-- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing.
    no popups, no spam
on this site
current topics
topic 2607

Powdercoating galvanised steel


Galv steel that I receive for powdercoating comes in various shades - from dull matte grey to highly spangled shiny almost silver. All suppliers say that the galv isn't passivated - so why the difference?   Can you recommend a book on galvanising for associated industries - something that will give me an idea of the basic process as it may affect a secondary finishing process such as powdercoating.   Looking forward to a reply    

Richard Besant General Manager.
ESP Powdertech, Corby England


Get in touch with the American Galvanizers Association. They have a number of free publications that are available online about galvanizing and its issues.

Hope that helps...

Craig Burkart

Craig Burkart signature
Craig Burkart
- Naperville, Illinois


The condition you refer to is the development of the spangle in the galvanized coating. This is primarily a function of coating thickness and cooling rate of the coating after galvanizing (things like alloy content, etc, also have an effect). The american galvanizers is a good source of information in general, but you may also want to talk with the producing companies as well. If you are buying through a service center (or a mill) you may wish to specify the spangle for your operation. If you are painting or powder coating, a minimized spangle or no-spangle (dull grey) may be desired, but this will be determined by your needs.

ray szkola
- fabricated products

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, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.