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topic 9811

Floating dross


(2001)

Dear Sir/s:

We operate a 3000kg electric heated kettle for hot dip galvanizing. We use only SHG ASTM B6-12 [link by ed. to spec at TechStreet] zinc.

Our problem is related to heavy dross protrusions on the galvanized part surface. Some parts are almost completely covered by dross protrusions.

It seems that all the dross it's spread through the bath.

We were used to remove the dross daily, but sometimes this in not possible, due to the dross is floating.

I'm waiting for some help.

Thank you,

SÌlvio JosÈ Grando
Forjasul Canoas S.A. - Canoas, RS, Brazil

(2004)

Dear Sir,

Your problem of zinc dross in the kettle of 3000kg zinc is the problem of temperature is so high please mention to me what you use parts to galvanizing . you must keep the temp at 450 to 500 c.

Best regards,

Mehmet Baalbaki
- Istanbul, Turkey



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