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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

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

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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November 30, 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
Crithwood Ltd.
Westfield, Scotland, UK

December 3, 2012

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