1. Main difference
Hot-dip galvanizing is to melt the zinc into a liquid state, and then immerse the substrate to be plated, so that the zinc forms an interpenetrating layer with the substrate to be plated, so that the bonding is very tight, and no impurities or defects remain in the middle of the layer, and the thickness of the coating is large, it can reach 100um, so the corrosion resistance is high, the salt spray test can reach 96 hours, which is equivalent to 10 years in the normal environment; while the cold galvanizing is carried out at normal temperature, although the thickness of the coating can also be controlled, but relative In terms of plating strength and thickness, the corrosion resistance is poor. The main differences between the two types of welded wire mesh are as follows:
(1) From the surface, the hot-dip galvanized welded wire mesh is not as bright and round as the cold-galvanized welded wire mesh.
(2) From the amount of zinc, the hot-dip galvanized welded wire mesh has a higher zinc content than the cold-galvanized welded wire.
(3) From the perspective of service life, the hot-dip galvanized welded wire mesh has a longer service life than the electro galvanized welded wire mesh.
2. Identification method
(1) Look with the eyes: The surface of the hot-dip galvanized welded wire mesh is not smooth, and there is a small zinc block. The surface of the cold-galvanized welded wire mesh is smooth and bright, and there is no small zinc block.
(2) Physical test: The amount of zinc on the hot-dip galvanized electric welding wire is > 100g/m2, and the amount of zinc on the cold-galvanized electric welding wire is 10g/m2.
Post time: Jun-21-2021