1. The cold and hot rolled steel plates are degreased by alkali washing, washed with water, dried and then annealed in a horizontal (vertical) heating furnace heated by radiant tubes, and a certain amount of hydrogen is introduced into the furnace to reduce the atmosphere in the furnace.
2. The steel strip heated to a certain temperature is immersed in zinc liquid for hot galvanizing under certain conditions.
3. The size of zinc flower is controlled by the composition of liquid zinc. At the same time, the forced cooling method is adopted. Before the zinc flower begins to spread, the small zinc flower products are rapidly cooled by small zinc flower equipment to prevent the zinc liquid from continuing to spread and form small zinc flower.
4. After hot dip galvanizing, after waiting for post cooling, finish the surface. Finally, according to the application, carry out surface passivation treatment respectively or directly produce the color coated coil board.

ZZ Can Serve as Your Single-Source Perforated Round Hole Metal Supplier

ZZ Steel offers perforated metal sheet in standard 60-degree staggered, 45-degree staggered and straight-line patterns. With a staggered option, the direction of the stagger typically coincides with the short dimension of the metal sheet, while a straight-line hole pattern is usually parallel to the long dimension.
You can find perforated metal sheets made from a wide assortment of top-quality materials, including carbon steel, stainless steel 304, galvanized metal and aluminum.