finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics
topic 4243

Weld seam and edge of galvanneal steel.


(2000)

How to protect or restore the galvanneal coat after welding. The coat must be galvanneal, not metal Zn?

Also, is there any way to minimize area of unprotected steel on the cut edge of the galvanneal sheet?

Boris Yuriditsky
- Baltimore, Maryland


(2000)

Well, galvanneal is designed to be painted, not used as a finished surface. So, are the unprotected edges, and the welded areas, really a concern if you are going to paint the object anyway?

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey


(2000)

Galvanneal is more of a process than the coating itself, the galvanized surface is a high zinc alloy that has been pickled, heated, and cooled quickly in a non-oxidizing atmosphere. To restore that, you have to repeat the process. It depends on the performance needs for your part how you repair the welded area, if you are applying zinc phosphate over it before painting then its probably OK without anything else. If the performance demands are extreme you may have to re-apply the coating, there are a few ways to do that, none of them high production. Tube mills use a spray of zinc powder onto the welded area just after welding to replace the galvanizing, you could check into something like that...

Jeff Watson
Jeff Watson
- Pearland, Texas



This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices


©1995-2018 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.