LameTrouT OP t1_isgicpz wrote on October 15, 2022 at 8:27 PM

Reply to comment by Br4veSirRobin in How come some Galvanized steel panel have patterns? by LameTrouT

I believe they must do this for hand rails ls that get a color after getting gavinized?

Br4veSirRobin t1_isgj7kg wrote on October 15, 2022 at 8:33 PM

The patterns on the surface of galvanized steel are called 'spangle'. People who use galv steel order spangle size. Antimony is used in the molten zinc bath for spangle size control among other process controls. Metallurgist here.

LameTrouT OP t1_isgnk26 wrote on October 15, 2022 at 9:04 PM

Wow thanks for this explanation and the terminology 👍👍👍👍

[deleted] t1_isgp5pi wrote on October 15, 2022 at 9:15 PM

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cr0n1c t1_ish88jy wrote on October 15, 2022 at 11:37 PM

So far down to find someone finally saying Spangle. Thank you.

Br4veSirRobin t1_isgirrk wrote on October 15, 2022 at 8:30 PM

True. Any painted galvanize is is usually galvanneal. I was a metallurgical engineer in both carbon steel and titanium.