WO1998026109A1 - Traitement de surfaces en aluminium - Google Patents
Traitement de surfaces en aluminium Download PDFInfo
- 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
Links
- 239000004411 aluminium Substances 0.000 title claims abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 18
- 150000001875 compounds Chemical class 0.000 claims abstract description 39
- 239000000203 mixture Substances 0.000 claims abstract description 33
- 239000002253 acid Substances 0.000 claims abstract description 14
- 230000002378 acidificating effect Effects 0.000 claims abstract description 8
- 150000001412 amines Chemical class 0.000 claims abstract description 4
- 150000007942 carboxylates Chemical group 0.000 claims abstract description 4
- 238000007739 conversion coating Methods 0.000 claims description 20
- -1 zirconium ions Chemical class 0.000 claims description 10
- 239000008199 coating composition Substances 0.000 claims description 8
- 125000000129 anionic group Chemical group 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 6
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- 125000003277 amino group Chemical group 0.000 claims description 2
- 125000004185 ester group Chemical group 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 230000003746 surface roughness Effects 0.000 abstract description 3
- 238000010422 painting Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000012748 slip agent Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- JXLHNMVSKXFWAO-UHFFFAOYSA-N azane;7-fluoro-2,1,3-benzoxadiazole-4-sulfonic acid Chemical compound N.OS(=O)(=O)C1=CC=C(F)C2=NON=C12 JXLHNMVSKXFWAO-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000004668 long chain fatty acids Chemical class 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000009928 pasteurization Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—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
- C23C22/361—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 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.
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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)
- 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.
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)
| 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 |
-
1996
- 1996-12-11 GB GBGB9625652.4A patent/GB9625652D0/en active Pending
-
1997
- 1997-12-10 WO PCT/GB1997/003409 patent/WO1998026109A1/fr active Application Filing
Patent Citations (9)
| 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 |
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