It means the model or material of a general galvanized sheet coil. At present, the common galvanized coil models on the market are SGCC, which are Japanese standards (Japanese standards) DX51D and DC51D. These two are European standards.
Single-sided galvanized sheet is a product that is hot-dip galvanized on only one side. In terms of welding, spraying, rust prevention, production and processing, it has stronger adaptability than double-sided galvanized sheets. In order to get rid of the defect of not being coated with zinc on both sides, there is another kind of galvanized sheet that is coated with chromatographic zinc on the other side, that is, double-sided galvanized sheet.
Single-sided zinc layer is a hot-dip galvanized sheet with a certain thickness of zinc layer on one side but not hot-dip galvanizing on the other side. The manufacturing methods of single and double-sided hot-dip galvanized sheets include zinc-repellent method, immediate method, indirect method and two-layer separation method. Single-sided and double-sided hot-dip galvanized sheets are suitable for the automotive industry. The surface with zinc layer is anti-corrosion, and the surface without zinc layer is good for welding.
The vertical zinc pot designed using the magnetohydrodynamic model closed type (NHD) created by the electromagnetic moving field can remove the components in the original zinc pot to achieve high speed, no zinc slag, environmental protection and energy saving, and improved zinc layer technology performance advantages.
When the liquid Zn (or Al, ZnAl) alloy is discharged from the bottom pot and enters the MHD channel to a certain depth (this depth depends on the metal liquid ratio, liquid level height, current size and other factors), due to the communication switch The generated external electromagnetic moving field generates an induced electromotive force in the zinc liquid. The interaction between this current and the external magnetic field creates a magnetic force, which acts on the fluid mechanics of the metal to move it upward.
Therefore, the zinc liquid cannot be discharged from the opening of the bottom pot. When the steel chain enters the zinc pot from the bottom channel, the zinc liquid is always in the same position at the channel, and there should be no steel parts in the zinc pot.
