CN113529063A - High-temperature-resistant coating aluminum shell treatment method - Google Patents
High-temperature-resistant coating aluminum shell treatment method Download PDFInfo
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- CN113529063A CN113529063A CN202010313674.2A CN202010313674A CN113529063A CN 113529063 A CN113529063 A CN 113529063A CN 202010313674 A CN202010313674 A CN 202010313674A CN 113529063 A CN113529063 A CN 113529063A
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- aluminum shell
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000011248 coating agent Substances 0.000 title claims abstract description 20
- 238000000576 coating method Methods 0.000 title claims abstract description 20
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 33
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 32
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000011259 mixed solution Substances 0.000 claims abstract description 17
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 16
- 238000007598 dipping method Methods 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 229920000742 Cotton Polymers 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- 239000002904 solvent Substances 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 11
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims abstract description 10
- 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 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000007739 conversion coating Methods 0.000 claims abstract description 6
- 238000005238 degreasing Methods 0.000 claims abstract description 6
- 239000004744 fabric Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 230000003647 oxidation Effects 0.000 claims abstract description 6
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims description 16
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 6
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims description 3
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000004904 shortening Methods 0.000 abstract description 5
- 230000002708 enhancing effect Effects 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/56—Treatment of aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/78—Pretreatment of the material to be coated
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/12—Light metals
- C23G1/125—Light metals aluminium
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- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a high-temperature-resistant coating aluminum shell treatment method, which comprises the following steps: degreasing treatment: wiping with absorbent cotton soaked with solvent, and wiping with clean cotton cloth; oil removal: preparing a container, adding phosphoric acid, chromic oxide, alcohol and formaldehyde into the container, stirring and mixing uniformly, and placing an aluminum shell to be treated into a mixed solution in the container for dipping; removing an oxidation film: removing the oxide film on the surface of the aluminum shell; chemical conversion: dipping the aluminum shell into a mixed solution consisting of chromic acid, phosphoric acid and hydrofluoric acid to produce a conversion coating on the aluminum shell; cleaning: cleaning with clear water; the invention has the beneficial effects that: dipping the aluminum shell in a mixed solution consisting of chromic acid, phosphoric acid and hydrofluoric acid, and dipping for 6-12min at 50-70 ℃ to produce a conversion film on the aluminum shell; the free acidity is stable and convenient to master, which is beneficial to shortening the chemical conversion time and improving the production efficiency; the coating is beneficial to enhancing the binding force of the coating and improving the corrosion resistance.
Description
Technical Field
The invention belongs to the technical field of high-temperature-resistant film-coated aluminum shells, and particularly relates to a high-temperature-resistant film-coated aluminum shell treatment method.
Background
The successful development of the high-temperature-resistant film-coated aluminum shell breaks through foreign technical blockade, and brings a new development opportunity for domestic chip capacitor production enterprises. The coating aluminum shell has special requirements on high temperature resistance, insulating property and the like, and can not be produced by domestic enterprises until now; due to various factors such as price, the import rate of the capacitor in China is greatly reduced as long as the problem of the aluminum shell is solved.
Besides being applied to the field of chip capacitors and solid capacitors, the high-temperature-resistant film-coated aluminum shell can be expanded to chip inductors, chip resistors and other related electronic products, and has a wide industrialization prospect.
In order to improve the processing efficiency and reduce the processing time, a high-temperature-resistant coating aluminum shell processing method is proposed.
Disclosure of Invention
The invention aims to provide a high-temperature-resistant coating aluminum shell treatment method, which improves the treatment efficiency and reduces the treatment time.
In order to achieve the purpose, the invention provides the following technical scheme: a high-temperature-resistant coated aluminum shell treatment method comprises the following steps:
the method comprises the following steps: degreasing treatment: wiping with absorbent cotton soaked with solvent, and wiping with clean cotton cloth;
step two: oil removal: preparing a container, adding phosphoric acid, chromic oxide, alcohol and formaldehyde into the container, stirring and mixing uniformly, and placing an aluminum shell to be treated into a mixed solution in the container for dipping;
step three: removing an oxidation film: removing the oxide film on the surface of the aluminum shell;
step four: chemical conversion: dipping the aluminum shell into a mixed solution consisting of chromic acid, phosphoric acid and hydrofluoric acid to produce a conversion coating on the aluminum shell;
step five: cleaning: cleaning with clear water;
step six: drying: and (4) placing the cleaned aluminum shell into a dryer for drying.
As a preferred technical scheme of the invention, in the first step, the solvent is one or more of trichloroethylene, ethyl acetate, acetone and butanone.
In a preferred embodiment of the present invention, in the second step, the concentration of formaldehyde is 30-40%.
In the second step, the aluminum shell to be treated is put into the mixed solution in the container and is soaked for 4-8min at 20-40 ℃.
In the fourth step, the aluminum shell is immersed in a mixed solution of chromic acid, phosphoric acid and hydrofluoric acid at 50-70 ℃ for 6-12 min.
In a preferred technical scheme of the invention, in the fifth step, the washing is carried out by using clear water at the temperature of 40-60 ℃.
As a preferable technical scheme of the invention, in the sixth step, the moisture content after drying is less than 8%.
Compared with the prior art, the invention has the beneficial effects that:
dipping the aluminum shell in a mixed solution consisting of chromic acid, phosphoric acid and hydrofluoric acid, and dipping for 6-12min at 50-70 ℃ to produce a conversion film on the aluminum shell; the free acidity is stable and convenient to master, which is beneficial to shortening the chemical conversion time and improving the production efficiency; the coating is beneficial to enhancing the binding force of the coating and improving the corrosion resistance.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, the present invention provides a technical solution: a high-temperature-resistant coating aluminum shell treatment method comprises the following steps:
the method comprises the following steps: degreasing treatment: wiping with absorbent cotton soaked with solvent, and wiping with clean cotton cloth; the solvent is trichloroethylene and ethyl acetate;
step two: oil removal: preparing a container, adding phosphoric acid, chromic oxide, alcohol and formaldehyde into the container, stirring and mixing uniformly, placing an aluminum shell to be treated into the mixed solution in the container, and soaking for 8min at 20 ℃; the concentration of formaldehyde is 30%; the oil stain removing device is beneficial to better removing oil stains on the surface of the aluminum shell;
step three: removing an oxidation film: the oxide film naturally formed on the surface is an uneven discontinuous film, and must be thoroughly removed before coating, and nitric acid can be used for removing the oxide film on the surface of the aluminum shell;
step four: chemical conversion: dipping the aluminum shell in a mixed solution consisting of chromic acid, phosphoric acid and hydrofluoric acid, and dipping for 12min at 50 ℃ to produce a conversion coating on the aluminum shell; the free acidity is stable and convenient to master, which is beneficial to shortening the chemical conversion time and improving the production efficiency; the binding force of the coating film is enhanced, and the corrosion resistance is improved;
step five: cleaning: washing with clear water at 40 deg.C;
step six: drying: and (3) drying the cleaned aluminum shell in a dryer, wherein the moisture content after drying is less than 8%.
Example 2
Referring to fig. 1, the present invention provides a technical solution: a high-temperature-resistant coating aluminum shell treatment method comprises the following steps:
the method comprises the following steps: degreasing treatment: wiping with absorbent cotton soaked with solvent, and wiping with clean cotton cloth; the solvent is ethyl acetate and acetone;
step two: oil removal: preparing a container, adding phosphoric acid, chromic oxide, alcohol and formaldehyde into the container, stirring and mixing uniformly, placing an aluminum shell to be treated into a mixed solution in the container, and soaking for 6min at 30 ℃; the concentration of formaldehyde is 35%; the oil stain removing device is beneficial to better removing oil stains on the surface of the aluminum shell;
step three: removing an oxidation film: the oxide film naturally formed on the surface is an uneven discontinuous film, and must be thoroughly removed before coating, and nitric acid can be used for removing the oxide film on the surface of the aluminum shell;
step four: chemical conversion: dipping the aluminum shell in a mixed solution consisting of chromic acid, phosphoric acid and hydrofluoric acid, and dipping for 9min at 60 ℃ to produce a conversion coating on the aluminum shell; the free acidity is stable and convenient to master, which is beneficial to shortening the chemical conversion time and improving the production efficiency; the binding force of the coating film is enhanced, and the corrosion resistance is improved;
step five: cleaning: cleaning with clear water at 50 ℃;
step six: drying: and (3) drying the cleaned aluminum shell in a dryer, wherein the moisture content after drying is less than 8%.
Example 3
Referring to fig. 1, the present invention provides a technical solution: a high-temperature-resistant coating aluminum shell treatment method comprises the following steps:
the method comprises the following steps: degreasing treatment: wiping with absorbent cotton soaked with solvent, and wiping with clean cotton cloth; the solvent is butanone;
step two: oil removal: preparing a container, adding phosphoric acid, chromic oxide, alcohol and formaldehyde into the container, stirring and mixing uniformly, placing an aluminum shell to be treated into the mixed solution in the container, and soaking for 4min at 40 ℃; the concentration of formaldehyde is 40%; the oil stain removing device is beneficial to better removing oil stains on the surface of the aluminum shell;
step three: removing an oxidation film: the oxide film naturally formed on the surface is an uneven discontinuous film, and must be thoroughly removed before coating, and nitric acid can be used for removing the oxide film on the surface of the aluminum shell;
step four: chemical conversion: dipping the aluminum shell in a mixed solution consisting of chromic acid, phosphoric acid and hydrofluoric acid, and dipping for 6min at 70 ℃ to produce a conversion coating on the aluminum shell; the free acidity is stable and convenient to master, which is beneficial to shortening the chemical conversion time and improving the production efficiency; the binding force of the coating film is enhanced, and the corrosion resistance is improved;
step five: cleaning: washing with clear water at 60 deg.C;
step six: drying: and (3) drying the cleaned aluminum shell in a dryer, wherein the moisture content after drying is less than 8%.
The water washing and drying contribute to enhancing the hardness of the film.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A high-temperature-resistant coating aluminum shell treatment method is characterized by comprising the following steps: the treatment method comprises the following steps:
the method comprises the following steps: degreasing treatment: wiping with absorbent cotton soaked with solvent, and wiping with clean cotton cloth;
step two: oil removal: preparing a container, adding phosphoric acid, chromic oxide, alcohol and formaldehyde into the container, stirring and mixing uniformly, and placing an aluminum shell to be treated into a mixed solution in the container for dipping;
step three: removing an oxidation film: removing the oxide film on the surface of the aluminum shell;
step four: chemical conversion: dipping the aluminum shell into a mixed solution consisting of chromic acid, phosphoric acid and hydrofluoric acid to produce a conversion coating on the aluminum shell;
step five: cleaning: cleaning with clear water;
step six: drying: and (4) placing the cleaned aluminum shell into a dryer for drying.
2. The method for processing the high-temperature-resistant coated aluminum shell according to claim 1, wherein: in the first step, the solvent is one or more of trichloroethylene, ethyl acetate, acetone and butanone.
3. The method for processing the high-temperature-resistant coated aluminum shell according to claim 1, wherein: in the second step, the concentration of the formaldehyde is 30-40%.
4. The method for processing the high-temperature-resistant coated aluminum shell according to claim 1, wherein: in the second step, the aluminum shell to be treated is placed in the mixed liquid in the container and is soaked for 4-8min at the temperature of 20-40 ℃.
5. The method for processing the high-temperature-resistant coated aluminum shell according to claim 1, wherein: in the fourth step, the aluminum shell is dipped in a mixed solution consisting of chromic acid, phosphoric acid and hydrofluoric acid for 6-12min at 50-70 ℃.
6. The method for processing the high-temperature-resistant coated aluminum shell according to claim 1, wherein: and in the fifth step, cleaning with clear water at the temperature of 40-60 ℃.
7. The method for processing the high-temperature-resistant coated aluminum shell according to claim 1, wherein: in the sixth step, the water content after drying is less than 8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010313674.2A CN113529063A (en) | 2020-04-20 | 2020-04-20 | High-temperature-resistant coating aluminum shell treatment method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010313674.2A CN113529063A (en) | 2020-04-20 | 2020-04-20 | High-temperature-resistant coating aluminum shell treatment method |
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| CN113529063A true CN113529063A (en) | 2021-10-22 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87104237A (en) * | 1987-06-11 | 1988-03-02 | 杨彦昌 | A kind of aqueous oil-rust removing solution |
| CN101754666A (en) * | 2008-12-11 | 2010-06-23 | 住友轻金属工业株式会社 | Conductive precoating aluminum alloy plate |
| CN102453941A (en) * | 2010-10-18 | 2012-05-16 | 王振宇 | Green environmental protection surface treatment method for aluminum and aluminum alloy |
| CN104087943A (en) * | 2014-07-18 | 2014-10-08 | 梁胜光 | Efficient multifunctional metal oil-removal and rust-removal liquid |
| CN104404490A (en) * | 2014-11-05 | 2015-03-11 | 无锡鸿声铝业有限公司 | Oxidized aluminum processing method |
| TW201542878A (en) * | 2014-04-16 | 2015-11-16 | Kobe Steel Ltd | Precoated aluminum plate for capacitor case |
| WO2016106523A1 (en) * | 2014-12-29 | 2016-07-07 | 深圳市恒兆智科技有限公司 | Trivalent chromium/aluminum passivation treatment process and application thereof |
| CN109137049A (en) * | 2018-09-06 | 2019-01-04 | 广东耀银山铝业有限公司 | A kind of easy pole electrophoretic aluminium section production technology being passivated pre-treatment |
-
2020
- 2020-04-20 CN CN202010313674.2A patent/CN113529063A/en active Pending
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|---|---|---|---|---|
| CN87104237A (en) * | 1987-06-11 | 1988-03-02 | 杨彦昌 | A kind of aqueous oil-rust removing solution |
| CN101754666A (en) * | 2008-12-11 | 2010-06-23 | 住友轻金属工业株式会社 | Conductive precoating aluminum alloy plate |
| CN102453941A (en) * | 2010-10-18 | 2012-05-16 | 王振宇 | Green environmental protection surface treatment method for aluminum and aluminum alloy |
| TW201542878A (en) * | 2014-04-16 | 2015-11-16 | Kobe Steel Ltd | Precoated aluminum plate for capacitor case |
| CN104087943A (en) * | 2014-07-18 | 2014-10-08 | 梁胜光 | Efficient multifunctional metal oil-removal and rust-removal liquid |
| CN104404490A (en) * | 2014-11-05 | 2015-03-11 | 无锡鸿声铝业有限公司 | Oxidized aluminum processing method |
| WO2016106523A1 (en) * | 2014-12-29 | 2016-07-07 | 深圳市恒兆智科技有限公司 | Trivalent chromium/aluminum passivation treatment process and application thereof |
| CN109137049A (en) * | 2018-09-06 | 2019-01-04 | 广东耀银山铝业有限公司 | A kind of easy pole electrophoretic aluminium section production technology being passivated pre-treatment |
Non-Patent Citations (1)
| Title |
|---|
| 朱永明等: "铝和铝合金的化学转化膜", 《2000电子产品防护技术研讨会》, 1 April 2004 (2004-04-01), pages 79 - 82 * |
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