I believe that many customers will encounter a problem when purchasing welded wire mesh, that is, do they need hot-dip galvanizing or cold-dip galvanizing? So why do manufacturers ask this kind of question, what is the difference between cold galvanizing and hot galvanizing? Today I will explain it to you.
Hot-dip galvanized welded wire mesh is to galvanize the welded wire mesh under heating. After the zinc is melted into a liquid state, the welded wire mesh is immersed in it, so that the zinc will form interpenetration with the base metal, and the combination is very tight, and the middle is not easy. Other impurities or defects remain, similar to the melting of two materials at the coating part, and the thickness of the coating is large, up to 100 microns, so the corrosion resistance is high, and the salt spray test can reach 96 hours, which is equivalent to 10 in the normal environment. years - 15 years.
The cold galvanized welded wire mesh is electroplated at room temperature. Although the thickness of the coating can also be controlled to 10mm, the bonding strength and thickness of the coating are relatively low, so the corrosion resistance is not as good as Hot-dip galvanized welded mesh.
So if we buy it, how to distinguish it? Let me tell you a little method.
First of all, we can see with our eyes: the surface of hot-dip galvanized welded wire mesh is not smooth, there are small zinc lumps, the surface of cold-galvanized welded wire mesh is smooth and bright, and there are no small zinc lumps
Secondly, if it is more professional, we can pass a physical test: the amount of zinc on the hot-dip galvanized welded wire mesh is > 100g/m2, and the amount of zinc on the cold-dip galvanized welded wire mesh is 10g/m2.
Well, that’s the end of today’s introduction. Do you have a deeper understanding of hot and cold galvanized welded wire mesh? I believe this article can answer some of your doubts. Of course, if you have any questions, you can also You are always welcome to get in touch with us, we are very glad that we can help you.
