Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
  • B60J5/00—Doors
  • B60J5/04—Doors arranged at the vehicle sides
  • B60J5/048—Doors arranged at the vehicle sides characterised by the material
  • B60J5/0483—Doors arranged at the vehicle sides characterised by the material lightweight metal, e.g. aluminum, magnesium
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
  • B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
  • B32B37/18—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
  • B60J5/00—Doors
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
  • B60J5/00—Doors
  • B60J5/04—Doors arranged at the vehicle sides
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C18/00—Alloys based on zinc
  • C22C18/04—Alloys based on zinc with aluminium as the next major constituent
• • 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
  • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
  • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
  • C23C2/06—Zinc or cadmium or alloys based thereon
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2605/00—Vehicles
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
  • Y10T156/10—Methods of surface bonding and/or assembly therefor
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/12—All metal or with adjacent metals
  • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
  • Y10T428/12736—Al-base component

Definitions

• the present invention relates to an assembly of an aluminum-based part and a steel part provided with a coating based on a zinc-aluminum-magnesium alloy on at least one of its faces in contact with one another. at least partial with the aluminum-based part.
• Metal coatings essentially comprising zinc are traditionally used for their good protection against corrosion.
• the addition of magnesium to the coating significantly increases the corrosion resistance of these coatings, which can reduce their thickness or increase the guarantee of protection against corrosion over time.
• the addition of aluminum also improves the corrosion resistance.
• the application EP 2 141 255 describes assemblies in which magnesium is added to the coating of the steel in an amount that may especially vary between 0.8 and 10% by weight. It is also envisaged to add from 0.8 to 3.5% of aluminum to this same coating.
• the invention relates to an assembly according to claim 1 and its use according to claim 6.
• the assembly may also include the features of claim 2 or claim 3.
• the invention also relates to a part according to claim 4 or 5, a vehicle according to claim 6 and a use according to claim 7.
• the invention will now be illustrated by examples given for information only, and not limiting, and with reference to the appended figures in which:
• FIG. 1 represents schematically an assembly according to the invention
• FIG. 2 represents curves for measuring the evolution of the average depth of corrosion of the aluminum panels within assemblies according to the invention in comparison with assemblies according to the invention. the prior art
• FIG. 3 represents measurement curves of the evolution of the galvanic coupling current density of assemblies according to the invention in comparison with assemblies according to the prior art.
• the assembly 1 firstly comprises a first aluminum-based element which here takes the form of a panel 2.
• a first aluminum-based element which here takes the form of a panel 2.
• This covers pure aluminum and all its alloys comprising at least 85% by weight.
• aluminum weights among which the 1000 to 7000 series which include non-addition aluminum and alloys of various compositions:
• This panel 2 has dimensions adapted to the subsequent use of the assembly according to the invention.
• the assembly 1 in question is integrated with a vehicle door, the aluminum-based panel being positioned on the outer side of this vehicle.
• the aluminum-based panel 2 may further comprise on at least a portion of its surface one or more protective coatings type phosphating and / or cataphoresis, such as those usually applied to the blank crates of vehicles. Since the assembly with the second coated steel element 3 is generally carried out before the blank crate passes through the phosphating and / or cataphoresis coating baths, only the parts outside the assembly zone will then be coated. .
• the second element of the assemblies according to the invention is therefore a steel element 3 provided on at least one of its faces with a metal coating based on an alloy zinc-aluminiurr ⁇ agnesium-Gdmterrorism from 2.3 to 3.3% by weight of magnesium, 3.5 to 3.9% OITP "aluminum, the remainder of the metal coating is zinc and unavoidable impurities optionally one or more additional elements selected from Si, Sb, Pb, Ti, Ca, Mn, Sn, La, Ce, Cr, Ni or Bi.
• each additional element is generally less than 0.3%.
• the additional elements may allow, among other things, to improve the ductility or adhesion of the coating on the steel element. Those skilled in the art who know their effects on the characteristics of the coating will know how to use them according to the complementary aim sought.
• the coating may finally contain residual elements from, for example, the coating bath when a hot dip coating process is used. This can be polluted by impurities from the ingots or resulting from the passage of the steel element in the coating bath. Iron may especially be mentioned, the content of which may be up to 5% by weight and is generally between 2 and 4% by weight in the coating.
• the coating comprises from 2.3 to 3.3% by weight of magnesium and from 3.6 to 3.9% by weight of aluminum.
• the mass ratio between the magnesium and the aluminum in the metallic coating is strictly less than or equal to 1, preferably strictly less than 1, and more preferably strictly less than 0.9.
• the metal coating generally has a thickness less than or equal to 30 or even 25 ⁇ and greater than or equal to 3 or even 5 ⁇ .
• the two elements 2, 3 are assembled such that the coated face of the element 3 made of steel is in at least partial contact with the element 2 based on aluminum.
• the assembly can be made in particular by a mechanical method such as crimping the two elements in an assembly zone 5 located in the example shown in FIG. 1, in the lower part of the assembly. door formed by the assembly 1.
• Such crimping may consist of a simple folding of one of the elements around the other, as shown in Figure 1 where the element 2 surrounds the element 3. It is of course possible to:, make any other type of mechanical assembly known to those skilled in the art.
• the panels according to the invention by structural bonding by means of an adhesive or a structural mastic which allow an assembly such as the mechanical stresses undergone by one or other of the elements 2, 3 will be transmitted to the other element 3, 2.
• the layers of adhesives and / or sealants being very thin (Generally less than 5 mm, or even less than 1 mm and even less than 200 ⁇ ⁇ ⁇ ), it will be considered that such a bonded assembly amounts to bringing the two elements 2, 3 into contact in the same way as a simple mechanical assembly.
• assembly samples of aluminum panels AA6061 and steel panels coated with zinc-aluminum-magnesium alloys of variable composition were made, the coatings having a uniform thickness of 7.5 ⁇ .
• These assemblies consist of a first coated steel panel, a size of 10 cm in width and 20 cm in height. It is assembled by gluing an aluminum panel with a size of 10 cm in width and 4 cm in height and having a thickness of 1 mm. The aluminum panel is positioned in the center of the steel panel and the spacing between the two panels due to the presence of adhesive is 120 ⁇ , which simulates an assembly such as that of a motor vehicle door.
• the active area where the two unpainted facings face each other is 6 cm wide by 4 cm high.
• a copper wire connects the two facings in order to put them in electrical contact and thus be able to simulate the galvanic corrosion in the active zone.
• the non-active surface of the two facings is protected by a paint obtained by phosphatation followed by cataphoresis.
• Phosphating is carried out in three stages with Chemetall products: (i) Gardoclean S 5176 degreaser + H7352 additive, (ii) Gardolene ZL6 refiner, (Ni) Gardobond R24TA phosphating bath.
• the test used is the VDA 233-102 test, which plans to submit samples to a series of treatment cycles, each cycle lasting one week, with a succession of sub-cycles A, B and C of 24 hours each.
• - cycle B 24-hour cycle without treatment with salt spray, at a temperature varying between 25 and 50 ° C and a relative humidity ranging between 70 and
• cycle C cycle without treatment with salt spray, at a temperature varying between -15 and 50 ° C and a relative humidity varying between 70 and 95%.
• the saline solution used is an aqueous solution containing 1% by weight of sodium chloride.
• the aluminum panel is electrically connected to its cataphoresis-coated area and the lower area of the coated steel panel, interposing a zero resistance ammeter (Potentiostat Bio-Logic VMP3).
• measurements of aluminum attack depth are made by laser triangulation over the entire surface. of a sample, then extract the maximum value observed, in micrometers.
• sample 3 makes it possible to obtain results that are very significantly better than the comparative tests 1 and 2. There is certainly some improvement in the corrosion resistance between the sample 2 and the sample 1 after 12 cycles. but the improvement obtained in sample 3 is of a much greater magnitude and quite surprising. Furthermore, considering the results after 6 cycles, there is an extremely important difference in behavior between the test according to the invention and the comparative tests, the maximum depth of attack of the aluminum element being divided by a factor of more than 15.
• sample 4 makes it possible to obtain results that are very significantly better than the comparative tests 1 to 3. There is certainly some improvement in the corrosion resistance between the samples 2 and 3 and the sample 1, but the improvement obtained in sample 4 is here too, of a much greater magnitude and quite surprising, especially since the sample 3, with larger amounts of aluminum and magnesium than the sample 2, finally has the same performance as the sample 2, which did not leave provide that a further increase in aluminum and magnesium levels would improve performance, particularly in these proportions.

Landscapes

• Chemical & Material Sciences (AREA)
• Mechanical Engineering (AREA)
• Engineering & Computer Science (AREA)
• Organic Chemistry (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Coating With Molten Metal (AREA)
• Laminated Bodies (AREA)
• Prevention Of Electric Corrosion (AREA)
• Body Structure For Vehicles (AREA)
• Paints Or Removers (AREA)
• Other Surface Treatments For Metallic Materials (AREA)
• Gasket Seals (AREA)

Priority Applications (18)

Applications Claiming Priority (1)

Related Child Applications (2)

Publications (1)

Family

ID=48614067

Family Applications (1)

Country Status (17)

Cited By (2)

Families Citing this family (5)

Citations (3)

Family Cites Families (9)

• 2013
  • 2013-05-13 CN CN201380036716.0A patent/CN104487605B/zh active Active
  • 2013-05-13 MA MA37745A patent/MA37745B1/fr unknown
  • 2013-05-13 HU HUE13728511A patent/HUE027742T2/en unknown
  • 2013-05-13 PL PL13728511.0T patent/PL2875164T3/pl unknown
  • 2013-05-13 US US14/413,965 patent/US20150191077A1/en not_active Abandoned
  • 2013-05-13 CA CA2878810A patent/CA2878810C/fr active Active
  • 2013-05-13 KR KR1020157000582A patent/KR101577174B1/ko active Active
  • 2013-05-13 JP JP2015523616A patent/JP5849174B2/ja active Active
  • 2013-05-13 IN IN128DEN2015 patent/IN2015DN00128A/en unknown
  • 2013-05-13 ES ES13728511.0T patent/ES2579382T3/es active Active
  • 2013-05-13 RU RU2015100887/11A patent/RU2583424C1/ru active
  • 2013-05-13 UA UAA201500238A patent/UA113884C2/uk unknown
  • 2013-05-13 MX MX2015000522A patent/MX360930B/es active IP Right Grant
  • 2013-05-13 EP EP13728511.0A patent/EP2875164B8/fr active Active
  • 2013-05-13 BR BR112015000360A patent/BR112015000360B8/pt active IP Right Grant
  • 2013-05-13 WO PCT/IB2013/000929 patent/WO2014184599A1/fr not_active Ceased
• 2015
  • 2015-01-05 ZA ZA2015/00011A patent/ZA201500011B/en unknown
• 2019
  • 2019-05-03 US US16/402,763 patent/US11370279B2/en active Active

Patent Citations (3)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events