Aluminium alloy plate, bonded body using the same and vehicular member

Abstract

An aluminum alloy plate, a bonded body using the same and a vehicular member are provided. Even if the aluminum alloy plate is in a high-temperature moist environment, a phenomenon of interface peeling at a jointing interface of an adhesive is difficult to occur, thereby improving adhesive durability and preventing the reduction of adhesive strength. The aluminum alloy plate (10) comprises an aluminum alloy base plate (1) and a surface oxide film (2) formed on a surface of the aluminum alloy base plate (1). The surface oxide film (2) includes 0.01-10 atomic% of zirconium and 0.1-10 atomic% of magnesium.

Description

technical field [0001] The present invention relates to an aluminum alloy plate, and in particular, to an aluminum alloy plate suitable for vehicles such as automobiles, ships, and aircrafts, especially an automobile panel, a bonded body using the same, and an automobile part. Background technique [0002] Currently, various aluminum alloy sheets are widely used as parts of transport aircraft such as automobiles, ships, and aircrafts, depending on the characteristics of each alloy. Especially aware of recent CO 2 Global environmental issues such as emissions are being sought to improve fuel consumption by reducing the weight of components, and the specific gravity is about 1 / 3 that of iron, and the use of aluminum alloy plates with excellent energy absorption is increasing. [0003] For example, examples of aluminum alloy sheets used as automotive parts include magnesium-containing aluminum alloy sheets such as JIS 5000-series Al-Mg-based alloy sheets and JIS 6000-series Al...

AI Technical Summary

Problems solved by technology

[0004] On the other hand, automotive parts made of aluminum alloys joined by adhesives have a problem that, during use, moisture, oxygen, chloride ions, etc. infiltrate into the joints, and the interface between the adhesive layer and the aluminum alloy plate gradually becomes weaker. Deterioration, resulting in interfacial peeling and reduced adhesive strength

However, in a high-temperature humid environment (degraded environment) in which moisture, oxygen, chloride ions, etc. permeate, Cu, which is an alloy component, concentrates on the oxide film-removed surface, and the adhesive bond layer deteriorates rapidly due to this Cu. Phenomenon of copper damage

As a result, there is a problem that moisture or the like penetrates into the matrix (substrate) of the aluminum alloy plate, and the interface degrades to cause interface peeling, resulting in a problem that the adhesive strength decreases.

[0010] In addition, in the method of anodizing, in order to prevent interface deterioration and peeling, it is necessary to form a thick oxide film with a surface morphology for sufficiently improving adhesion durability, so it takes a long time to form a thin film. The problem of low production efficiency

[0011] In addition, in the methods of warm water treatment described in Patent Documents 2 and 3, although the initial adhesive strength and the secondary adhesive force after wetting are improved, there is the following problem: in a high-temperature humid environment, due to the interface Hydration and dissolution of the base material lead to further deterioration of the interface, separation of the interface, and decrease in bonding strength

Images