+

WO1998026109A1 - Traitement de surfaces en aluminium - Google Patents

Traitement de surfaces en aluminium Download PDF

Info

Publication number
WO1998026109A1
WO1998026109A1 PCT/GB1997/003409 GB9703409W WO9826109A1 WO 1998026109 A1 WO1998026109 A1 WO 1998026109A1 GB 9703409 W GB9703409 W GB 9703409W WO 9826109 A1 WO9826109 A1 WO 9826109A1
Authority
WO
WIPO (PCT)
Prior art keywords
composition
functional compound
compound
acid
ions
Prior art date
Application number
PCT/GB1997/003409
Other languages
English (en)
Inventor
Jim Taylor
Original Assignee
Henkel Kommanditgesellschaft Auf Aktien
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Henkel Kommanditgesellschaft Auf Aktien filed Critical Henkel Kommanditgesellschaft Auf Aktien
Publication of WO1998026109A1 publication Critical patent/WO1998026109A1/fr

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C22/00Chemical 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
    • C23C22/05Chemical 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
    • C23C22/06Chemical 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
    • C23C22/34Chemical 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
    • C23C22/36Chemical 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
    • C23C22/361Chemical 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 containing titanium, zirconium or hafnium compounds

Definitions

  • This invention relates to the treatment of aluminium surfaces to reduce roughness.
  • the invention relates to the treatment of aluminium cans during their production to enhance their mobility through the production line.
  • EP-A-293 820 is an example showing how the addition of a lubricant and surface conditioner to the final rinse before drying and painting can increase the mobility of the cans by reducing surface roughness.
  • a disadvantage of this process is that excess lubricant and surface conditioner may have adverse effects on painting and, since the lubricant and surface conditioner is water soluble, any excess cannot be washed off without risking removal of all of it.
  • US-3 332 452 proposes a composition which is added simultaneously with the application of a conversion coating and which enhances mobility of the cans. This has the advantage that, any excess material can be removed by a rinse whilst leaving the mobility aid adhered to the aluminium surface together with the conversion coating. It is therefore an object of the present invention to provide another composition which can be added simultaneously with the conversion coating composition to give mobility, i.e. increased slipperiness, to the surfaces of the cans, particularly during the subsequent painting step.
  • a composition which is soluble in acid conditions and which contains as a mobility aid a bi-functional compound, such as one which contains amine and carboxylate functions, the compound being one which does not alter the water-break free nature of a cleaned aluminium surface.
  • a composition will have an acidic pH, typically from pH 2.0 to 4.0, and more preferably 3.2 to 3.6.
  • the invention therefore also extends to a method of treatment of an aluminium surface with such a composition.
  • Such a composition is preferably added to the conversion coating composition and so a combined composition can comprise a source of zirconium ions, a source of fluoride ions, a source of phosphate ions, and a bi-functional compound such as one containing amine and carboxylate functions, which is soluble in acid conditions and which does not alter the water- - break free nature of a cleaned aluminium surface, the composition having an acidic pH.
  • a typical composition there may be from about 10 to 100 ppm of zirconium ions, from about 20 to 200 ppm of fluoride ions and from about 5 to 100, and more preferably 60 to 80, ppm of phosphate ions.
  • the composition will also contain an acid, e.g. nitric acid, preferably in an amount sufficient to adjust the pH of a working bath using the composition to from 2.0 to 4.0, and more preferably 3.2 to 3.6.
  • the bi-functional compound must be an organic moiety and that this should contain a carbon chain such as an alkyl group of sufficient size to give lubricity to the finished can.
  • the bi-functional compound contains a carbon chain of length C 8 or greater, and more preferably of C 12 or greater. It also appears that the bi-functional compound should contain a group such as an amine group between the alkyl chain and the anionic group, to ensure that the bi-functional compound is soluble under acidic conditions .
  • the bi-functional compound should contain a weakly anionic group such that the compound will precipitate or chemisorb onto the conversion coating given to the can. If the anionic group is too strong, e.g. a sulphonate, this will not aid mobility because it does not appear to precipitate.
  • a weakly acidic group must, however, be soluble in the acid conditions of the composition and so an acid group from a long chain fatty acid cannot be used. The anionic group should therefore be both a weakly acid group and be soluble under acid conditions. Examples of suitable anionic groups are carbonate and phosphate acid ester groups . When a drawn aluminium can is cleaned to removed lubricant and aluminium fines after drawing, the cleaned surface will be water-break free.
  • the bi- functional compound should be chosen such that the cleaned aluminium surface treated with the compound remains water-break free. The bi-functional compound should therefore be water soluble.
  • a suitable bi-functional compound is the alkyl amine carboxylate sold under the trade name Amphionic 32B by Rhone Poulenc .
  • An advantage of the invention is that the bi- functional compound will give increased mobility to the treated can so that there is less risk of jamming during later process steps in the production line, e.g. during removal from the mandril during the conversion coating step. No additional or separate treatment step is required since the bi-functional compound can be applied during the conversion coating step and any excess material can be removed during later washing steps which are conventional. Thus, the bi-functional compound seems to become incorporated into the conversion coating either by adsorption or chemisorption, so that washing will only remove an excess and not remove it completely.
  • the bi-functional compound seem to have no detrimental effect on the conversion coating itself. No significant change is required to the production line, although if desired it is possible for the bi-functional compound to be added in a separate step after the conversion coating.
  • the composition of the conversion coating can be largely conventional and for examples of particular materials, concentrations, types of treatment, etc. reference is directed to US-5 332 452, the whole disclosure of which is deemed to be incorporated herein.
  • the concentration of the conversion coating compounds in the treatment bath can be reduced as compared with the conventional amounts disclosed in US-5 332 452 if one wishes to provide the resulting aluminium cans with mobility and staining of the dome in the underside of the can is not important because the contents of the filled can do not need pasteurisation. Therefore one can reduce the concentration of the conversion coating components to the minimum necessary to hold the bi-functional compound on the surface of the cans .
  • Further advantages of the invention are that the addition of the bi-functional compound to the conversion coating composition does not give sludge or foam in the treatment bath, the composition is tolerant of the presence of residual oils, and the resulting cans are water-break free after their final rinse which enhances drying. Also the compositions appear to impart no adverse taste to the liquid in the final filled cans.
  • the cans treated in this way have a high mobility and when subjected to a conventional slip test, slip angles of 20° are typical and angles of 17° to 18° are often possible.
  • an untreated can would typically have a slip angle of 50° to 60° and there would be no significant improvement in handling of the cans during painting unless the angle was less than 35°. Angles of 20° are therefore regarded as very good.
  • a treatment bath containing the conversion coating composition and bi-functional compound would operate at a temperature of about 35 to 38 °C, preferable about 35°C, a contact time of about 10 to 30 s, preferably about 15 s, a pH of about 3.2 to 3.6, preferably about 3.2, a free acid content of about 0.6 to 1.2%.
  • the bi-functional compound is preferably present in the bath in an amount of from about 0.01 to 0.1%, and more preferably about 0.02 to 0.035%, by weight of the total bath weight.
  • the spraying conditions were: temperature 30°C spray pressure 6psi time 10s.
  • the cans were again subject to a water rinse for 20s followed by a rinse in de-ionised water for 20s.
  • Amphionic 25B were determined. Slip angles above 24° are inconsistent and difficult to measure and so are not reported.

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)
  • Chemical Treatment Of Metals (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

On traite des surfaces en aluminium pour réduire la rugosité de surface en mettant celles-ci au contact d'une composition qui est soluble dans des conditions acides et contient, comme agent favorisant la mobilité, un composé bifonctionnel présentant, par exemple, des fonctions amine et caboxylate, ledit composé faisant partie de ceux qui n'altèrent pas l'absence de rupture du film d'eau d'une surface en aluminium nettoyée. Cette composition présente un pH acide compris généralement entre 2,0 et 4,0, ou, de préférence, entre 3,2 et 3,6.
PCT/GB1997/003409 1996-12-11 1997-12-10 Traitement de surfaces en aluminium WO1998026109A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9625652.4A GB9625652D0 (en) 1996-12-11 1996-12-11 The treatment of aluminium surfaces
GB9625652.4 1996-12-11

Publications (1)

Publication Number Publication Date
WO1998026109A1 true WO1998026109A1 (fr) 1998-06-18

Family

ID=10804243

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/003409 WO1998026109A1 (fr) 1996-12-11 1997-12-10 Traitement de surfaces en aluminium

Country Status (2)

Country Link
GB (1) GB9625652D0 (fr)
WO (1) WO1998026109A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3900149A1 (de) * 1988-01-04 1989-07-13 Kao Corp Verfahren zur behandlung der oberflaeche eines metallgegenstandes und die dafuer geeignete waessrige loesung
WO1991019828A1 (fr) * 1990-06-19 1991-12-26 Henkel Corporation Composition liquide et procede de traitement de boites en aluminium ou en fer blanc destines a ameliorer la resistance a la corrosion et a reduire le coefficient de friction
US5139586A (en) * 1991-02-11 1992-08-18 Coral International, Inc. Coating composition and method for the treatment of formed metal surfaces
WO1994001517A1 (fr) * 1992-07-08 1994-01-20 Henkel Corporation Conditionnement de surface et lubrification aqueuse pour surfaces metalliques travaillees
WO1995002660A1 (fr) * 1993-07-13 1995-01-26 Henkel Corporation Agent de conditionnement de surface/lubrifiant aqueux pour des surfaces metalliques formees
EP0643127A2 (fr) * 1990-03-13 1995-03-15 Henkel Corporation Traitement de surface de pièces en aluminium formées
EP0645473A1 (fr) * 1993-08-31 1995-03-29 Nippon Paint Company Limited Méthode de conversion chimique et méthode du traitement de la surface pour une boîte métallique
WO1995033869A1 (fr) * 1994-06-03 1995-12-14 Henkel Corporation Composition et procede de traitement de la surface de metaux alumineux

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3900149A1 (de) * 1988-01-04 1989-07-13 Kao Corp Verfahren zur behandlung der oberflaeche eines metallgegenstandes und die dafuer geeignete waessrige loesung
EP0643127A2 (fr) * 1990-03-13 1995-03-15 Henkel Corporation Traitement de surface de pièces en aluminium formées
WO1991019828A1 (fr) * 1990-06-19 1991-12-26 Henkel Corporation Composition liquide et procede de traitement de boites en aluminium ou en fer blanc destines a ameliorer la resistance a la corrosion et a reduire le coefficient de friction
US5139586A (en) * 1991-02-11 1992-08-18 Coral International, Inc. Coating composition and method for the treatment of formed metal surfaces
US5332452A (en) * 1991-02-11 1994-07-26 Coral International, Inc. Coating composition and method for the treatment of formed metal surfaces
WO1994001517A1 (fr) * 1992-07-08 1994-01-20 Henkel Corporation Conditionnement de surface et lubrification aqueuse pour surfaces metalliques travaillees
WO1995002660A1 (fr) * 1993-07-13 1995-01-26 Henkel Corporation Agent de conditionnement de surface/lubrifiant aqueux pour des surfaces metalliques formees
EP0645473A1 (fr) * 1993-08-31 1995-03-29 Nippon Paint Company Limited Méthode de conversion chimique et méthode du traitement de la surface pour une boîte métallique
WO1995033869A1 (fr) * 1994-06-03 1995-12-14 Henkel Corporation Composition et procede de traitement de la surface de metaux alumineux

Also Published As

Publication number Publication date
GB9625652D0 (en) 1997-01-29

Similar Documents

Publication Publication Date Title
CA1263589A (fr) Agent nettoyant pour surfaces d'aluminium
US4599116A (en) Alkaline cleaning process
KR960014931B1 (ko) 형성된 금속표면을 위한 윤활제 및 표면조절제
US5080814A (en) Aqueous lubricant and surface conditioner for formed metal surfaces
JP3812950B2 (ja) ブリキ材用の腐食防止清浄化剤
CA2646790C (fr) Procede de revetement d'une bobine ou de feuilles metalliques destine a produire des articles creux
US4370173A (en) Composition and method for acid cleaning of aluminum surfaces
US5683522A (en) Process for applying a coating to a magnesium alloy product
EP0645473A1 (fr) Méthode de conversion chimique et méthode du traitement de la surface pour une boîte métallique
CZ74996A3 (en) Process of cleaning and coating metal surfaces and an acid aqueous solution containing rare earth ions for making the same
CA2200587C (fr) Traitement a l'acide de l'acier inoxydable
GB2158845A (en) Composition and process for treatment of ferrous substrates
EP0969078A2 (fr) Procédé de traitement de surfaces métalliques embouties
WO1996009994A1 (fr) Traitement alcalin d'acier inoxydable
US5279677A (en) Rinse aid for metal surfaces
US4294627A (en) Treatment of tinplate surfaces
US4610798A (en) Method and composition of matter for conditioning and passivating certain metals
WO1998026109A1 (fr) Traitement de surfaces en aluminium
US3615892A (en) Composition and method for black coating on metals
AU600689B2 (en) Process for cleaning aluminum
US5496585A (en) Method for reducing volatile organic compound emissions
US3493441A (en) Detoxification of hexavalent chromium containing coating on a metal surface
US3052575A (en) Method of inhibiting corrosion
US6153015A (en) Process for removing soap-contaminated conversion layers on metal workpieces
US3380859A (en) Metal cold forming

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA CN GB JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
点击 这是indexloc提供的php浏览器服务,不要输入任何密码和下载