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topic 11009

Is it Galvanized or Galvannealed?


What is a simple way to tell the difference between metal that is galvanized or galvannealed?

Paul L [last name deleted for privacy by Editor]
- Manchester, Iowa

Handbook of Hot Dip Galvanization
from Abe Books



GALVANNEAL Carbon steel sheet with a fully alloyed iron-zinc coating on both sides. I don't know if you would consider it simple, but it may have a different galvanic potential compared to some electrode.

tom pullizzi portrait
Tom Pullizzi
Falls Township, Pennsylvania


Galvanizing, where 100% Zn on the top surface of the steel,where as in Galvannealed,90-93% Zn with 10-7% Fe on the top surface. The simple way to distinguish is that Galvannealed material will look like matte finish, where as Galvanized material will look like bright finish.

Tapan K Rout
- Jamshedpur, India

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