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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Sodium Dichromate Dihydrate contamination in Cadmium plating vat
We have accidentally added 2.5 kg of Sodium Dichromate Dihydrate (part of the Chrome passivation makeup)to our high strength steel Cadmium plating vat (500l vat.). Could anyone offer advice on:- The effect on plating and or methods of treating the vat to either complex out the Chromium (i guess this is the problem) or try to preferentially plate it out.
Regards,
Aerospace - Bristol , UK
2006
Oops. That's a lot of hex chrome. You're pretty much SOL. Dump the bath and replace it.
Jeffrey Holmes, CEF
Spartanburg, South Carolina
2006
2006
For aerospace work you really have no option but to change the bath.
Would you fly in an aircraft with parts plated in that brew?
Geoff Smith
Hampshire, England
SOD.HYDROSULFITE/SOD.METABISULFITE/SOD.BISULFITE.
EXACT AMOUNT SHOULD BE DETERMINED IN HULL CELL. THEN ADDED TO BATH.
REGARDS,
Ajay Raina
Ludhiana, Punjab, India
2006
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