DE19824611A1 - Process for smoothing the surfaces of components made of aluminum and aluminum alloys - Google Patents
Process for smoothing the surfaces of components made of aluminum and aluminum alloysInfo
- Publication number
- DE19824611A1 DE19824611A1 DE19824611A DE19824611A DE19824611A1 DE 19824611 A1 DE19824611 A1 DE 19824611A1 DE 19824611 A DE19824611 A DE 19824611A DE 19824611 A DE19824611 A DE 19824611A DE 19824611 A1 DE19824611 A1 DE 19824611A1
- Authority
- DE
- Germany
- Prior art keywords
- aluminum
- smoothing
- hydration
- aluminum alloys
- components
- 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.)
- Withdrawn
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 12
- 238000000034 method Methods 0.000 title claims description 10
- 229910052782 aluminium Inorganic materials 0.000 title claims description 9
- 238000009499 grossing Methods 0.000 title claims description 8
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000036571 hydration Effects 0.000 claims description 9
- 238000006703 hydration reaction Methods 0.000 claims description 9
- 238000009835 boiling Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 abstract description 6
- 230000005684 electric field Effects 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 230000000887 hydrating effect Effects 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- -1 Polyethylene Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 230000003678 scratch resistant effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Classifications
-
- 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
- C23C22/68—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 solutions with pH between 6 and 8
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
- H02G5/063—Totally-enclosed installations, e.g. in metal casings filled with oil or gas
Landscapes
- 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)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Treatment Of Metals (AREA)
- Insulating Bodies (AREA)
Abstract
Description
Bei der Erfindung wird aus gegangen von einem Verfahren zur Glättung von Oberflächen von Bauelementen aus Aluminium und Aluminiumlegierungen nach dem Oberbegriff des Patentanspruchs 1.The invention is based on a method for Smoothing surfaces of components made of aluminum and Aluminum alloys according to the preamble of claim 1.
Mit dem Oberbegriff des Patentanspruchs 1 nimmt die Erfindung auf einen Stand der Technik Bezug, wie er aus der EP 0781860 A1 bekannt ist. Dort ist ein Verfahren zur Oberflächenbehandlung von Aluminium und Aluminiumlegierungen für mechanisch hochfeste Verbindungen angegeben, bei welchem die zu behandelnde Oberfläche zunächst durch Sandstrahlen aufgerauht, danach entfettet, bei 100°C 1 h lang vorgeheizt und danach während 4 h bei 100°C in deionisiertem Wasser hydratisiert wird. Dabei bildet sich eine semikristalline, metastabile Hydroxidschicht, sog. Pseudoböhmit, mit hoher Nanostabilität. Daran schließt sich eine 15stündige Wärmebehandlung bei 200°C an, gefolgt von einer 0,25-4stündigen Beschichtung mit einer metallorganischen Substanz bei 50°C. Die Dauer der Hydratisierung kann erheblich verkürzt werden, wenn zum Hydratisieren Wasser mit einem Zusatz von 0,1 M % Ammoniumhydroxid verwendet wird. Diese Veröffentlichung enthält keine Angaben darüber, welche Dielektrizitätskonstante ε die Hydroxidschicht aufweist. With the preamble of claim 1, the invention takes reference to a prior art, as it is from EP 0781860 A1 is known. There is a surface treatment process of aluminum and aluminum alloys for mechanically high strength Compounds specified in which the to be treated Surface roughened first by sandblasting, then degreased, preheated at 100 ° C for 1 h and then for 4 h is hydrated at 100 ° C in deionized water. Here a semi-crystalline, metastable hydroxide layer forms, so-called pseudoboehmite, with high nanostability. That follows a 15 hour heat treatment at 200 ° C followed by one 0.25-4 hour coating with an organometallic Substance at 50 ° C. The duration of hydration can be significant be shortened when hydrating water with an additive of 0.1 M% ammonium hydroxide is used. This Publication contains no information about which Dielectric constant ε has the hydroxide layer.
Aus der EP 0519228 B1 ist eine Hochspannungskapselung mit mindestens 2 Schutzbelegen bekannt, welche frei bewegliche Partikel festhalten und Oberflächenspitzen unwirksam machen sollen. Ein 1. Schutzbelag mit einer Dielektrizitätskonstante ε um 30 aus Epoxidharz enthält elektrisch leitende oder dielektrische Partikel; er dient zur Reduzierung der maximalen Feldstärke im Innenraum. Der darüberliegende, elektrisch isolierende 2. Schutzbelag aus Lack auf der Basis von Polyäthylen weist eine Dielektrizitätskonstante ε im Bereich von 1-2 auf; er ist vorzugsweise in einer Partikelfalle vorgesehen und dient zum Festhalten freier elektrisch leitender Partikel. Er kann als entfernbare Folie mit einer Dicke von 40 µm ausgebildet sein.A high-voltage encapsulation is known from EP 0519228 B1 at least 2 protective documents known, which are freely movable Hold on to particles and render surface tips ineffective should. A 1st protective covering with a dielectric constant ε around 30 made of epoxy resin contains electrically conductive or dielectric particles; it serves to reduce the maximum Field strength in the interior. The electric one above insulating 2nd protective covering made of lacquer based on Polyethylene has a dielectric constant ε in the range of 1-2 on; it is preferably provided in a particle trap and is used to hold free electrically conductive particles. It can be used as a removable film with a thickness of 40 µm be trained.
Die Erfindung, wie sie im Patentanspruch 1 definiert ist, löst die Aufgabe, ein Verfahren zur Glättung von Oberflächen von Bauelementen aus Aluminium und Aluminiumlegierungen der eingangs genannten Art derart weiterzuentwickeln, daß es kostengünstiger ausführbar wird.The invention as defined in claim 1 solves the task of a method for smoothing surfaces of Components made of aluminum and aluminum alloys of the beginning mentioned type to develop in such a way that it is cheaper becomes executable.
Vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen Patentansprüchen definiert.Advantageous embodiments of the invention are in the dependent claims defined.
Ein Vorteil der Erfindung besteht darin, daß sich zusätzliche Wärmebehandlungen und Lackierungen erübrigen. Das Verfahren ist einfach, umweltfreundlich, kostengünstig und universell auf Oberflächen von Aluminium und Aluminiumlegierungen anwendbar. Es führt zu einer deutlichen Verrundung vorhandener Spitzen und zur Auffüllung mikroskopischer Eintiefungen. Bedingt durch die hohe Dielektrizitätskonstante ε der abgeschiedenen Schicht wird eine Homogenisierung des oberflächennahen elektrischen Feldes von potentialführenden Bauteilen erreicht. Das Verfahren erzeugt gut haftende, kratzfeste und chemisch beständige Überzüge auf Aluminiumoberflächen.An advantage of the invention is that additional There is no need for heat treatments and painting. The procedure is simple, environmentally friendly, inexpensive and universal Surfaces of aluminum and aluminum alloys applicable. It leads to a clear rounding of existing peaks and to Filling microscopic recesses. Due to the high Dielectric constant ε of the deposited layer becomes one Homogenization of the near-surface electric field of potential-carrying components reached. The process produces well adhesive, scratch-resistant and chemically resistant coatings Aluminum surfaces.
Die Erfindung wird nachstehend anhand eines Ausführungsbeispiels erläutert. Es zeigen:The invention is described below using an exemplary embodiment explained. Show it:
Fig. 1 eine Aluminiumoberfläche vor einer Hydratisierung und Fig. 2 danach. Fig. 1 shows an aluminum surface before hydration and Fig. 2 after.
In den Figuren sind gleiche Teile mit gleichen Bezugszeichen gekennzeichnet.In the figures, the same parts have the same reference numerals featured.
Fig. 1 zeigt einen vergrößerten Ausschnitt einer sandgestrahlten Bauelementoberfläche (1) eines Aluminiumbauelementes, deren Spitzen eine Tiefe (t) im Bereich von 250 µm-500 µm aufweisen. Fig. 1 shows an enlarged detail of a sandblasted surface component (1) of an aluminum component, whose tips have a depth (t) have microns in the range of 250 microns-500.
Fig. 2 zeigt die Bauelementoberfläche (1) gemäß Fig. 1 nach einer 30minütigen Hydratisierung in kochendem Wasser. Während dieser Behandlung bildet sich auf der Bauelementoberfläche (1) eine stäbchenförmige Mikrostruktur aus Aluminiumhydroxid (2), die in ihrer makroskopischen Gesamtheit zu einer Nivellierung und Glättung der vorher bestehenden Oberflächen führt. Neben der vorteilhaften Verrundung der Oberflächen sollte die erwartete hohe Dielektrizitätskonstante ε der abgeschiedenen Schicht aus Aluminiumhydroxid (2) zu einer weiteren Homogenisierung des elektrischen Feldes im oberflächennahen Bereich führen. Dies wird mit einer Dielektrizitätskonstante ε im Bereich von 8-12, vorzugsweise von 10 erreicht. Die dafür erforderliche Dauer der Hydratisierung liegt im Bereich von 20 min-40 min, vorzugsweise im Bereich von 27 min-33 min, insbesondere bei 30 min. FIG. 2 shows the component surface ( 1 ) according to FIG. 1 after 30 minutes of hydration in boiling water. During this treatment, a rod-shaped microstructure of aluminum hydroxide (2), which results in their macroscopic entirety to a leveling and smoothing of the pre-existing surfaces formed on the component surface (1). In addition to the advantageous rounding of the surfaces, the expected high dielectric constant ε of the deposited layer of aluminum hydroxide ( 2 ) should lead to a further homogenization of the electric field in the area near the surface. This is achieved with a dielectric constant ε in the range from 8-12, preferably from 10. The hydration time required for this is in the range from 20 min-40 min, preferably in the range from 27 min-33 min, in particular 30 min.
11
Bauelementoberfläche
Component surface
22nd
Aluminiumhydroxidschicht auf Aluminum hydroxide layer
11
t Tiefe der Spitzen auf t depth of the tips
11
vor der Hydratisierung
before hydration
Claims (4)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19824611A DE19824611A1 (en) | 1998-06-02 | 1998-06-02 | Process for smoothing the surfaces of components made of aluminum and aluminum alloys |
| PCT/CH1999/000225 WO1999063634A1 (en) | 1998-06-02 | 1999-05-26 | High-tension conductor with a hydrophilic protective cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19824611A DE19824611A1 (en) | 1998-06-02 | 1998-06-02 | Process for smoothing the surfaces of components made of aluminum and aluminum alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE19824611A1 true DE19824611A1 (en) | 1999-12-09 |
Family
ID=7869665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19824611A Withdrawn DE19824611A1 (en) | 1998-06-02 | 1998-06-02 | Process for smoothing the surfaces of components made of aluminum and aluminum alloys |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE19824611A1 (en) |
| WO (1) | WO1999063634A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1571198A1 (en) * | 1964-10-08 | 1970-11-26 | Alusuisse | Process for applying layers of thermoplastics to aluminum surfaces |
| US4759805A (en) * | 1980-03-24 | 1988-07-26 | Fujikura Cable Works Ltd. | Aluminum conductor of low audible noise transmission |
| DE4139679A1 (en) * | 1991-12-02 | 1993-06-03 | Schueco Int Kg | Prodn. of protective coating on aluminium@ components - for construction industry, by natural oxidn. in strongly oxidising media, followed by anodic oxidn., obviating oil, grease application |
| DE4303339C2 (en) * | 1993-02-05 | 1995-03-30 | Ritter Aluminium Giesserei Gmb | Process for the treatment of aluminum die castings |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4463219A (en) * | 1980-05-16 | 1984-07-31 | Sumitomo Electric Industries, Ltd. | Compound cable |
| DE4120309A1 (en) * | 1991-06-20 | 1992-12-24 | Asea Brown Boveri | HIGH VOLTAGE SYSTEM |
| DE19705886A1 (en) * | 1997-02-15 | 1998-08-20 | Asea Brown Boveri | Compressed gas-insulated power supply conduit |
-
1998
- 1998-06-02 DE DE19824611A patent/DE19824611A1/en not_active Withdrawn
-
1999
- 1999-05-26 WO PCT/CH1999/000225 patent/WO1999063634A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1571198A1 (en) * | 1964-10-08 | 1970-11-26 | Alusuisse | Process for applying layers of thermoplastics to aluminum surfaces |
| US4759805A (en) * | 1980-03-24 | 1988-07-26 | Fujikura Cable Works Ltd. | Aluminum conductor of low audible noise transmission |
| DE4139679A1 (en) * | 1991-12-02 | 1993-06-03 | Schueco Int Kg | Prodn. of protective coating on aluminium@ components - for construction industry, by natural oxidn. in strongly oxidising media, followed by anodic oxidn., obviating oil, grease application |
| DE4303339C2 (en) * | 1993-02-05 | 1995-03-30 | Ritter Aluminium Giesserei Gmb | Process for the treatment of aluminum die castings |
Non-Patent Citations (3)
| Title |
|---|
| 06287768 A * |
| 07166369 A * |
| JP Patents Abstracts of Japan: 6-128753 A.,C-1236,Aug. 11,1994,Vol.18,No.430 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1999063634A1 (en) | 1999-12-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
| 8128 | New person/name/address of the agent |
Representative=s name: ZIMMERMANN & PARTNER, 80331 MUENCHEN |
|
| 8139 | Disposal/non-payment of the annual fee |