EP2499272B1 - Procédé pour la production de matière en bande ou feuille continue d'aluminium contenant du magnésium présentant une adhérence améliorée - Google Patents
Procédé pour la production de matière en bande ou feuille continue d'aluminium contenant du magnésium présentant une adhérence améliorée Download PDFInfo
- Publication number
- EP2499272B1 EP2499272B1 EP10830248.0A EP10830248A EP2499272B1 EP 2499272 B1 EP2499272 B1 EP 2499272B1 EP 10830248 A EP10830248 A EP 10830248A EP 2499272 B1 EP2499272 B1 EP 2499272B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- aluminium
- degreasing
- magnesium
- sheet material
- process according
- 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.)
- Active
Links
- 239000004411 aluminium Substances 0.000 title claims description 38
- 229910052782 aluminium Inorganic materials 0.000 title claims description 38
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 38
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims description 20
- 229910052749 magnesium Inorganic materials 0.000 title claims description 20
- 239000011777 magnesium Substances 0.000 title claims description 20
- 239000000463 material Substances 0.000 title claims description 17
- 238000000034 method Methods 0.000 title claims description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 22
- 238000005238 degreasing Methods 0.000 claims description 18
- 238000000137 annealing Methods 0.000 claims description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 7
- 239000001117 sulphuric acid Substances 0.000 claims description 7
- 235000011149 sulphuric acid Nutrition 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 2
- 239000000047 product Substances 0.000 description 9
- 229920000642 polymer Polymers 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 239000000395 magnesium oxide Substances 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 poly ethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000005211 surface analysis Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
-
- 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
- C25D11/024—Anodisation under pulsed or modulated current or potential
-
- 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
-
- 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
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
Definitions
- the present invention relates to a process for the production of magnesium containing aluminium alloys, in particular magnesium containing rolled aluminium strip or web material.
- the surface of rolled aluminium strip has excess rolling lubricants and therefore needs to be thoroughly cleaned to provide sufficient adhesion for different types of adhesives or coatings needed to withstand specified use under different and often aggressive environmental conditions.
- Multi Layer Tube/pipe A standard design of these products comprises an inner tube of a poly ethylene (PE / PEX) or other polymer and where tie resin or adhesive is provided on the polymer tube.
- PE / PEX poly ethylene
- An aluminium tube is roll formed around the inner polymer tube and welded. The adhesive secures the roll formed aluminium tube to the polymer tube.
- the aluminium tube is in turn provided with a new layer of tie resin or adhesive prior to the extrusion of the outer polymer (PE or PEX and others).
- the adhesion of the polymer to the aluminium is of outmost importance for the performance of the final product.
- Aluminium for this application is supplied as degreased material.
- the standard process steps related to the production of aluminium sheet materials are by rolling and annealing thereafter chemical degreasing prior to subsequent coating with a lacquer or other organic or inorganic coating.
- magnesium oxide on the surface of aluminium in MLT and other applications give bad adhesion for the adhesive on the aluminium surface.
- the magnesium oxide when exposed to moisture, the magnesium oxide is converted to magnesium hydroxide which is a mild alkali and which can attack the metal underneath a coating, resulting in the loss of adhesion.
- document WO 2008/058708A1 discloses a method of producing a low-creep aluminium alloy product, comprising the processing steps of: a) casting an ingot; b) homogenizing and/or preheating the ingot after casting; c) hot rolling the ingot into a pre-worked product, d) cold rolling the pre-worked product to a final gauge; e) annealing the cold-rolled product at a temperature of 250°C to 550°C.
- the cold-rolled products were subjected to alcalic (alkaline) degreasing before final annealing.
- document US5997721A relates to cleaning aluminium workpieces
- document US 2008/035488A1 relates to a manufacturing process to produce litho sheet
- document US3718547 A relates to continuous electrolytic treatment for cleaning and conditioning aluminium surfaces
- document GB1235661A relates to production of lacquered aluminium or aluminium alloy strip or sheet
- document GB1539341A relates to a process for the pre-treatment of aluminium or aluminium alloy ribbons prior to lacquering.
- magnesium containing aluminium alloys in particular magnesium containing rolled aluminium strip or aluminium sheet material, which is not encumbered with the above disadvantages, but which has excellent surface adhesion properties.
- the invention is characterized by the features as defined in the independent claim 1.
- Magnesium containing aluminium alloys in particular magnesium containing rolled aluminium strip or web material forming basis for the process according to the invention have high strenght and at the same time give excellent forming properties.
- the skilled person would have to choose higher alloyed aluminium if he wants to down gauge the metal and maintain the strength of the product.
- the process according to the invention is based on production of magnesium containing aluminium alloy sheet material of the above kind including the following steps:
- Rolling and levelling is performed in conventional aluminium rolling mill. After levelling, the aluminium sheet is passed to a degreasing unit where it is subjected to electrochemical degreasing including following rinsing and drying.
- the electrochemical degreasing is done by alternating current (AC) in hot sulphuric acid resulting in a very thin aluminium oxide on the surface, typical 10 - 30nm.
- AC alternating current
- aluminium oxide is built at the aluminium - aluminium oxide interface.
- the aluminium web is generating hydrogen gas on the surface and debris and lubricants are flushed off and at the same time the aluminium oxide on the surface is chemically dissolved in the hot sulphuric acid.
- Thin oxide layer is obtained by using sulphuric acid at a concentration of 150 +/- 50 g /litre, current density of preferably 300 - 430 A/m 2 , with a contact time of 1 - 10 seconds, prefrably1.5 - 3.5 seconds and at a temperature of 60 - 90 °C, preferably 75 - 85 °C.
- This oxide is thick enough to stop magnesium from migrating to the surface during soft annealing, but will in stead concentrate at the interface between aluminium oxide layer and aluminium metal.
- the hereby degreased material give excellent adhesion since there is no magnesium oxide on the surface
- Tests were performed with aluminium 3005 alloy sheet substrates with typically 0,5% Mg, comparing chemical degreasing with electrochemical degreasing according to the present invention prior to annealing.
- the chemical degreasing was accomplished by dipping the specimen of the sheet substrate in acid degreasing bath of sulphuric acid and hydrofluoric acid with addition of surfactants.
- electrochemical degreasing according to the invention was done by production equipment with the following parameters, current density 346 A/m2, contact time 6,4 seconds and 150g/ litre sulphuric acid with a temperature of 80°C.
- the surface of electrochemical degreased AA3005 is aluminium oxide (Oxygen peaks at the surface) and the magnesium peak is at the interface between the aluminium oxide and the aluminium metal.
- the surface of the chemically degreased material has magnesium oxide on the outer surface seen by the magnesium peak at the outermost surface.
Landscapes
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Claims (6)
- Procédé pour la production d'alliages de l'aluminium contenant du magnésium avec les étapes suivantes :A. le laminage d'une épaisseur finale d'une matière en feuille d'aluminiumB. le planage de la matière en feuille d'aluminiumC. le dégraissage électrochimique de la matière en feuille d'aluminiumD. le recuit d'adoucissement de la matière en feuille d'aluminiumdans lequel l'étape C est effectuée avant l'étape D, dans lequel le dégraissage électrochimique est effectué par un traitement par courant alternatif (CA) de la matière en feuille d'aluminium dans de l'acide sulfurique ce qui conduit à une couche d'oxyde d'aluminium sur la surface allant jusqu'à 30 nm, et dans lequel le dégraissage électrochimique a lieu à une température comprise entre 60 et 90 °C.
- Procédé selon la revendication 1,
caractérisé en ce qu'
une concentration de l'acide sulfurique est comprise entre 100 et 200 g/litre. - Procédé selon la revendication 1 ou la revendication 2,
caractérisé en ce qu'
une densité de courant CA appliquée est comprise entre 200 et 500 A/m2. - Procédé selon la revendication 1,
caractérisé en ce que
le dégraissage électrochimique a lieu à une température comprise entre 75 et 85 °C. - Procédé selon l'une quelconque des revendications 1 à 4,
caractérisé en ce qu'
un temps de contact sous dégraissage est compris entre 1 et 10 secondes. - Procédé selon la revendication 5,
caractérisé en ce que
le temps de contact sous dégraissage est compris entre 1,5 et 3,5 secondes.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20093346 | 2009-11-13 | ||
PCT/NO2010/000410 WO2011059341A1 (fr) | 2009-11-13 | 2010-11-11 | Procédé pour la production de matière en bande ou feuille continue d'aluminium contenant du magnésium présentant une adhérence améliorée |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2499272A1 EP2499272A1 (fr) | 2012-09-19 |
EP2499272A4 EP2499272A4 (fr) | 2016-03-23 |
EP2499272B1 true EP2499272B1 (fr) | 2017-08-16 |
Family
ID=43991814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10830248.0A Active EP2499272B1 (fr) | 2009-11-13 | 2010-11-11 | Procédé pour la production de matière en bande ou feuille continue d'aluminium contenant du magnésium présentant une adhérence améliorée |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2499272B1 (fr) |
NO (1) | NO2499272T3 (fr) |
WO (1) | WO2011059341A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3551706A1 (fr) * | 2016-12-12 | 2019-10-16 | Norsk Hydro ASA | Produit composite |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1235661A (en) * | 1967-03-30 | 1971-06-16 | Alcan Res & Dev | Production of lacquered aluminium or aluminium alloy strip or sheet |
US3718547A (en) * | 1970-11-16 | 1973-02-27 | Alcan Res & Dev | Continuous electrolytic treatment for cleaning and conditioning aluminum surfaces |
NO143804C (no) * | 1976-03-09 | 1981-04-15 | Nordisk Aluminium As | Fremgangsmaate for forbehandling av aluminiumbaand foer lakkering |
ATE190678T1 (de) * | 1994-12-19 | 2000-04-15 | Alcan Int Ltd | Reinigung von aluminium werkstücken |
CN1802716A (zh) * | 2003-06-03 | 2006-07-12 | 昭和电工株式会社 | 电解电容器电极用铝材的制造方法、电解电容器电极用铝材、电解电容器用电极材料的制造方法及铝电解电容器 |
US20080035488A1 (en) * | 2006-03-31 | 2008-02-14 | Martin Juan Francisco D R | Manufacturing process to produce litho sheet |
EP2089554B1 (fr) * | 2006-11-14 | 2013-06-05 | Aleris Aluminum Duffel BVBA | Tubes multicouches avec une alliage d'aluminium resistant au fluage |
-
2010
- 2010-11-11 WO PCT/NO2010/000410 patent/WO2011059341A1/fr active Application Filing
- 2010-11-11 NO NO10830248A patent/NO2499272T3/no unknown
- 2010-11-11 EP EP10830248.0A patent/EP2499272B1/fr active Active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
EP2499272A1 (fr) | 2012-09-19 |
NO2499272T3 (fr) | 2018-01-13 |
EP2499272A4 (fr) | 2016-03-23 |
WO2011059341A1 (fr) | 2011-05-19 |
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