Cold galvanizing and hot galvanizing

Hot-dip galvanized steel pipe is another name we often call the iron strapping. Zinc plating is an important process in the production of galvanized strapping. And we all know that galvanizing is divided into cold galvanizing and hot galvanizing. What is the difference between the two?

1.Hot-dip galvanizing, also known as hot-dip galvanizing, is the process of degreasing and derusting the workpiece to present a non-staining and wetting 4 in square tubing surface. It is immediately immersed in a plating tank which is previously melted by zinc and formed on the surface of the workpiece. A method of zinc plating. Cold-galvanizing is the process of immersing the workpiece, which has been degreased and decontaminated, into a special plating tank, and the anode is zinc. The method of turning on the direct current power source, the zinc ions on the anode migrate to the cathode, and discharging on the cathode, so that the workpiece is plated with a zinc layer of hot-dip galvanized steel strands.

2.The hot-dip galvanized coating is thicker, generally 30-60 microns, and the coating has high corrosion resistance. The cold galvanized coating is anti-corrosive by the electrochemical principle, so it is necessary to ensure sufficient contact between the zinc powder and the steel to produce an electrode potential difference.

In general, galvanized straps are hot-dip galvanized. Of course, some will choose cold galvanizing. The galvanizing method is different. Naturally, the use of natural straps will be slightly different, so we are choosing At the time of purchase, it is also necessary to pay attention to the price of hot-dip galvanizing is cheaper than electro-galvanizing.

Electroplated zinc has a better surface coating adhesion than hot-dip galvanizing. Hot-dip galvanized coatings are higher than electrogalvanized. Electrogalvanizing is normally 20g on one side. Hot-dip galvanizing is at least 30–40g.


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