How many types of galvanizing are there for waterproof casing?

Zinc waterproof casing is divided into two categories: hot-dip galvanizing and phosphating treatment. Zinc waterproof casing is divided into two categories: hot-dip galvanizing and phosphating treatment. Hot-dip galvanizing is thin and thick, with the advantages of uniform plating, strong adhesion and long service life. Phosphating treatment low cost, the surface layer is not very bright, its corrosion resistance is much stronger than the hot dip galvanized pipe. In the case of a small total number of models and specifications, the price of waterproof casing made of galvanized steel pipe is higher immediately, which in turn causes expensive production costs. It is proposed that we apply manufactured products according to the specific situation. After the casing production and processing of the second hot dip galvanizing method .
Hot dip galvanizing, also known as hot dip galvanizing, first pickling the plated parts to remove the oxidation layer on the surface of the plated parts, to provide conditions for the firm adhesion of the plating, ammonium chloride or zinc chloride helper cleaning, further removal of surface impurities, and then put into the hot dip plating bath of zinc by immersion to make the zinc uniformly and densely adhered to the plated parts, the formation of the plating.
There are two types of phosphating treatment.
Chemical phosphating: the workpiece is immersed in phosphating solution, relying on chemical reactions to achieve phosphating, widely used.
Electrochemical phosphating: in the phosphating solution, the workpiece is connected to the positive electrode, the steel is connected to the negative electrode for phosphating.