Alclad is a type of corrosion-resistant aluminum sheet commonly used in aircraft construction. It is manufactured by bonding a thin layer of pure aluminum to a core of high-strength aluminum alloy. This combination provides the structural strength of the alloy core while benefiting from the corrosion resistance of the pure aluminum surface. Alclad materials are favored in the aerospace industry due to their durability, lightweight properties, and enhanced resistance to environmental factors such as moisture and chemicals. While not a cybersecurity term, understanding materials like Alclad is important in the context of physical security and the protection of sensitive electronic components housed within aircraft or secure enclosures.