Cupal - CuAl - %99,5 Al / %99,9 Cu, 1mm thickness , one side Aluminium - other side copper
Bimetal washers to prevent bimetallic galvanic electro-corrosion at copper and aluminium joints.
Cupal consists of copper sheet claded on pure aluminium, both metalsbeing diffused together to form an inseparable whole by roll bonding process. Cupal, is therefore not an alloy and the copper laters are not Electroplating but are ather mechanically welded to Aluminium sheets.
When Cupal bimetal is placed between Aluminium Terminal and Coper Terminal, bimetallicgalvanic corrosion is averted due to absence of air in Cupal bimetal.
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