the control of Al content in liquid zinc is very important in hot dip galvanizing line, if you want to start such a project, you should know the details.
Effect of Al:
1. Inhibit the reaction of iron and zinc
After the strip steel enters the liquid zinc, aluminum reacts with iron to form a dense iron-aluminum compound film, which inhibits the diffusion of iron to the zinc solution and thus hinders the formation of iron-zinc compound.
2. Improve the adhesion of zinc layer
The formation of iron and aluminum compounds plays a role in the media, so that the strip and coating can be more closely combined together, so as to improve the stamping forming performance of galvanized sheet, during deformation will not cause coating off.
3. Al is beneficial to the removal of zinc slag.
4. Al can improve the uniformity of galvanized sheet
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