In Alclad 2024-T4, the surface layer is made of which material?

In Alclad 2024-T4, the surface layer is made of which material?

• A. commercially pure aluminum
• B. heat-treated aluminum alloy
• C. strain-hardened aluminum alloy
• D. aluminum oxide

Answer: (A)

The surface layer in Alclad is a thin skin of commercially pure aluminum added to the strong core alloy to improve corrosion resistance. In Alclad 2024-T4, the core is the high-strength aluminum-copper-magnesium alloy in T4 temper, while the outer layer is essentially pure aluminum. This pure aluminum skin shields the core from corrosion and forms a protective oxide film, without being a heat-treated or strain-hardened version of the core alloy. It is not aluminum oxide itself as the clad layer, but metallic pure aluminum. So, the surface layer is commercially pure aluminum.

The surface layer in Alclad is a thin skin of commercially pure aluminum added to the strong core alloy to improve corrosion resistance. In Alclad 2024-T4, the core is the high-strength aluminum-copper-magnesium alloy in T4 temper, while the outer layer is essentially pure aluminum. This pure aluminum skin shields the core from corrosion and forms a protective oxide film, without being a heat-treated or strain-hardened version of the core alloy. It is not aluminum oxide itself as the clad layer, but metallic pure aluminum. So, the surface layer is commercially pure aluminum.