EP0636710B1 - Method for cleaning articles - Google Patents
Method for cleaning articles Download PDFInfo
- Publication number
- EP0636710B1 EP0636710B1 EP94109602A EP94109602A EP0636710B1 EP 0636710 B1 EP0636710 B1 EP 0636710B1 EP 94109602 A EP94109602 A EP 94109602A EP 94109602 A EP94109602 A EP 94109602A EP 0636710 B1 EP0636710 B1 EP 0636710B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- propylene glycol
- formula
- weight
- percent
- iso
- 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.)
- Expired - Lifetime
Links
- 238000004140 cleaning Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 title claims description 8
- 239000000203 mixture Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000005260 corrosion Methods 0.000 claims abstract description 8
- 230000007797 corrosion Effects 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- JDSQBDGCMUXRBM-UHFFFAOYSA-N 2-[2-(2-butoxypropoxy)propoxy]propan-1-ol Chemical compound CCCCOC(C)COC(C)COC(C)CO JDSQBDGCMUXRBM-UHFFFAOYSA-N 0.000 claims abstract description 4
- JOLQKTGDSGKSKJ-UHFFFAOYSA-N 1-ethoxypropan-2-ol Chemical class CCOCC(C)O JOLQKTGDSGKSKJ-UHFFFAOYSA-N 0.000 claims description 8
- RWNUSVWFHDHRCJ-UHFFFAOYSA-N 1-butoxypropan-2-ol Chemical compound CCCCOCC(C)O RWNUSVWFHDHRCJ-UHFFFAOYSA-N 0.000 claims description 5
- -1 glycol ethers Chemical class 0.000 claims 5
- HNUALPPJLMYHDK-UHFFFAOYSA-N C[CH]C Chemical compound C[CH]C HNUALPPJLMYHDK-UHFFFAOYSA-N 0.000 claims 4
- OCBFFGCSTGGPSQ-UHFFFAOYSA-N [CH2]CC Chemical compound [CH2]CC OCBFFGCSTGGPSQ-UHFFFAOYSA-N 0.000 claims 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N monopropylene glycol Natural products CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims 3
- WPWHSFAFEBZWBB-UHFFFAOYSA-N 1-butyl radical Chemical compound [CH2]CCC WPWHSFAFEBZWBB-UHFFFAOYSA-N 0.000 claims 2
- KTOQRRDVVIDEAA-UHFFFAOYSA-N 2-methylpropane Chemical compound [CH2]C(C)C KTOQRRDVVIDEAA-UHFFFAOYSA-N 0.000 claims 2
- 239000000654 additive Substances 0.000 claims 2
- 230000000996 additive effect Effects 0.000 claims 2
- QUPDWYMUPZLYJZ-UHFFFAOYSA-N ethyl Chemical compound C[CH2] QUPDWYMUPZLYJZ-UHFFFAOYSA-N 0.000 claims 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims 2
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 abstract description 6
- 238000001035 drying Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 238000002604 ultrasonography 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/173—Macromolecular compounds
-
- 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
Definitions
- the present invention relates to a method for cleaning objects according to the preamble of claim 1.
- Objects to be cleaned are subjected to a cleaning process in a cleaning bath by immersion, optionally with ultrasound assistance, and are then freed from the cleaning bath in a first aqueous rinsing bath. Because of the impurities introduced into the first rinsing bath, a second rinsing bath is recommended for perfect rinsing, which is followed by a drying process.
- This corrosion proves to be particularly problematic when the dried objects are to be processed further, for example by providing a coating.
- the problem underlying the present invention is to reduce the risk of corrosion.
- the object is achieved by a method according to claim 1.
- an addition of a mixture of propylene glycol methyl ether and propylene glycol ether is added to the last rinsing bath.
- a glycol ether mixture improves the outflow behavior of the water from the objects removed from the water, and the water flows out like a curtain.
- a film-like coating is evidently formed, which offers effective protection against oxidation and corresponding corrosion for a limited period of about 24 hours.
- the last rinsing bath consists of deionized water (deionized water) to prevent staining.
- deionized water deionized water
- glycol ether mixture mentioned is added to the deionized water in a concentration of about 10 percent by weight to 50 percent by weight.
- a propylene glycol monoethyl ether of the formula has proven to be particularly suitable as propylene glycol methyl ether and as propylene glycol ether a propylene glycol n-butyl ether of the formula proven.
- Metal parts to be cleaned made of steel are treated in a glycol ether cleaning bath and then cleaned of the residues of the cleaning bath in a first aqueous bath.
- the parts are rinsed in a second bath from demineralized water and then dried in a hot air stream.
- the drying time is about three minutes, it is strongly dependent on the temperature of the warm air flow and the air speed.
- the same metal parts as in Example 1 are treated in the same cleaning bath and the residues are also cleaned in the first rinsing bath.
- the second rinsing bath is a mixture of propylene glycol monoethyl ether of the formula and propylene glycol n-butyl ether of the formula in proportions of 80% by weight of propylene glycol monoethyl ether and 20% by weight of propylene glycol n-butyl ether.
- the drying time could be reduced by 50% by draining the rinsing bath from the items removed after rinsing. Even after 24 hours, even with careful inspection, there was still no corrosion, within this time the dried parts could be processed without further protective measures, e.g. be coated.
Landscapes
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Detergent Compositions (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Die vorliegende Erfindung bezieht sich auf ein Verfahren zum Reinigen von Gegenständen gemäß Oberbegriff des Anspruchs 1.The present invention relates to a method for cleaning objects according to the preamble of claim 1.
Ein gattungsgemäßes Verfahren ist bekannt aus der nicht vorveröffentlichten deutschen Patentanmeldung P 43 09 096 (vgl. auch EP-A-0 608 700).A generic method is known from the unpublished German patent application P 43 09 096 (cf. also EP-A-0 608 700).
Zu reinigende Gegenstände, im vorliegenden Falle insbesondere solche aus Stahl, werden in einem Reinigungsbad durch Eintauchen, gegebenenfalls mit Ultraschallunterstützung, einem Reinigungsvorgang unterzogen, und anschließend in einem ersten wäßrigen Spülbad vom Reinigungsbad befreit. Wegen der in das erste Spülbad eingeschleppten Verunreinigungen ist zur einwandfreien Spülung ein zweites Spülbad empfehlenswert, an das sich ein Trocknungsvorgang anschließt.Objects to be cleaned, especially those made of steel in the present case, are subjected to a cleaning process in a cleaning bath by immersion, optionally with ultrasound assistance, and are then freed from the cleaning bath in a first aqueous rinsing bath. Because of the impurities introduced into the first rinsing bath, a second rinsing bath is recommended for perfect rinsing, which is followed by a drying process.
Insbesondere bei Stahlgegenständen, aber auch bei anderen Metallen wie z.B. Aluminium besteht aufgrund der Wasserreste auf dem Material während des Trocknungsvorganges die Gefahr eines Anfluges von Korrosion.Especially with steel objects, but also with other metals such as Due to the water residues on the material during the drying process, aluminum is at risk of corrosion.
Diese Korrosion erweist sich insbesondere dann als problematisch, wenn die getrockneten Gegenstände weiterverarbeitet werden sollen, beispielsweise indem eine Beschichtung vorgesehen werden soll.This corrosion proves to be particularly problematic when the dried objects are to be processed further, for example by providing a coating.
Der vorliegenden Erfindung liegt das Problem zugrunde, das Risiko einer Korrosion herabzusetzen.The problem underlying the present invention is to reduce the risk of corrosion.
Die Aufgabe wird gelöst durch ein Verfahren gemäß Anspruch 1.The object is achieved by a method according to claim 1.
Erfindungsgemäß ist vorgesehen, dem letzten Spülbad einen Zusatz eines Gemisches aus Propylenglykolmethylether und Propylenglykolether hinzuzugeben. Überraschenderweise hat sich erwiesen, daß unter einem Zusatz eines derartigen Glycoläthergemisches dieser angegebenen Zusammensetzung das Abfließverhalten des Wassers von den aus dem Wasser entnommenen Gegenständen erheblich verbessert, das Wasser fließt vorhangartig ab. Zugleich bildet sich offensichtlich ein filmartiger Überzug, der für einen begrenzten Zeitraum von etwa 24 Stunden einen wirksamen Schutz gegen Oxidation und dementsprechende Korrosion bietet.According to the invention, an addition of a mixture of propylene glycol methyl ether and propylene glycol ether is added to the last rinsing bath. Surprisingly, it has been found that the addition of such a glycol ether mixture to this composition improves the outflow behavior of the water from the objects removed from the water, and the water flows out like a curtain. At the same time, a film-like coating is evidently formed, which offers effective protection against oxidation and corresponding corrosion for a limited period of about 24 hours.
Das letzte Spülbad besteht, um Fleckenbildung zu verhindern, aus voll entsalztem Wasser (VE-Wasser). Das erwähnte Glykoläthergemisch wird in einer Konzentration von etwa 10 Gewichtsprozent bis 50 Gewichtsprozent dem VE-Wasser zugesetzt.The last rinsing bath consists of deionized water (deionized water) to prevent staining. The glycol ether mixture mentioned is added to the deionized water in a concentration of about 10 percent by weight to 50 percent by weight.
Als besonders geeignet haben sich als Propylenglykolmethylether ein Propylenglykolmonoethylether der Formel
Zu reinigende Metallteile aus Stahl werden in einem Reinigungsbad aus Glykoläthern behandelt und anschließend in einem ersten wäßrigen Bad von den Rückständen des Reinigungsbades gesäubert. Um eine vollständige Entfernung der Reinigungsbadrückstände, auch der, die in das erste Spülbad verschleppt wurden, zu erzielen, werden die Teile in einem zweiten Bad aus voll entsalztem Wasser gespült und anschließend in einem Warmluftstrom getrocknet. Die Trocknungszeit beträgt etwa drei Minuten, sie ist stark von der Temperatur des Warmluftstromes und der Luftgeschwindigkeit abhängig.Metal parts to be cleaned made of steel are treated in a glycol ether cleaning bath and then cleaned of the residues of the cleaning bath in a first aqueous bath. In order to achieve complete removal of the cleaning bath residues, including those that were carried over into the first rinsing bath, the parts are rinsed in a second bath from demineralized water and then dried in a hot air stream. The drying time is about three minutes, it is strongly dependent on the temperature of the warm air flow and the air speed.
Bereits unmittelbar nach der Trocknung ist mit bloßem Auge ein Anflug von Rost erkennbar.A hint of rust can be seen with the naked eye immediately after drying.
Die gleichen Metallteile wie in Beispiel 1 werden in dem gleichen Reinigungsbad behandelt und ebenfalls im ersten Spülbad von den Rückständen gesäubert. Dem zweiten Spülbad jedoch ist ein Gemisch von Propylenglykolmonoethylether der Formel
Durch ein vorhangartiges Ablaufen des Spülbades von den nach dem Spülen entnommenen Gegenständen konnte die Trocknungszeit um 50 % reduziert werden. Auch nach 24 Stunden zeigte sich auch bei sorgfältiger Prüfung immer noch kein Korrosionsanflug, innerhalb dieser Zeit konnten somit die getrockneten Teile ohne weitere Schutzmaßnahmen weiterverarbeitet, z.B. beschichtet werden.The drying time could be reduced by 50% by draining the rinsing bath from the items removed after rinsing. Even after 24 hours, even with careful inspection, there was still no corrosion, within this time the dried parts could be processed without further protective measures, e.g. be coated.
Claims (5)
- A method of cleaning objects, particularly metal objects, wherein the objects are first subjected to a cleaning bath and are subsequently subjected to at least one aqueous rinsing bath,
characterised in that an addition of 10 to 50 percent by weight of glycol ethers, of the following composition, is made to the last rinsing bath:
60 - 90 percent by weight of propylene glycol ethyl ethers of formula
and 30 to 10 percent by weight of propylene glycol ethers of formula - A method according to claim 1, characterised in that a propylene glycol monoethyl ether of formula
- A method according to claim 1 or 2, characterised in that a propylene glycol n-butyl ether of formula
- The use of a mixture of glycol ethers of composition
60 - 90 percent by weight of propylene glycol ethyl ethers of formula
and 40 to 10 percent by weight of propylene glycol ethers of formula
as an additive to an aqueous rinsing bath to improve the run-off behaviour of the water and to obtain intermediate corrosion protection. - The use of a mixture of glycol ethers of composition
60 - 90 percent by weight of propylene glycol monoethyl ether of formula
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4325133 | 1993-07-27 | ||
| DE4325133A DE4325133A1 (en) | 1993-07-27 | 1993-07-27 | Process for cleaning objects |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0636710A1 EP0636710A1 (en) | 1995-02-01 |
| EP0636710B1 true EP0636710B1 (en) | 1996-11-13 |
Family
ID=6493798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94109602A Expired - Lifetime EP0636710B1 (en) | 1993-07-27 | 1994-06-22 | Method for cleaning articles |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5626818A (en) |
| EP (1) | EP0636710B1 (en) |
| JP (1) | JPH07171521A (en) |
| AT (1) | ATE145254T1 (en) |
| CA (1) | CA2128846A1 (en) |
| DE (2) | DE4325133A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100419124C (en) * | 2005-02-07 | 2008-09-17 | 长江大学 | Inhibitor for controlling electric dipole corrosion |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3256630B2 (en) * | 1994-06-24 | 2002-02-12 | 株式会社トクヤマ | Cleaning method |
| US6125395A (en) * | 1999-10-04 | 2000-09-26 | Piiq.Com, Inc. | Method for identifying collections of internet web sites with domain names |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1546075A1 (en) * | 1965-04-05 | 1970-02-05 | Atterby Per Albin | Process for cleaning and corrosion protection of metals together with suitable composite agents |
| US3882038A (en) * | 1968-06-07 | 1975-05-06 | Union Carbide Corp | Cleaner compositions |
| US3939090A (en) * | 1973-10-23 | 1976-02-17 | Colgate-Palmolive Company | Antifogging cleaner |
| DE3232915A1 (en) * | 1982-09-04 | 1984-03-08 | Bayer Ag, 5090 Leverkusen | Process for eliminating oils and fats from bulk goods |
| DE3247756A1 (en) * | 1982-12-23 | 1984-06-28 | Herberts Gmbh, 5600 Wuppertal | AQUEOUS COATING AGENT |
| US4485131A (en) * | 1983-03-04 | 1984-11-27 | Pennwalt Corporation | Alkaline aqueous coating solution and process |
| JPH0721638B2 (en) * | 1986-07-18 | 1995-03-08 | 東京応化工業株式会社 | Substrate processing method |
| US4808235A (en) * | 1987-01-20 | 1989-02-28 | The Dow Chemical Company | Cleaning gas turbine compressors |
| US5102573A (en) * | 1987-04-10 | 1992-04-07 | Colgate Palmolive Co. | Detergent composition |
| JPH01149981A (en) * | 1987-12-07 | 1989-06-13 | Showa Shell Sekiyu Kk | Water-soluble degreasing composition |
| DE3844183A1 (en) * | 1988-12-29 | 1990-07-19 | Metallgesellschaft Ag | AQUEOUS CLEANER FOR METAL SURFACES |
| EP0426943B1 (en) * | 1989-11-08 | 1993-09-15 | Arakawa Chemical Industries, Ltd. | Agent and method for removing rosinbase solder flux |
| US5186744A (en) * | 1991-01-11 | 1993-02-16 | Bodwell James R | Propoxylated PTB coalescing agents for water-borne protective coatings |
| DE69210095T2 (en) * | 1991-05-29 | 1996-09-19 | Fuji Photo Film Co Ltd | Fountain solution concentrate for litho printing |
| US5190595A (en) * | 1991-09-03 | 1993-03-02 | International Business Machines Corporation | Ozone safe stripping solution for thermal grease |
| DE4130494C2 (en) * | 1991-09-13 | 1994-02-03 | Ant Nachrichtentech | Cleaning fluid |
| CA2119646A1 (en) * | 1991-09-24 | 1993-04-01 | Felipe A. Donate | Semi-aqueous cleaning process and solvent compositions |
| DE4138432C1 (en) * | 1991-11-22 | 1993-02-18 | Aichelin Gmbh, 7015 Korntal-Muenchingen, De | |
| JP2652298B2 (en) * | 1992-04-30 | 1997-09-10 | 花王株式会社 | Cleaning composition for precision parts or jigs |
| EP0587917B1 (en) * | 1992-08-07 | 1995-01-04 | DR.O.K. WACK CHEMIE GmbH | Cleaning agent |
| DE9305637U1 (en) * | 1993-04-15 | 1993-06-17 | Dr. O.K. Wack Chemie GmbH, 8070 Ingolstadt | Device for cleaning objects |
-
1993
- 1993-07-27 DE DE4325133A patent/DE4325133A1/en not_active Withdrawn
-
1994
- 1994-06-22 EP EP94109602A patent/EP0636710B1/en not_active Expired - Lifetime
- 1994-06-22 AT AT94109602T patent/ATE145254T1/en not_active IP Right Cessation
- 1994-06-22 DE DE59401027T patent/DE59401027D1/en not_active Expired - Fee Related
- 1994-07-26 CA CA002128846A patent/CA2128846A1/en not_active Abandoned
- 1994-07-27 JP JP6174647A patent/JPH07171521A/en active Pending
-
1996
- 1996-06-03 US US08/657,432 patent/US5626818A/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100419124C (en) * | 2005-02-07 | 2008-09-17 | 长江大学 | Inhibitor for controlling electric dipole corrosion |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0636710A1 (en) | 1995-02-01 |
| DE4325133A1 (en) | 1995-02-02 |
| JPH07171521A (en) | 1995-07-11 |
| US5626818A (en) | 1997-05-06 |
| ATE145254T1 (en) | 1996-11-15 |
| CA2128846A1 (en) | 1995-01-28 |
| DE59401027D1 (en) | 1996-12-19 |
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