EP0066117A1 - Cleaning of surfaces of anodised aluminium and its alloys - Google Patents
Cleaning of surfaces of anodised aluminium and its alloys Download PDFInfo
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- EP0066117A1 EP0066117A1 EP82104011A EP82104011A EP0066117A1 EP 0066117 A1 EP0066117 A1 EP 0066117A1 EP 82104011 A EP82104011 A EP 82104011A EP 82104011 A EP82104011 A EP 82104011A EP 0066117 A1 EP0066117 A1 EP 0066117A1
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- 238000004140 cleaning Methods 0.000 title claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 239000000956 alloy Substances 0.000 title claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 6
- 239000004411 aluminium Substances 0.000 title 1
- 239000000243 solution Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 8
- ZJAOAACCNHFJAH-UHFFFAOYSA-N phosphonoformic acid Chemical compound OC(=O)P(O)(O)=O ZJAOAACCNHFJAH-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000002904 solvent Substances 0.000 claims abstract description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 5
- 230000000536 complexating effect Effects 0.000 claims abstract description 4
- 150000002148 esters Chemical class 0.000 claims abstract description 4
- 239000010409 thin film Substances 0.000 claims abstract description 4
- 229960005102 foscarnet Drugs 0.000 claims abstract description 3
- 239000003960 organic solvent Substances 0.000 claims abstract description 3
- 239000003929 acidic solution Substances 0.000 claims description 5
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 claims description 3
- 239000002736 nonionic surfactant Substances 0.000 claims description 3
- 239000003945 anionic surfactant Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 abstract description 10
- 239000000203 mixture Substances 0.000 abstract description 7
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract description 4
- 239000012459 cleaning agent Substances 0.000 abstract description 4
- 229910017604 nitric acid Inorganic materials 0.000 abstract description 4
- 239000004094 surface-active agent Substances 0.000 abstract description 2
- 125000000129 anionic group Chemical group 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 13
- 230000002378 acidificating effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- -1 aliphatic alcohols Chemical class 0.000 description 4
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000012085 test solution Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- SZHQPBJEOCHCKM-UHFFFAOYSA-N 2-phosphonobutane-1,2,4-tricarboxylic acid Chemical compound OC(=O)CCC(P(O)(O)=O)(C(O)=O)CC(O)=O SZHQPBJEOCHCKM-UHFFFAOYSA-N 0.000 description 1
- CVLHGLWXLDOELD-UHFFFAOYSA-N 4-(Propan-2-yl)benzenesulfonic acid Chemical compound CC(C)C1=CC=C(S(O)(=O)=O)C=C1 CVLHGLWXLDOELD-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 description 1
- 239000005662 Paraffin oil Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 239000010407 anodic oxide Substances 0.000 description 1
- 238000002048 anodisation reaction Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-N diphosphoric acid Chemical class OP(O)(=O)OP(O)(O)=O XPPKVPWEQAFLFU-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000003009 phosphonic acids Chemical class 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 229940079842 sodium cumenesulfonate Drugs 0.000 description 1
- QEKATQBVVAZOAY-UHFFFAOYSA-M sodium;4-propan-2-ylbenzenesulfonate Chemical compound [Na+].CC(C)C1=CC=C(S([O-])(=O)=O)C=C1 QEKATQBVVAZOAY-UHFFFAOYSA-M 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/02—Inorganic compounds
- C11D7/04—Water-soluble compounds
- C11D7/08—Acids
-
- 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
- C25D11/18—After-treatment, e.g. pore-sealing
Definitions
- the invention relates to an improved method for cleaning surfaces made of anodized aluminum and its alloys.
- Anodization forms thin layers of aluminum oxide on the surface, which are then compacted in the manufacturing process, usually by treatment with boiling water, so that the pores are closed.
- the aluminum surfaces treated in this way are very hard and largely protected against the weather.
- anodically oxidized aluminum surfaces are often used in practice due to their high protective effect and attractive appearance, especially when used outdoors.
- Large-area aluminum parts with an anodized surface are often used as facade cladding, for example.
- Neutral cleaning agents are recommended for cleaning anodically oxidized aluminum surfaces and their alloys, as alkaline cleaning agents easily attack the metal surface of the aluminum.
- abrasive-free neutral cleaners are often not sufficient, particularly in the construction industry, for cleaning heavily soiled metal facades made of aluminum or similar material. If neutral cleaners containing an abrasive component are used, the desired effect can be achieved, but these processes are quite time-consuming and costly.
- Short-chain phosphoric acid esters have also been proposed as an acidic, low-attack cleaning component. Without mechanical support, however, such agents only remove lightly adhering soiling.
- acidic cleaners for anodized aluminum surfaces are known from DE-AS 27 21 573. These agents consist of an acidic treatment solution in the pH range of 0.8 to 3 and contain complex fluorine compounds of boron, aluminum, silicon, titanium or zirconium, individually or as a mixture. A good cleaning effect is achieved, whereby after an exposure time of
- a 65 percent solution is expediently used as the nitric acid.
- the phosphoric acid partial esters used are mixtures of mono- and diphosphoric acid esters. Products of this type can be produced by reacting phosphoric acid with aliphatic alcohols having 1 to 3 carbon atoms.
- 1-hydroxyalkane-1,1-diphosphonic acids in particular, in particular in the form of 1-hydroxyethane-1,1-diphosphonic acid, and 1-aminoalkane-1,1-diphasphonic acid n or phosphonic acids containing carboxyl groups, such as 2- Phosphono-1,2,4-butane tricarboxylic acid or in particular nitrilotrimethylene phosphonic acid into consideration.
- Suitable surfactants are alkyl sulfonic acids with a chain length of C 8 to C 18 and / or alkylbenzenesulfonic acid with 8 to 15 C atoms in the alkyl radical and / or nonionic surfactants, such as adducts of 8 to 15 moles of ethylene oxide with alkylphenols, the alkyl radical of which has 8 to 12 C atoms contains as well as fatty alcohols with 8 to 18 carbon atoms.
- Suitable solubilizers and / or solvents are aliphatic alcohols, such as ethyl, propyl, isopropyl or n-butyl alcohols.
- the cleaning solutions described above are applied to the anodized surface in a thin film at ambient temperature. This can be done, for example, by spraying, but expediently by brushing, rolling or by hand wiping. After the solution has had sufficient time to act, it is then rinsed off with water.
- a major advantage of the procedure described above is that the solution can remain on the surface for a relatively long time without any noticeable attack on the aluminum oxide layer.
- a uniform and very dirty looking anodized façade was divided into three test fields, each measuring 50 x 50 cm.
- the middle test area was cleaned as well as possible with the abrasive cleaner.
- Two acidic cleaners were tested against this standard. The cleaners were applied undiluted to the test field evenly without pressure using a washer saturated with the test solution, so that a homogeneous, thin cleaning film remained. After an exposure time of 2 minutes, it was washed with plenty of water using a lambskin wiper and the remaining moisture was scraped off.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Detergent Compositions (AREA)
- Lubricants (AREA)
Abstract
Description
Gegenstand der Erfindung ist ein verbessertes Verfahren zur Reinigung von Oberflächen aus anodisch oxidiertem Aluminium und dessen Legierungen.The invention relates to an improved method for cleaning surfaces made of anodized aluminum and its alloys.
Durch eine Anodisierung werden dünne Schichten aus Aluminiumoxid-auf der Oberfläche ausgebildet, die im Herstellungsprozeß dann, meistens durch Behandlung mit siedendem Wasser, verdichtet werden, so daß die Poren verschlossen sind. Die so behandelten Aluminiumoberflächen sind sehr hart und gegen Witterungseinflüsse weitgehend geschützt.Anodization forms thin layers of aluminum oxide on the surface, which are then compacted in the manufacturing process, usually by treatment with boiling water, so that the pores are closed. The aluminum surfaces treated in this way are very hard and largely protected against the weather.
Daher gelangen in der Praxis anodisch oxidierte Aluminiumoberflächen wegen der hohen Schutzwirkung und des attraktiven Aussehens, insbesondere bei Außenanwendung, häufig zum Einsatz. Großflächige Aluminiumteile mit anodisch oxidierter Oberfläche werden beispielsweise oft als Fassadenverkleidung verwendet.For this reason, anodically oxidized aluminum surfaces are often used in practice due to their high protective effect and attractive appearance, especially when used outdoors. Large-area aluminum parts with an anodized surface are often used as facade cladding, for example.
Zur Reinigung von anodisch oxidierten Aluminiumoberflächen und dessen Legierungen werden neutrale Reinigungsmittel empfohlen, da alkalisch wirkende Reiniger leicht die Metalloberfläche des Aluminiums angreifen.Neutral cleaning agents are recommended for cleaning anodically oxidized aluminum surfaces and their alloys, as alkaline cleaning agents easily attack the metal surface of the aluminum.
Die Reinigungswirkung schleifmittelfreier neutraler Reiniger ist insbesondere im Bauwesen zur Reinigung stark verschmutzter Metallfassaden aus Aluminium oder ähnlichem Material häufig nicht ausreichend. Verwendet man neutrale Reiniger, die eine abrasive Komponente enthalten, so kann zwar der gewünschte Effekt erzielt werden, jedoch sind diese Verfahren recht zeitraubend und kostenaufwendig.The cleaning effect of abrasive-free neutral cleaners is often not sufficient, particularly in the construction industry, for cleaning heavily soiled metal facades made of aluminum or similar material. If neutral cleaners containing an abrasive component are used, the desired effect can be achieved, but these processes are quite time-consuming and costly.
Als saure, wenig angreifende Reinigungskomponente wurden auch schon kurzkettige Phosphorsäureester vorgeschlagen. Ohne mechanische Unterstützung entfernen aber auch derartige Mittel nur leicht anhaftende Verschmutzungen.Short-chain phosphoric acid esters have also been proposed as an acidic, low-attack cleaning component. Without mechanical support, however, such agents only remove lightly adhering soiling.
Schließlich sind saure Reiniger für anodisch oxidierte Aluminiumoberflächen aus der DE-AS 27 21 573 bekannt. Diese Mittel bestehen aus einer sauren Behandlungslösung im pH-Bereich von 0,8 bis 3 und enthalten komplexe Fluorverbindungen des Bors, Aluminiums, Siliziums, Titans oder Zirkoniums einzeln oder im Gemisch. Es wird eine gute Reinigungswirkung erzielt, wobei nach einer Einwirkungszeit vonFinally, acidic cleaners for anodized aluminum surfaces are known from DE-AS 27 21 573. These agents consist of an acidic treatment solution in the pH range of 0.8 to 3 and contain complex fluorine compounds of boron, aluminum, silicon, titanium or zirconium, individually or as a mixture. A good cleaning effect is achieved, whereby after an exposure time of
bis zu 5 Minuten kein meßbarer Angriff auf die Oxidschicht eintritt.no measurable attack on the oxide layer occurs for up to 5 minutes.
Bei der Fassadenreinigung können jedoch erheblich längere Verweilzeiten des Reinigers, insbesondere an weniger zugänglichen Fassadenelementen, nicht ausgeschlossen werden. Für die Praxis wäre es daher von erheblichem Vorteil, wenn ein Reinigungsverfahren angewandt werden kann, das mit geringerem Aufwand als bei der abrasiven Reinigung die Entfernung auch stärkerer Verschmutzungen von Metallfassaden gestattet, ohne daß das Fassadenmaterial bei längerem Kontakt mit dem Reiniger angegriffen wird.When cleaning facades, however, considerably longer dwell times of the cleaner, especially on less accessible facade elements, cannot be ruled out. In practice, it would therefore be of considerable advantage if a cleaning process can be used which is less expensive than that of abrasive cleaning allows the removal of even heavier soiling from metal facades without the facade material being attacked by prolonged contact with the cleaner.
Gegenstand der Erfindung ist ein Verfahren zur Reinigung von anodisch oxidierten Aluminiumoberflächen und dessen Legierungen mittels wäßriger saurer Lösungen, die bei Umgebungstemperatur als dünner Film aufgetragen und nach hinreichender Einwirkung mit Wasser wieder abgespült werden, dadurch gekennzeichnet, daß man die Behandlung mit sauren Lösungen (pH-Bereich kleiner als 2) durchführt, die
- a. 5 bis 20 Gewichtsprozent HNO3 (berechnet als 65 %ige Lösung)
- b. 0,2 bis 10 Gewichtsprozent Phosphorsäurepartialester
- c. 0,5 bis 20 Gewichtsprozent komplexierend-wirkende Phosphonsäure.oder.Phosphonocarbonsäure
- d. 1 bis 20 Gewichtsprozent nichtionische und/oder anionische Tenside
- e. 0 bis 30 Gewichtsprozent Lösungsvermittler und/ oder organische Lösungsmittel sowie
- f.40 bis 90 Gewichtsprozent Wasser. enthalten.
- a. 5 to 20 percent by weight HNO 3 (calculated as a 65% solution)
- b. 0.2 to 10 percent by weight phosphoric acid partial ester
- c. 0.5 to 20 percent by weight complexing phosphonic acid or phosphonocarboxylic acid
- d. 1 to 20 percent by weight of nonionic and / or anionic surfactants
- e. 0 to 30 weight percent solubilizers and / or organic solvents as well
- f .40 to 90 weight percent water. contain.
Als Salpetersäure wird zweckmäßigerweise eine 65 prozentige Lösung verwendet. Bei den zur Anwendung gelangenden Phosphorsäurepartialestern handelt es sich um Gemische aus Mono- und Diphosphorsäureester. Derartige Produkte können durch Umsetzung von Phosphorsäure mit aliphatischen Alkoholen mit 1 bis 3 C-Atomen hergestellt werden.A 65 percent solution is expediently used as the nitric acid. The phosphoric acid partial esters used are mixtures of mono- and diphosphoric acid esters. Products of this type can be produced by reacting phosphoric acid with aliphatic alcohols having 1 to 3 carbon atoms.
Es sind in letzter Zeit zahlreiche Phosphonsäuren be- schrieben worden, die komplexierend wirkende Eigenschaften aufweisen. Für die vorliegenden Zwecke kommen insbesondere 1-Hydroxyalkan-1,1-diphosphonsäuren,insbesondere in Form der 1-Hydroxyethan-1,1-diphosphonsäure,sowie 1-Aminoalkan-1,1-diphasphonsäuren oder auch Carboxylgruppen enthaltende Phosphonsäuren, wie 2-Phosphono-1,2,4-butantricarbonsäure oder auch insbesondere Nitrilotrimethylenphosphonsäure in Betracht.There are numerous phosphonic be lately - been written, which have complexing properties acting. For the present purposes, 1-hydroxyalkane-1,1-diphosphonic acids in particular, in particular in the form of 1-hydroxyethane-1,1-diphosphonic acid, and 1-aminoalkane-1,1-diphasphonic acid n or phosphonic acids containing carboxyl groups, such as 2- Phosphono-1,2,4-butane tricarboxylic acid or in particular nitrilotrimethylene phosphonic acid into consideration.
Als Tenside kommen Alkylsulfonsäuren der Kettenlänge C8 bis C18 und/oder Alkylbenzolsulfonsäure mit 8 bis 15 C-Atomen im Alkylrest und/oder nichtionische Tenside, wie Anlagerungsprodukte von 8 bis 15-Mol Ethylenoxid an Alkylphenole, deren Alkylrest 8 bis 12 C-Atome enthält sowie an Fettalkohole mit 8 bis 18 C-Atomen in Betracht.Suitable surfactants are alkyl sulfonic acids with a chain length of C 8 to C 18 and / or alkylbenzenesulfonic acid with 8 to 15 C atoms in the alkyl radical and / or nonionic surfactants, such as adducts of 8 to 15 moles of ethylene oxide with alkylphenols, the alkyl radical of which has 8 to 12 C atoms contains as well as fatty alcohols with 8 to 18 carbon atoms.
Als Lösungsvermittler und/oder Lösungsmittel sind geeignet aliphatische Alkohole, wie Ethyl-, Propyl-, Isopropyl- oder n-Butylalkohole.Suitable solubilizers and / or solvents are aliphatic alcohols, such as ethyl, propyl, isopropyl or n-butyl alcohols.
Weiterhin finden als Lösungsvermittler bekannte Verbindungen, wie Natriumcumolsulfonat beziehungsweise Cumolsulfonsäure Anwendung.Known compounds such as sodium cumene sulfonate or cumene sulfonic acid are also used as solubilizers.
In manchen Fällen hat es sich als vorteilhaft erwiesen, den sauren Lösungen noch Paraffinöl oder Siliconöle als pflegende Komponente in geringen Mengen hinzuzufügen. Die beschriebenen Mittel werden in relativ konzentrierten Lösungen angewendet. Der Wassergehalt beträgt 40 bis 90, vorzugsweise 49 bis 80 Gewichtsprozent.In some cases it has proven advantageous to add small amounts of paraffin oil or silicone oils as a caring component to the acidic solutions. The agents described are used in relatively concentrated solutions. The water content is 40 to 90 , preferably 49 to 80 percent by weight.
Die oben beschriebenen Reinigungslösungen werden bei Umgebungstemperatur auf die anodisierte Oberfläche in dünnem Film aufgetragen. Dies kann beispielsweise durch Aufsprühen, zweckmäßigerweise aber durch Bürsten, Aufwalzen oder im Handwischverfahren, geschehen. Nach hinreichender Einwirkungszeit der Lösung wird diese dann mit Wasser abgespült. Ein wesentlicher Vorteil der oben beschriebenen Arbeitsweise besteht darin, daß die Lösung längere Zeit auf der Oberfläche verbleiben kann, ohne daß ein merklicher Angriff auf die Aluminiumoxidschicht erfolgt.The cleaning solutions described above are applied to the anodized surface in a thin film at ambient temperature. This can be done, for example, by spraying, but expediently by brushing, rolling or by hand wiping. After the solution has had sufficient time to act, it is then rinsed off with water. A major advantage of the procedure described above is that the solution can remain on the surface for a relatively long time without any noticeable attack on the aluminum oxide layer.
Es wurden 16 x 8 cm große,nach üblichen Verfahren anodisch oxidierte hellbronzene Aluminiumprüfbleche verwendet. Die Schichtdicke, die in der nachstehenden Tabelle 2 angegeben ist, lag zwischen 17 und 23 µm,Die Aluminiumbleche wurden bei 20°C für 20 Stunden zur Hälfte in die konzentrierten Testlösungen getaucht.Die Testlösungen (A-G) hatten die aus der Tabelle 1 ersichtliche Zusammensetzung. Danach wurden die Bleche mit Wasser abgewaschen und auf eventuelle Farbänderungen untersucht. Es wurde auch die Dicke der anodischen Oxidschicht sowie der Scheinleitwert Y und der dielektrische Verlustfaktor d der Testfläche im Vergleich zur unbehandelten Hälfte des Prüfbleches gemessen. Als Vergleichstestlösung (H) wurde dabei auch ein saurer Reiniger verwendet, der die nachstehende Zusammensetzung hatte:
Die Ergebnisse sind in Tabelle 2 enthalten.
In einem Praxistest, der unter standardisierten Bedingungen durchgeführt wurde, wurde die reinigende Wirkung der Testprodukte A bis G gemäß Tabelle 1 im Vergleich zu einem abrasiven Reiniger der folgenden Rezeptur überprüft:In a practical test, which was carried out under standardized conditions, the cleaning effect of test products A to G according to Table 1 was checked in comparison to an abrasive cleaner of the following formulation:
Die Reinigungswirkung der beiden Testprodukte wurde jeweils im Vergleich zum Standard von drei unabhängig voneinander urteilenden Prüfern nach folgendem Schema bewertet:
Die Tests würden an zwei weiteren Fassaden, die anders getönt waren, wiederholt. Die maximal erreichbare Punktzahl betrug somit 9 Punkte. Ab 6 Punkten wurde das Testprodukt in der Gesamtbeurteilung besser als der Standard eingestuft, bei 4 - 5,5 Punkten wurde es gleich, unter 4 Punkten schlechter als der Standard eingestuft.The tests were repeated on two other facades that were tinted differently. The maximum possible score was 9 points. From 6 points the test product was rated better than the standard in the overall assessment, with 4 - 5.5 points it was rated the same, below 4 points worse than the standard.
Die Ergebnisse sind aus Tabelle 3 ersichtlich.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT82104011T ATE8512T1 (en) | 1981-05-16 | 1982-05-08 | CLEANING OF SURFACES MADE OF ANODISED ALUMINUM AND ITS ALLOYS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3119538 | 1981-05-16 | ||
DE19813119538 DE3119538A1 (en) | 1981-05-16 | 1981-05-16 | CLEANING OF SURFACES FROM ANODIZED ALUMINUM AND ITS ALLOYS |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0066117A1 true EP0066117A1 (en) | 1982-12-08 |
EP0066117B1 EP0066117B1 (en) | 1984-07-18 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82104011A Expired EP0066117B1 (en) | 1981-05-16 | 1982-05-08 | Cleaning of surfaces of anodised aluminium and its alloys |
Country Status (5)
Country | Link |
---|---|
US (1) | US4404039A (en) |
EP (1) | EP0066117B1 (en) |
AT (1) | ATE8512T1 (en) |
CA (1) | CA1177372A (en) |
DE (2) | DE3119538A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4789406A (en) * | 1986-08-20 | 1988-12-06 | Betz Laboratories, Inc. | Method and compositions for penetrating and removing accumulated corrosion products and deposits from metal surfaces |
CA2248568A1 (en) * | 1997-01-09 | 1998-07-16 | Scott J. Beleck | Acid deoxidizing/etching composition and process suitable for vertical aluminum surfaces |
FR2827610B1 (en) * | 2001-07-17 | 2005-09-02 | Commissariat Energie Atomique | DEGREASING COMPOSITION USEFUL FOR DEGREASING AND / OR DECONTAMINATING SOLID SURFACES |
DE102013226533A1 (en) * | 2013-12-18 | 2015-06-18 | MAHLE Behr GmbH & Co. KG | Cleaner for an aluminum component and a process for cleaning aluminum components |
DE102017109739A1 (en) * | 2017-05-05 | 2018-11-08 | Fischer Oberflächentechnik GmbH | Aqueous solution and method for removing acid residues from metal surfaces |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3004879A (en) * | 1958-11-03 | 1961-10-17 | Dow Chemical Co | Brightening and cleaning composition and treatment for magnesium and magnesium-base alloys |
DE2436278A1 (en) * | 1974-07-27 | 1976-02-12 | Robert Malcolm Farley | Cleaning and protecting light metal surfaces - with mixt. of paraffin oil and solvents for synthetic resins |
DE2721573B1 (en) * | 1977-05-13 | 1978-08-10 | Metallgesellschaft Ag | Process for cleaning anodic oxide layers on aluminum or its alloys in construction |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1243424A (en) * | 1969-02-17 | 1971-08-18 | Pyrene Co Ltd | Cleaning and brightening of aluminium surfaces |
US3663327A (en) * | 1969-08-13 | 1972-05-16 | Chemed Corp | Formulation and method for brightening aluminum |
US3738937A (en) * | 1970-05-08 | 1973-06-12 | Textilana Corp | Polyalkylene polyamino polykis methylene phosphonic acids and salts thereof and methods for producing same |
US3932243A (en) * | 1973-07-20 | 1976-01-13 | Fremont Industries, Inc. | Cleaning and polishing compound for barrel and vibratory finishing of ferrous and non-ferrous metals |
AT337301B (en) | 1975-05-20 | 1977-06-27 | Oswald Ing Hans | ELECTRIC MACHINE WITH UBER MECHANICAL SWITCHES PULSE-FEED COILS OF STANDING WINDING |
US4169068A (en) * | 1976-08-20 | 1979-09-25 | Japan Synthetic Rubber Company Limited | Stripping liquor composition for removing photoresists comprising hydrogen peroxide |
-
1981
- 1981-05-16 DE DE19813119538 patent/DE3119538A1/en not_active Withdrawn
-
1982
- 1982-04-29 US US06/373,295 patent/US4404039A/en not_active Expired - Fee Related
- 1982-05-05 CA CA000402310A patent/CA1177372A/en not_active Expired
- 1982-05-08 DE DE8282104011T patent/DE3260401D1/en not_active Expired
- 1982-05-08 EP EP82104011A patent/EP0066117B1/en not_active Expired
- 1982-05-08 AT AT82104011T patent/ATE8512T1/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3004879A (en) * | 1958-11-03 | 1961-10-17 | Dow Chemical Co | Brightening and cleaning composition and treatment for magnesium and magnesium-base alloys |
DE2436278A1 (en) * | 1974-07-27 | 1976-02-12 | Robert Malcolm Farley | Cleaning and protecting light metal surfaces - with mixt. of paraffin oil and solvents for synthetic resins |
DE2721573B1 (en) * | 1977-05-13 | 1978-08-10 | Metallgesellschaft Ag | Process for cleaning anodic oxide layers on aluminum or its alloys in construction |
Non-Patent Citations (1)
Title |
---|
CHEMICAL ABSTRACTS, Band 88, Nr. 24, 12. Juni 1978, Seite 310, Nr. 175223u, Columbus Ohio (USA); * |
Also Published As
Publication number | Publication date |
---|---|
DE3260401D1 (en) | 1984-08-23 |
US4404039A (en) | 1983-09-13 |
CA1177372A (en) | 1984-11-06 |
ATE8512T1 (en) | 1984-08-15 |
DE3119538A1 (en) | 1982-12-02 |
EP0066117B1 (en) | 1984-07-18 |
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