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Old December 10, 2012, 04:20 PM   #6
Bill DeShivs
Senior Member
Join Date: April 7, 2006
Posts: 7,786
Usually a zincate coating is applied to the aluminum to prevent oxidizing. The slightly acidic nickel solution eats the zincate away, exposing fresh aluminum and plating it.
Bill DeShivs, Master Cutler
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