What is the appearance of hot galvanizing and cold galvanized flat steel?
Cold galvanizing is zinc plating, the amount of zinc plating is very little, only 10 - 50g/m2, and its corrosion resistance is much different from that of galvanized pipe. Regular galvanized pipe manufacturer, in order to ensure quality, most do not use electro galvanized (Leng Du). Only small enterprises with small equipment and old equipment use zinc plating, of course, their prices are relatively cheaper. At present, the Ministry of construction has officially completed the following, the elimination of backward cold galvanized pipe, the future is not allowed to use cold galvanized pipe for water, gas pipes.
The appearance of cold plating smooth point heat plating, there is also the difference between the two prices, if the project budget it is recommended to use a hot dip, if it is hot for outdoor plating relatively easy to rust, cold plating used in outdoor it is easy to rust, the appearance is not good, relatively Engineering the quality will also be questioned, if you can use the indoor cold plating, can save a lot of budget
There is no heat, heat processing process is differentDifferent galvanizing methods, such as hot dip plating or electroplating, etc.Finally, performance is different
The hot-dip galvanized pipe is an alloy layer that causes molten metal to react with the iron matrix, thus combining the substrate with the two coating. Hot dip galvanizing is the first steel pickling, in order to remove iron, steel pipe surface after pickling, cleaning by ammonium chloride or zinc chloride solution or ammonium chloride and zinc chloride aqueous solution tank, and then into the hot dip tank. Hot dip galvanizing has coatingThe utility model has the advantages of uniform force, strong adhesion, long service life, etc..
