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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
(Ted can offer longterm or instant help)
finishing.com - Pine Beach, New Jersey
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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