Coat-Plating Methods of Galvanized steel Pipes
Hot dip galvanizing can protect steel pipes very well. When zinc is in liquid state, plate the steel with a thick layer of pure zinc after the complicated physical and chemical interaction and thus will make the hot dip galvanizing come into being. Also a zinc and steel alloy layer will be generated during this process. With this kind of layer and corrosion resistance feature, galvanized pipes can be applied to different severe corrosion environments, such as strong acid, alkali frog, etc., which is incomparable to other electro galvanizing.
Advantages of hot dip zinc galvanized pipes：
First, in general atmosphere, a very thin and dense layer of zinc oxide will be formed on the surface of zinc coating. It is hard to dissolve in water, therefore plays a certain protective effect to steel substrate. So, if the surface of steel pipe is covered with a quite thick and dense pure zinc layer, the steel substrate will be protected from contacting with any corrosive solution and avoid erosion.
Second, galvanized connection is very strong. When dissolving zinc and iron together, a good wear resistance will come into being and it can help the steel pipe become more strong and durable.
Third, after hot dip galvanizing, the mechanical properties of steel pipes will be improved effectively. Also, it can eliminate the stress of steel pipes in molding and welding process and benefit the lathe work.
Forth, due to the excellent ductility of zinc, its alloy layer can combine strongly with steel pipe so that plating will be protected from damage even in rolling, bending, wiredrawing, cold blanking and other molding situations.
What’s more, the surface of galvanized pipe will become bright and beautiful after the hot dip galvanizing.
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