Do you know how to distinguish and distinguish cold galvanized, I will introduce it to you in detail today.
First of all, the difference in process is:
Cold galvanizing is the use of electrolytic equipment to degrease and pickle the workpiece into a zinc salt solution, and connect the negative electrode of the electrolytic equipment; place a zinc plate on the opposite side of the workpiece to connect the positive electrode of the electrolytic equipment, and switch The power source uses the current to move from the positive electrode to the negative electrode, and a layer of zinc is deposited on the workpiece.
The difference in appearance: The appearance of electroplated zinc is relatively smooth and bright, and the electroplated layer using the color passivation process is also yellow-green as the main color, which is colorful. The white passivation plating layer is blue-white or white is green, and the white passivation plating is slightly colorful at a certain angle with the sun. It is easy to produce "electric burning" at the corners of complex workpieces and become dark. The zinc layer in this part is thick. The dead corner of the current is easy to form at the corner area, and a dark area of undercurrent is generated, and the zinc layer in this area is thin. The whole workpiece is free of zinc knobs and agglomeration.
Difference between finished products
2. The cold-plated layer is uniform and the thickness is very thin; the hot-plated layer is thick and the thickness is uneven.
3. The appearance of cold plating is bright, and the color of hot plating is dark.
4. The cold-plated layer is relatively thin and has poor corrosion resistance; the hot-plated layer is several tens of times cold-galvanized because of its thickness, and forms an infiltration layer with the base metal, which has good corrosion resistance.
5. Cold galvanized steel pipe looks brighter and smoother.
After reading the above content, do you know how to distinguish it, and you want to know more about it, so stay tuned.