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Excessive Aluminum in Zinc

We have too much aluminum in our Zinc bath about .163 this was added as pure aluminum we have already taken out one third of the zinc and replaced it but we still have the same problem is there anything else we can try.

We are a general galvanizer and use a low fume flux.

Margaret Hutcheson
Galvanizing - Londonderry, Northern Ireland
2006

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As aluminium stays at the top of the kettle,by using your flux powder you can reduce your aluminium content to some extent, which you can throw on the kettle top and skim it off.

Regards,

S.R.Ameen
- Riyadh, Saudi Arabia
2006

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2006

I HAVE THIS PROBLEM SOME TIME AGO. ¿YOUR PROCESS IS CONTINUOUS OR BATCH? ¿IS WIRE OR STRIP?¿HOW MUCH ZINC HAVE THE BATH?
MAYBE YOU CAN PUT AN AIR LANCE INTO THE BATH(THE ALUMINIUM IS MORE REACTIVE AND WILL FORM OXIDE)
THERE IS ANOTHER "UNCONVENTIONAL" PROCESS THAT YOU CAN TRY: FOUND A BIG PIECE OF GREEN WOOD, AND PUT THIS UNDER THE ZINC. MAKE THIS WITH EXTREME CAUTION, THE GAS THAT COME FROM THE WOOD WILL OXIDIZE THE ALUMINIUM.I HOPE THIS CAN HELP YOU.

VICTOR MENDOZA
CALUR - CANELONES, URUGUAY

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Dilution is really your only choice here I think. Have seen a similar situation, and seen all manner of "old wives tales" tried, including coconut husks, potatoes, oxygen lancing, top skimming, etc.

Pump out and dilute with fresh zinc. (If you can find any of this increasingly rare commodity)

Geoff Crowley
Crithwood Ltd.
Westfield, Scotland, UK

2006