonate and the like can be used.
- cobalt nitrate, zirconium oxynitrate, titanium hydrofluoric acid, zircon hydrofluoric acid, ammonium titanium hydrofluoride, zircon hydrofluoric acid Preferred are ammonium and the like.
- the acidic aqueous solution of the compound containing these metal elements preferably has a pH of 1 or more and less than 7, preferably 3 or more and 6 or less, such as hydrochloric acid, nitric acid, sulfuric acid, and hydrofluoric acid.
- the pH can be adjusted with an acid or an alkali such as sodium hydroxide, potassium hydroxide, and amines.
- a complexing agent, silica particles, or the like may be added to the acidic aqueous solution.
- the addition amount of the compound containing a metal element is preferably from 0.001 to 5 mol 1 Z1, particularly preferably from 0.01 to: Lmol / 1.
- a metal material is immersed in a treatment solution having a bath temperature of 20 to 80 ° C., preferably 30 to 60 ° C. for 5 seconds or more, preferably 20 to 90 seconds.
- a treatment solution having a bath temperature of 20 to 80 ° C., preferably 30 to 60 ° C. for 5 seconds or more, preferably 20 to 90 seconds.
- it can be performed by bringing the electroplated film into contact with the treatment liquid.
- the thus-obtained electroplated metal material is usually subjected to a surface treatment and, if necessary, a paint.
- the surface treatment is usually performed with a chromate-based surface treatment agent or a phosphate-based surface treatment agent.
- the electroplated metal material of the present invention has excellent corrosion resistance, it can be used in combination with a chromium-free, environmentally friendly surface treatment agent. Also exhibits excellent corrosion resistance. In order to reduce the environmental burden, it is preferable to combine with a chromium-free environment-friendly surface treatment agent.
- the paint for applying to the metal material with an electric plating according to the present invention is not particularly limited, and any of a curing method such as a normal drying type, a heat curing type, and an active energy ray curing type can be used. Any type of paint such as solvent-based paint, water-based paint, and powder paint may be used.
- the electrodeposition coating, the intermediate coating, and the top coating are generally sequentially applied and baked after a phosphate treatment on the plating film. It is a target. Examples>
- a cold-rolled steel sheet with a thickness of 0.8 mm and a size of 7 Omm X 15 Omm is alkali-degreased, washed with water, and then subjected to a predetermined metal ion, corrosion-inhibiting pigment, corrosion-inhibiting organic compound,
- the plating was performed in an acidic plating bath containing ceramic particles.
- the composition of the film was adjusted by changing the metal ion concentration ratio in the plating bath, the current density, and the bath temperature, and was controlled by appropriately selecting the plating film deposition time.
- Table 1 below shows the coating composition (wt%) and film thickness of the plating layers studied.
- the coating composition and film thickness of the plating layer were measured with a fluorescent X-ray analyzer SEA5200 (manufactured by Seiko Instruments Inc.).
- each metal ion used for the test was supplied from the following compound.
- B 1 Fine particles, average particle size about 0.02 ⁇ m.
- B 2 anoremina fine particles, average particle size about 0.01 ⁇ m.
- Magnetic 100 White (Kansai Paint Co., Ltd., acryl-melamine resin paint, white) is applied to the zinc phosphate treated steel sheet obtained in this manner so that the dry film thickness becomes 30 ⁇ . It was applied and baked at 160 ° C. for 20 minutes to obtain a test coated plate.
- top coat adhesion The test coated plate was immersed in boiling water at about 98 ° C for 2 hours, pulled up and left at room temperature for 2 hours. One scratch was placed in a grid pattern to create 100 square cells of 2 mm square. A cellophane adhesive tape was closely adhered to the cross section, and the peeled area of the coating film when the tape was instantaneously peeled was evaluated according to the following criteria.
- Peeling area is 25% or more and less than 50%.
- the peeling area is 50% or more.
- the test coated plate was fixed to a test piece holder of a stepping stone tester JA-400 (Tibbing tester manufactured by Suga Test Instruments Co., Ltd.) so as to be perpendicular to the stone spout.
- a stepping stone tester JA-400 Tebbing tester manufactured by Suga Test Instruments Co., Ltd.
- 50 g of granite No. 7 granite was sprayed onto the painted surface with 0.294MPs (3 kgf / cm 2 ) compressed air, and the degree of scratching of the resulting coating film was visually observed. And evaluated according to the following criteria.
- ⁇ The size of the scratch is small, and the intermediate coating film is exposed.
- ⁇ The size of the flaw is small, but the base steel sheet is exposed.
- Peeling area is 10% or more and less than 25%.
- Peeling area is 25. /. Not less than 50%.
- the peeled area is 50% or more.
- a titanium-based undercoating agent prepared by the following process was applied on the surface using a bar coater so that the dry film thickness was 0.5 xm. Then, the substrate was heated for 10 seconds under the condition that the PMT (maximum temperature of the steel sheet) reached 100 ° C to prepare a ground-treated sheet. Then, add “ ⁇ :? Color 800”
- Primer modified epoxy resin paint, manufactured by Kansai Paint Co., Ltd.
- a bar coater to a dry film thickness of 5 ⁇ m, and heated for 20 seconds at a PMT of 210 ° C for coating.
- “? Color 1 580 White” a polyester resin paint manufactured by Kansai Paint Co., Ltd.
- Heat for 40 seconds at 5 ° C thus, each test coated plate having an upper layer coating film was prepared.
- Adhesion of coating film One hundred and one lmm-square cells were formed on the coating film surface of the test coated plate by making 11 scratches of length and width reaching the substrate with a knife in a grid pattern. The degree of peeling of the coating film when the cellophane adhesive tape was brought into close contact with the grid and the tape was instantaneously peeled off was evaluated according to the following criteria.
- Peeling area is 25% or more and less than 50%.
- the peeling area is 50% or more.
- ⁇ The width of one side bulge from the cross cut is less than 1 mm.
- ⁇ The width of one side bulge from the cross cut is 1 mm or more and less than 2 mm.
- One side blister width from cross cut is 2 mm or more and less than 5 mm.
- the cross-cut collar has a blister width of 5 mm or more on one side.
- the steel bolts were degreased with alkali and washed with water, they were immersed in a 1% sulfuric acid solution at room temperature for 30 seconds to perform activation treatment. Thereafter, using a batch-type barrel plating apparatus, plating was performed in an alkaline plating bath containing predetermined metal ions, a corrosion-inhibiting pigment, a corrosion-inhibiting organic compound, and ceramic particles shown in Table 1.
- the composition of the film was adjusted by changing the metal ion concentration ratio in the plating bath, the current density, and the bath temperature, and the plating film thickness was controlled by appropriately selecting the plating time. afterwards,
- the zinc-based alloy electroplating film of the present invention is obtained by adding a specific amount of iron group metal and tungsten to zinc.
- the metal material having remarkably improved corrosion resistance and having the zinc-based alloy electroplating film is particularly useful as a metal member for automobiles.
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04801681A EP1719825A4 (en) | 2003-12-09 | 2004-12-07 | GALVANIC ZINC ALLOY COATING WITH EXCELLENT CORROSION RESISTANCE AND GALVANICALLY COATED METAL MATERIAL THEREWITH |
JP2005516213A JPWO2005056883A1 (ja) | 2003-12-09 | 2004-12-07 | 耐食性に優れた亜鉛系合金電気めっき皮膜およびこれを用いためっき金属材 |
US10/596,307 US20080028976A1 (en) | 2003-12-09 | 2004-12-07 | Electroplated Coating of Zinc Alloy with Excellent Corrosion Resistance and Plated Metal Material Having Same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003410746 | 2003-12-09 | ||
JP2003-410746 | 2003-12-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005056883A1 true WO2005056883A1 (ja) | 2005-06-23 |
Family
ID=34674952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/018535 WO2005056883A1 (ja) | 2003-12-09 | 2004-12-07 | 耐食性に優れた亜鉛系合金電気めっき皮膜およびこれを用いためっき金属材 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080028976A1 (ja) |
EP (1) | EP1719825A4 (ja) |
JP (1) | JPWO2005056883A1 (ja) |
CN (1) | CN1914357A (ja) |
WO (1) | WO2005056883A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016069663A (ja) * | 2014-09-26 | 2016-05-09 | Jfeスチール株式会社 | 耐指紋性および白色度に優れた亜鉛系電気めっき鋼板の製造方法 |
CN113333256A (zh) * | 2021-06-08 | 2021-09-03 | 任诚(上海)新材料有限公司 | 一种不锈钢覆膜板材及其制造工艺 |
CN114732944A (zh) * | 2022-04-07 | 2022-07-12 | 北京大学 | 一种复合结构锌基棒材及其制备方法 |
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US20140273407A1 (en) * | 2013-03-14 | 2014-09-18 | First Solar, Inc. | Formulations And Methods For Surface Cleaning And Passivation of CdTe Substrates |
CN106086953B (zh) * | 2016-08-10 | 2018-05-15 | 江苏鑫冶金属板业有限公司 | 一种复合电解板的制备方法 |
MX2022007618A (es) * | 2019-12-23 | 2022-09-12 | Dipsol Chem | Ba?o de chapado compuesto de zinc-niquel-silice y metodo para chapar usando el ba?o de chapado. |
CZ309341B6 (cs) * | 2021-04-13 | 2022-09-07 | Výzkumný a zkušební letecký ústav, a.s. | Slitinový povlak pro ochranu kovových povrchů a způsob jeho přípravy |
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2004
- 2004-12-07 US US10/596,307 patent/US20080028976A1/en not_active Abandoned
- 2004-12-07 CN CNA2004800414980A patent/CN1914357A/zh active Pending
- 2004-12-07 WO PCT/JP2004/018535 patent/WO2005056883A1/ja not_active Application Discontinuation
- 2004-12-07 EP EP04801681A patent/EP1719825A4/en not_active Withdrawn
- 2004-12-07 JP JP2005516213A patent/JPWO2005056883A1/ja active Pending
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Cited By (5)
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JP2016069663A (ja) * | 2014-09-26 | 2016-05-09 | Jfeスチール株式会社 | 耐指紋性および白色度に優れた亜鉛系電気めっき鋼板の製造方法 |
CN113333256A (zh) * | 2021-06-08 | 2021-09-03 | 任诚(上海)新材料有限公司 | 一种不锈钢覆膜板材及其制造工艺 |
CN113333256B (zh) * | 2021-06-08 | 2022-05-20 | 任诚(上海)新材料有限公司 | 一种不锈钢覆膜板材及其制造工艺 |
CN114732944A (zh) * | 2022-04-07 | 2022-07-12 | 北京大学 | 一种复合结构锌基棒材及其制备方法 |
CN114732944B (zh) * | 2022-04-07 | 2023-01-13 | 北京大学 | 一种复合结构锌基棒材及其制备方法 |
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JPWO2005056883A1 (ja) | 2007-12-13 |
EP1719825A1 (en) | 2006-11-08 |
US20080028976A1 (en) | 2008-02-07 |
EP1719825A4 (en) | 2007-07-18 |
CN1914357A (zh) | 2007-02-14 |
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