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How about the corrosion resistance of galvanized sheet?

Update:Oct 25,2021
Summary:How about the corrosion resistance of galvanized sheet? Galvanized sheet is divided into oiled sheet, passivated sheet and passivated oiled sheet. Oil......
How about the corrosion resistance of galvanized sheet?
Galvanized sheet is divided into oiled sheet, passivated sheet and passivated oiled sheet. Oiling hardly helps the corrosion resistance, so only the corrosion resistance level of oiled sheet is about 2-8 hours of neutral salt spray level 9 (depending on different substrates). Generally, the passivated sheet is required to be at least 72 hours of neutral salt spray level 9 or above.
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