Online switching method aluminum-zinc-magnesium coated steel plate and preparation method thereof
A coated steel plate, aluminum-zinc-magnesium technology, applied in the direction of coating, hot-dip coating process, metal material coating process, etc., can solve uneven spangles, corrosion resistance can not meet the strength requirements, and the combination of coating and substrate Low strength and easy to fall off, etc., to achieve good uniformity, reduce the link of zinc extraction, and reduce the effect of common defects
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Embodiment 1
[0045] Embodiment 1: Preparation of the Al-Zn-Mg coated steel sheet of the present invention
[0046](1) The equipment does not stop, add 2.2 tons of magnesium alloy ingot A to the 90 tons of zinc liquid in the main pot with a temperature of 593 ° C, melt for 72 hours, and obtain the mixed plating solution A; This pre-melting pot is communicated with the main pot, and is used for adding 55 tons of magnesium alloy ingot B and aluminum-zinc ingot (addition amount is to adjust the composition of the main pot plating solution to the following aluminum-zinc-magnesium in the main pot) The composition content percentage of the plating solution), melted for 72 hours, to obtain the mixed plating solution B; after mixing the mixed plating solution A and the mixed plating solution B uniformly, the aluminum-zinc-magnesium plating solution was obtained. Wherein, in terms of mass percentage, the zinc liquid contains: Al 53, Si≤0.2%, the balance being zinc and other unavoidable impurities. ...
Embodiment 2
[0050] Embodiment 2: Preparation of the Al-Zn-Mg coated steel sheet of the present invention
[0051] (1) The equipment does not stop, add 2.2 tons of magnesium alloy ingot A to the 90 tons of zinc liquid in the main pot with a temperature of 597 ° C, melt for 96 hours, and obtain the mixed plating solution A; This pre-melting pot is communicated with the main pot, and is used to add 55 tons of magnesium alloy ingots B and aluminum-zinc ingots (addition amount is to adjust the plating solution to the composition content of the aluminum-zinc-magnesium plating solution described below) in the main pot. ), melted for 96h to obtain the mixed plating solution B; after mixing the mixed plating solution A and the mixed plating solution B uniformly, the aluminum-zinc-magnesium plating solution was obtained. Wherein, in terms of mass percentage, the zinc liquid contains: Al 55, Si≤0.2%, the balance being zinc and other unavoidable impurities. In terms of mass percentage, the aluminu...
Embodiment 3
[0055] Embodiment 3: Preparation of the Al-Zn-Mg coated steel sheet of the present invention
[0056] (1) The equipment does not stop, add 2.2 tons of magnesium alloy ingot A to the 90 tons of zinc liquid in the main pot with a temperature of 592 ° C, and melt for 80 hours to obtain the mixed plating solution A; This pre-melting pot is communicated with the main pot, and is used to add 55 tons of magnesium alloy ingots B and aluminum-zinc ingots (addition amount is to adjust the main pot plating solution composition to the aluminum-zinc-magnesium plating solution described below) in the main pot. percentage of the composition content), melted for 72 hours, to obtain the mixed plating solution B; after mixing the mixed plating solution A and the mixed plating solution B uniformly, the aluminum-zinc-magnesium plating solution was obtained. Wherein, in terms of mass percentage, the zinc liquid contains: Al 53, Si≤0.2%, the balance being zinc and other unavoidable impurities. I...
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