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Assembly of an aluminum component and of a steel component having a ZnAlMg alloy coating

A metal coating, component technology, applied in the field of assembly of aluminum-based components and steel components, which can solve problems such as low corrosion resistance

Active Publication Date: 2015-04-01
ARCELORMITTAL SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, over time, the corrosion resistance of these components continues to remain too low, so there is a need to improve their corrosion resistance

Method used

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  • Assembly of an aluminum component and of a steel component having a ZnAlMg alloy coating
  • Assembly of an aluminum component and of a steel component having a ZnAlMg alloy coating
  • Assembly of an aluminum component and of a steel component having a ZnAlMg alloy coating

Examples

Experimental program
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Effect test

Embodiment

[0036] For the examples in all detailed implementations, assemblies of panels made of aluminum AA6061 and steel sheets coated with a variable composition aluminium-zinc-(magnesium) alloy were used to construct assembly samples, wherein the coating had Uniform thickness of 7.5 μm.

[0037] These assemblies consisted of a first coated steel plate measuring 10 cm wide and 20 cm high. The process involved the assembly of bonded aluminum panels with dimensions 10 cm wide, 4 cm high and 1 mm thick. An aluminum plate is placed at the center of the steel plate with a separation of 120 μm between the two plates due to the presence of the adhesive, simulating an assembly such as a door of a motor vehicle. The active area with two uncoated sides facing each other had dimensions of 6 cm wide and 4 cm high. A copper wire connects the two sides so that the two sides are in electrical contact, thus enabling simulation of galvanic corrosion in the active area.

[0038] The inactive areas o...

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PUM

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Abstract

The invention relates to an assembly (1) of an aluminum component (2) and of a steel component (3) having, on at least one of the surfaces thereof, a metal coating made of a zinc-aluminum-magnesium alloy including 2.3 to 3.3 % by weight of magnesium, 3.5 to 3.9 % by weight of aluminum, the remainder of the metal coating being zinc, inevitable impurities, and optionally one or more additional elements selected from among Si, Sb, Pb, Ti, Ca, Mn, Sn, La, Ce, Cr, Ni or Bi, said coated surface of the steel component (3) at least partially contacting said aluminum component (2), wherein said contact being achievable via a layer of adhesive and / or putty, the thickness of which is less than 5 mm. The invention also relates to a vehicle component including at least such an assembly, and to a vehicle.

Description

technical field [0001] The invention relates to an assembly of an aluminum-based component and a steel component provided on at least one of its surfaces with a coating made of a zinc-aluminum-magnesium alloy, so as to be at least partially in contact with the aluminum-based component . Background technique [0002] For example, these assemblies are used in the manufacture of automotive body parts, such as door openings and the like, but are not limited thereto. [0003] Traditionally, metal coatings consisting essentially of zinc have been used to give good corrosion protection. The addition of magnesium to coatings significantly increases the corrosion resistance of these coatings, which allows for reduced coating thicknesses or better guarantees of corrosion protection over time. In addition, addition of aluminum can also improve corrosion resistance. [0004] In order to reduce CO 2 emissions, the constant search for weight reductions will lead to the search for hybr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06B60J5/04
CPCB60J5/04C23C2/06Y10T428/12736Y10T156/10B60J5/0483B60J5/00B32B37/12B32B37/18B32B2605/00C22C18/04
Inventor 克里斯蒂安·阿莱雷阿斯特丽德·科菲尼-格雷瓜尔劳伦斯·道斯达特史蒂芬·莫雷尔
Owner ARCELORMITTAL SA
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