Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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Activating Alloy42
Is there a suitable chemicals to remove oxides layer of alloy42 oxides but not react with aluminium as a pretreatment of tin plating. Or is there a chemical to remove alloy42 oxidation layer and aluminum oxide during pretreatment of tin plating?
Yun Liu- Singapore
2002
citric acid ⇦this on eBay or Amazon [affil links] has been used to activate alloy 42. (usually followed by a nickel strikeNickel strike solution would attack aluminum, therefor cannot be used. citric acid will attack aluminum very slowly and may be suitable. Worth a try. There are proprietary citric acid activators for alloy 42 containing a small amount of a antifungal material. Try citric acid at 860 g/L and a temperature of 49 °C.
Don Baudrand
Consultant - Poulsbo, Washington
(Don is co-author of "Plating on Plastics" [on Amazon or AbeBooks affil links]
and "Plating ABS Plastics" [on Amazon or eBay or AbeBooks affil links])
2002
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