Alclad [alklad] [eng. Alclad, al(uminium)-aluminum and clad-clad]-a semi-finished product (sheet, pipe) made of strong aluminum alloys covered (plated) with a layer of pure aluminum (plated) by 2-5% (sometimes up to 10%) of its thickness. . Alloys in the aluminum-magnesium-zinc-copper system are plated with aluminum-zinc (1%) alloy, which has a more negative electric potential than the main alloys. As a result of plating, alloys are electro-chemically protected from corrosion.
Ex. Alclad provides electrochemical protection for aluminum alloys through a layered application of pure aluminum, safeguarding against corrosion.