Cold-rolled sheet
Cold-rolled sheet is a product made from hot-rolled coil
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The main reasons for zinc layer shedding are: Surface oxidation, silicon compounds, cold binding emulsion is too dirty, NOF oxidation atmosphere and protective gas dew point is too high, air fuel ratio is unreasonable, hydrogen flow rate is low, furnace aerobic infiltration, strip steel into the pot temperature is low, RWP section furnace pressure is low and furnace door suction, NOF section furnace temperature is low, Grease evaporation is not enough, the zinc pot aluminum content is low, the unit speed is too fast, the reduction is insufficient, the residence time in the zinc liquid is too short, and the coating is thick.
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