Galvanized vs. galvannealed 1

[btrueblood]

Is there any difference in corrosion protection for steel sheet hot-dip galvanized (zinc coated) vs. the heat-treated or "galvannealed" material that produces a zinc/Fe alloy at the surface? The environment is indoor and possibly outdoor on commercial buildings.

 

[CoryPad]

As long as they both have roughly equivalent thickness and zinc content, then there won't be much of a difference in the environments you describe.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[EdStainless]

Galvannealed used to be a trademark (Keystone wire?), but not any longer.
Functionally there is no difference that I have ever seen.

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