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topic 59070

Ultrasonic cleaning prior to hot dip galvanizing



November 30, 2012

Q. Dear All,

We are trying to develop ultrasonic cleaning system to clean nails / fasteners (mild steel wire) prior to hot dip galvanizing. We would like to do this without alkali degreasing or acid pickling.
What are the chances of getting a good finish product without surface imperfections?
What type of aqueous solutions to be used ?

Please suggest

Murali

Murali R
- Chennai, Tamil Nadu, India


November 30, 2012

A. Hi Murali. Close to zero in my estimation, but I'd like to hear from others.

Regards,

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey


December 3, 2012

For hot dip galvanizing -- an alloying reaction not a coating system -- you need chemically clean steel.

Ultrasonic cleaning might clean grease, oil, dirt, but will it remove millscale and rust, to leave chemically clean steel?

I don't think so.

geoff_crowley
Geoff Crowley
Crithwood Ltd.
supporting advertiser
Westfield, Scotland, UK
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