Question 1

Is GI enough near the sea?

Accepted Answer

Sometimes with good design; aggressive zones may need duplex or stainless transitions — engineer decides.

Question 2

Can I paint over galvanizing?

Accepted Answer

Yes with correct pretreatment (often T-wash or sweep blasting per system); follow paint vendor data sheets.

Question 3

What causes white rust on stored GI?

Accepted Answer

Wet stacking and poor ventilation — separate bundles, drain, and ventilate stores.