Question

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the correct corrosion protection material to use during welding is:
epoxy primer.
seam sealer.
primer filler.
weld - through primer.

Explanation:

Weld - through primer is specifically designed to be used during welding. Epoxy primer is more for general corrosion protection before painting. Seam sealer is used for sealing seams, not for protection during welding. Primer filler is for filling minor imperfections. Weld - through primer can withstand the heat of welding and provides corrosion protection.

Answer:

Weld - through primer.