WO2001006035A1 - Verfahren zur korrosionsschützenden behandlung oder nachbehandlung von metalloberflächen - Google Patents
Verfahren zur korrosionsschützenden behandlung oder nachbehandlung von metalloberflächen Download PDFInfo
- Publication number
- WO2001006035A1 WO2001006035A1 PCT/EP2000/006397 EP0006397W WO0106035A1 WO 2001006035 A1 WO2001006035 A1 WO 2001006035A1 EP 0006397 W EP0006397 W EP 0006397W WO 0106035 A1 WO0106035 A1 WO 0106035A1
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- WO
- WIPO (PCT)
- Prior art keywords
- ions
- treatment
- solution
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- Prior art date
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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
- C23C22/06—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
- C23C22/34—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 containing fluorides or complex fluorides
- C23C22/36—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 containing fluorides or complex fluorides containing also phosphates
-
- 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
- C23C22/34—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 containing fluorides or complex fluorides
-
- 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
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
Definitions
- the invention is in the field of anti-corrosion treatment of surfaces of steel, galvanized or alloy galvanized steel or of aluminum or its alloys.
- the process can serve as an independent anti-corrosion treatment before painting and can be used, for example, instead of iron phosphating.
- the method is also suitable for post-treating non-layer-forming or layer-forming phosphated metal surfaces.
- it is suitable for a corrosion-protective aftertreatment of components such as, for example, automobile bodies, which were produced from pre-phosphated material.
- the phosphate layer on cut edges or on grinding points is removed or damaged.
- Such areas have weakened corrosion protection.
- the aftertreatment of such components according to the invention on the one hand enhances the corrosion protection effect of the existing phosphate layer and on the other hand causes spots with removed or damaged phosphate layer to be coated with a corrosion protection layer.
- the components can then be painted.
- EP-B-713 540 teaches an aqueous treatment solution for metal surfaces which contain as essential components: a) fluorometallate anions of the elements titanium, zirconium, hafnium, silicon, aluminum and boron, b) cations of selected metals, for example copper, c) phosphorus containing inorganic oxo anions and / or phosphonate ions and d) water-soluble or water-dispersible polymer.
- WO 97/02369 discloses aqueous solutions for the treatment of aluminum surfaces which contain a) phosphate ions, b) titanium ions or titanium compounds, c) fluoride ions or fluorine-containing compounds and d) an accelerator. It can be assumed that fluorine complexes of titanium form from components b) and c). Oxidizers are selected as accelerators, selected from nitrite, nitrate, tungstate, molybdate, permanganate and water-soluble organoperoxides.
- the invention relates to a method for the corrosion-protective treatment or aftertreatment of bare or phosphated surfaces of steel, galvanized or alloy-galvanized steel or of aluminum or its alloys, the metal surfaces being brought into contact with an aqueous solution which a) 0.05 to 10 g / l complex fluorides of boron, silicon, titanium and / or zirconium and b) one or more phosphating accelerators selected from 0.05 to 2 g / l m-nitrobenzenesulfonate ions,
- the method according to the invention can be used as a corrosion protection method for a bare metal surface, which is then coated immediately or, if appropriate, after a longer period of transport and / or storage.
- This provides an alternative for conventional non-layer-forming iron phosphating, which is similarly simple in terms of process technology and which offers advantages in terms of corrosion protection compared to iron phosphating.
- the process for Post-treatment suitable for non-layer-forming and in particular layer-forming phosphated metal surfaces. It thus represents an alternative to the still widespread aftertreatment processes with chromium (VI) -containing solutions.
- the aftertreatment according to the invention leads to improved corrosion protection.
- the method is particularly suitable for the aftertreatment of components such as, for example, automobile bodies, which have been produced from pre-phosphated material.
- areas that have no or a damaged phosphate layer are adequately protected against corrosion so that they can then be painted.
- Aftertreatment of a zinc phosphate layer with the process according to the invention makes it possible to use solutions for zinc phosphating which contain little or no nickel.
- Such phosphating systems have disadvantages with regard to paint adhesion and corrosion protection on certain materials compared to nickel-containing phosphating systems. These disadvantages are compensated for by an aftertreatment with the method according to the invention. It is therefore possible to use a nickel-free or low-nickel phosphating process in connection with the aftertreatment process according to the invention. In this way, the advantages of the nickel-free zinc phosphating process with regard to wastewater treatment and sludge disposal can be exploited without having to accept the disadvantages of a nickel-free process.
- Solutions are preferably used that contain complex fluorides of titanium and / or zircon. If the process for a belt treatment is used as a "no-rinse process", contents of complex fluorides in the range from 1000 to 10000 mg / l are preferred. If components are treated for a longer period of time, which are subsequently rinsed, contents of complex Fluorides in the range from 100 to 1000, in particular 150 to 500 mg / l are preferred.
- Phosphating accelerators of group b) are known as components of a layer-forming phosphating, in particular a zinc phosphating. They have the property of supporting the formation of a desired fine-crystalline, closed phosphate layer.
- component b) 50 to 1000 mg / l m-nitrobenzenesulfonate ions, 1 to 10 g / l organic N-oxides, preferably N-methylmorpholine-N-oxide or 0.5 to 10 g / l, preferably 0.8 to 5 g / l hydroxylamine in free or bound form.
- hydroxylamine as such, as a salt, in particular as a sulfate or phosphate, or in the form of a hydroxylamine-releasing compound can be used.
- Hydroxylamine is preferably used as such or as sulfate.
- the acid-base balance between free hydroxylamine and hydroxylammonium ions is established.
- the corrosion protection effect achieved by the treatment according to the invention can be increased further if the solution contains 0.1 to 50 mg / l, preferably 1 to 10 mg / l copper ions. These can be introduced into the solution, for example in the form of nitrate, sulfate or acetate.
- An additional use of 0.2 to 2 g / l phosphate ions can offer further advantages.
- such an addition has the effect that iron (III) ions dissolving when iron-containing surfaces are treated are precipitated as iron phosphate and do not thereby interfere with the further treatment.
- an additional use of 50 to 2000 mg / l, preferably 100 to 1000 mg / l, of fluoride ions can offer advantages due to their complexing action for the metals mentioned.
- the treatment solution can contain further metal ions, in particular those which are known as components of zinc phosphating or of rinse solutions after zinc phosphating.
- Preferred metal ions are: Zn (ll), Mn (ll), Ce (III), Ca (II), Ni (II), Ag (III) and Pd (II). Their concentrations are preferably 0.3 to 3 g / l each.
- the pH of the treatment solution for the process according to the invention is preferably set to a range from 2 to 5.5, in particular from 3.5 to 5. If necessary, the pH can be lowered to the desired range by using the free acids of components a), and in the case of excessively acidic solutions to the desired range by adding alkali metal hydroxide, alkali metal carbonate or ammonia.
- the duration of the treatment that is to say the time period between the first contact of the surface with the treatment solution and the beginning of the drying or rinsing of this treatment solution, depends on the application method. In the case of a no-rinse belt treatment, in which the treatment solution is brought into contact with the belt surface by rolling, spraying or dipping with subsequent squeezing, the treatment time is preferably in the range between 2 and 10 seconds.
- the treatment solution is then dried in a drying oven without rinsing.
- the treatment solution is preferably brought into contact with the metal surface for a period of between 1 and 5 minutes. To do this, you can either spray the metal surface with the treatment solution or immerse the parts to be treated in the treatment solution. Subsequently, it is generally rinsed with water, preferably with fully demineralized water.
- the invention relates to a method for the anti-corrosion aftertreatment of components which have been produced from pre-phosphated material selected from steel, galvanized steel or alloy-galvanized steel or from aluminum or its alloys, the components being brought into contact with an aqueous solution which a) 0.05 to 10 g / l complex fluorides of boron, silicon, titanium and / or zircon and b) one or more phosphating accelerators selected from
- This embodiment takes into account the development that more and more pre-phosphated material is used, for example, for the construction of vehicles and household appliances. This is supplied in tape form to the component manufacturer. This cuts the strip into pieces, which are formed and assembled into the desired components, for example by welding or flanging. While car bodies made of pre-phosphated material are phosphated again in the automotive industry, household appliances made of pre-phosphated material are cleaned after assembly if necessary, but no longer phosphated.
- a complex phosphating system could also be dispensed with in the automotive industry if the bodies made of pre-phosphated material require cleaning and a one-step aftertreatment before painting in order to achieve the required corrosion protection. Until now, this was not possible because there is no or a damaged phosphate layer at the cut edges or at grinding points. At these points, the corrosion protection effect is at least insufficient if the body is not made of galvanized steel.
- the method according to the invention has the advantage that the corrosion protection effect of the phosphate layer present is increased and that a sufficient corrosion protection layer is produced at those points where the phosphate layer is missing or damaged.
- the method according to the invention was used for the corrosion protection treatment of bare, cleaned metal sheets which were painted after this treatment and subjected to a corrosion test.
- Cold-rolled steel (CRS) and electrolytically galvanized steel (EG) were used as substrates.
- M Ti or Zr, content of the treatment solution of Ti or Zr in ppm
- HAS hydroxylammonium sulfate
- Ludigol m-nitrobenzenesulfonate
- MOON N-methylmorpholine-N-oxide
- the phosphating was carried out in dipping for a period of 4 minutes with a phosphating solution at a temperature of 40 ° C. and the following composition:
- the rinsing was carried out with treatment solutions of different temperatures by immersion for a period of 4 minutes. Further tests showed that values of 1 to 3 minutes were even better than those of 4 minutes.
- the aftertreatment was carried out with solutions containing such an amount
- Hexafluorozirconate contained that the Zr concentration was 100 ppm.
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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)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00953020A EP1208247A1 (de) | 1999-07-15 | 2000-07-06 | Verfahren zur korrosionsschützenden behandlung oder nachbehandlung von metalloberflächen |
AU65621/00A AU6562100A (en) | 1999-07-15 | 2000-07-06 | Method for the anticorrosive treatment or post-treatment of metal surfaces |
KR1020017015940A KR20020019460A (ko) | 1999-07-15 | 2000-07-06 | 금속표면의 방식처리 또는 후처리 방법 |
JP2001511240A JP2003505590A (ja) | 1999-07-15 | 2000-07-06 | 金属表面の防食処理あるいは後処理のプロセス |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19933189.8 | 1999-07-15 | ||
DE19933189A DE19933189A1 (de) | 1999-07-15 | 1999-07-15 | Verfahren zur korrosionsschützenden Behandlung oder Nachbehandlung von Metalloberflächen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001006035A1 true WO2001006035A1 (de) | 2001-01-25 |
Family
ID=7914902
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/006397 WO2001006035A1 (de) | 1999-07-15 | 2000-07-06 | Verfahren zur korrosionsschützenden behandlung oder nachbehandlung von metalloberflächen |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1208247A1 (de) |
JP (1) | JP2003505590A (de) |
KR (1) | KR20020019460A (de) |
AU (1) | AU6562100A (de) |
DE (1) | DE19933189A1 (de) |
WO (1) | WO2001006035A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007043479A1 (de) * | 2007-09-12 | 2009-03-19 | Valeo Schalter Und Sensoren Gmbh | Verfahren zur Oberflächenbehandlung von Aluminium und ein Schichtaufbau eines Bauteils aus Aluminium mit einer elektrischen Kontaktierung |
WO2015171413A1 (en) * | 2014-05-05 | 2015-11-12 | Ppg Industries Ohio, Inc. | Metal pretreatment modification for improved throwpower |
US10435806B2 (en) | 2015-10-12 | 2019-10-08 | Prc-Desoto International, Inc. | Methods for electrolytically depositing pretreatment compositions |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1455001B1 (de) * | 2001-12-04 | 2013-09-25 | Nippon Steel & Sumitomo Metal Corporation | Mit metalloxid und/oder metallhydroxid beschichtetes metallisches material und herstellungsverfahren dafür |
ATE412073T1 (de) * | 2002-12-24 | 2008-11-15 | Chemetall Gmbh | Verfahren zur vorbehandlung vor der beschichtung |
CA2454029A1 (en) | 2002-12-24 | 2004-06-24 | Nippon Paint Co., Ltd. | Chemical conversion coating agent and surface-treated metal |
ES2316707T3 (es) * | 2002-12-24 | 2009-04-16 | Chemetall Gmbh | Agente de revestimiento de conversion quimica y metal tratado en superficie. |
TW200417420A (en) * | 2002-12-24 | 2004-09-16 | Nippon Paint Co Ltd | Chemical conversion coating agent and surface-treated metal |
DE10352075A1 (de) * | 2003-11-07 | 2005-06-16 | Henkel Kgaa | Chromfreie, farbige Konversionsschichten auf Metalloberflächen |
JP4966480B2 (ja) * | 2004-01-23 | 2012-07-04 | 日本パーカライジング株式会社 | 耐食性および上塗り塗装性に優れるリン酸亜鉛系処理材用後処理方法ならびに後処理されたリン酸亜鉛系処理材 |
DE102005059314B4 (de) | 2005-12-09 | 2018-11-22 | Henkel Ag & Co. Kgaa | Saure, chromfreie wässrige Lösung, deren Konzentrat, und ein Verfahren zur Korrosionsschutzbehandlung von Metalloberflächen |
DE102007057185A1 (de) * | 2007-11-26 | 2009-05-28 | Henkel Ag & Co. Kgaa | Zirconiumphosphatierung von metallischen Bauteilen, insbesondere Eisen |
DE102008038653A1 (de) * | 2008-08-12 | 2010-03-25 | Henkel Ag & Co. Kgaa | Sukzessive korrosionsschützende Vorbehandlung von Metalloberflächen in einem Mehrstufenprozess |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1933013A1 (de) * | 1969-06-28 | 1971-01-07 | Collardin Gmbh Gerhard | Verfahren zur Erzeugung von Schutzschichten auf Aluminium,Eisen und Zink |
DE2031358A1 (en) * | 1970-06-25 | 1971-12-30 | Collardin Gmbh Gerhard | Protective coatings on iron, zinc or aluminium - formed by treatment with acid solns contg complex fluorides, free fluorine |
JPS5424232A (en) * | 1977-07-26 | 1979-02-23 | Nippon Packaging Kk | Surface treating method of aluminum |
JPS5983775A (ja) * | 1982-11-02 | 1984-05-15 | Nippon Paint Co Ltd | 金属表面の化成処理方法 |
EP0514183A1 (de) * | 1991-05-18 | 1992-11-19 | Nippon Paint Co., Ltd. | Verfahren zur Metalloberflächenbehandlung mit Zinkphosphat |
WO1995025831A1 (en) * | 1994-03-24 | 1995-09-28 | Henkel Corporation | Composition and process for treating the surface of aluminiferous metals |
DE4441710A1 (de) * | 1994-11-23 | 1996-05-30 | Henkel Kgaa | Korrosionsschutz und Reibungsverminderung von Metalloberflächen |
WO1996019595A1 (en) * | 1994-12-22 | 1996-06-27 | Henkel Corporation | Low sludging composition and process for treating aluminum and its alloys |
DE19511573A1 (de) * | 1995-03-29 | 1996-10-02 | Henkel Kgaa | Verfahren zur Phosphatierung mit metallhaltiger Nachspülung |
WO1997002369A1 (en) * | 1995-06-30 | 1997-01-23 | Henkel Corporation | Composition and process for treating the surface of aluminiferous metals |
WO1998020186A1 (en) * | 1996-11-06 | 1998-05-14 | Henkel Corporation | Phosphate conversion coating composition and process |
WO1999007916A1 (de) * | 1997-08-06 | 1999-02-18 | Henkel Kommanditgesellschaft Auf Aktien | Mit n-oxiden beschleunigtes phosphatierverfahren |
-
1999
- 1999-07-15 DE DE19933189A patent/DE19933189A1/de not_active Withdrawn
-
2000
- 2000-07-06 EP EP00953020A patent/EP1208247A1/de not_active Withdrawn
- 2000-07-06 JP JP2001511240A patent/JP2003505590A/ja active Pending
- 2000-07-06 AU AU65621/00A patent/AU6562100A/en not_active Abandoned
- 2000-07-06 KR KR1020017015940A patent/KR20020019460A/ko not_active Application Discontinuation
- 2000-07-06 WO PCT/EP2000/006397 patent/WO2001006035A1/de not_active Application Discontinuation
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1933013A1 (de) * | 1969-06-28 | 1971-01-07 | Collardin Gmbh Gerhard | Verfahren zur Erzeugung von Schutzschichten auf Aluminium,Eisen und Zink |
DE2031358A1 (en) * | 1970-06-25 | 1971-12-30 | Collardin Gmbh Gerhard | Protective coatings on iron, zinc or aluminium - formed by treatment with acid solns contg complex fluorides, free fluorine |
JPS5424232A (en) * | 1977-07-26 | 1979-02-23 | Nippon Packaging Kk | Surface treating method of aluminum |
JPS5983775A (ja) * | 1982-11-02 | 1984-05-15 | Nippon Paint Co Ltd | 金属表面の化成処理方法 |
EP0514183A1 (de) * | 1991-05-18 | 1992-11-19 | Nippon Paint Co., Ltd. | Verfahren zur Metalloberflächenbehandlung mit Zinkphosphat |
WO1995025831A1 (en) * | 1994-03-24 | 1995-09-28 | Henkel Corporation | Composition and process for treating the surface of aluminiferous metals |
DE4441710A1 (de) * | 1994-11-23 | 1996-05-30 | Henkel Kgaa | Korrosionsschutz und Reibungsverminderung von Metalloberflächen |
WO1996019595A1 (en) * | 1994-12-22 | 1996-06-27 | Henkel Corporation | Low sludging composition and process for treating aluminum and its alloys |
DE19511573A1 (de) * | 1995-03-29 | 1996-10-02 | Henkel Kgaa | Verfahren zur Phosphatierung mit metallhaltiger Nachspülung |
WO1997002369A1 (en) * | 1995-06-30 | 1997-01-23 | Henkel Corporation | Composition and process for treating the surface of aluminiferous metals |
WO1998020186A1 (en) * | 1996-11-06 | 1998-05-14 | Henkel Corporation | Phosphate conversion coating composition and process |
WO1999007916A1 (de) * | 1997-08-06 | 1999-02-18 | Henkel Kommanditgesellschaft Auf Aktien | Mit n-oxiden beschleunigtes phosphatierverfahren |
Non-Patent Citations (2)
Title |
---|
CHEMICAL ABSTRACTS, vol. 90, no. 26, 25 June 1979, Columbus, Ohio, US; abstract no. 208761q, NAGAE Y.: "Surface treatment of aluminum and aluminum alloys" XP002001672 * |
PATENT ABSTRACTS OF JAPAN vol. 008, no. 187 (C - 240) 28 August 1984 (1984-08-28) * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007043479A1 (de) * | 2007-09-12 | 2009-03-19 | Valeo Schalter Und Sensoren Gmbh | Verfahren zur Oberflächenbehandlung von Aluminium und ein Schichtaufbau eines Bauteils aus Aluminium mit einer elektrischen Kontaktierung |
WO2015171413A1 (en) * | 2014-05-05 | 2015-11-12 | Ppg Industries Ohio, Inc. | Metal pretreatment modification for improved throwpower |
US10435806B2 (en) | 2015-10-12 | 2019-10-08 | Prc-Desoto International, Inc. | Methods for electrolytically depositing pretreatment compositions |
US11591707B2 (en) | 2015-10-12 | 2023-02-28 | Ppg Industries Ohio, Inc. | Methods for electrolytically depositing pretreatment compositions |
Also Published As
Publication number | Publication date |
---|---|
KR20020019460A (ko) | 2002-03-12 |
DE19933189A1 (de) | 2001-01-18 |
JP2003505590A (ja) | 2003-02-12 |
EP1208247A1 (de) | 2002-05-29 |
AU6562100A (en) | 2001-02-05 |
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