Hulan Wang as a protective product, due to long years in the outdoor use, how can a long time anti-corrosion has become a must solve the problem, in general, highway fence, rail fence currently all use the surface of galvanized main The method is hot galvanized, but there are some small factories using cold galvanized way, to tell you about what the difference between the two.

Hot galvanized in this way, is a relatively old method of galvanizing hair, since 1836 France has been hot galvanized applied to industry since, has been a seventy years of history.

Hot galvanized fence production process include: mesh preparation → pre-plating treatment → hot dip plating → post-plating treatment → finished product inspection. According to the habit of often according to the pre-plating method. We know that the fence as a protective product, because of the long-term use in the outdoors, how to be long. Between the anti-corrosion has become a must solve the problem, in general, highway fence, railway fence currently all The main method of surface galvanizing is hot-dip galvanizing, but there are some small plants using cold galvanized way.

Hot-dip galvanized out-of-line annealing: the fence mesh is re-installed into the hot-dip galvanizing line before the first annealing furnace or hood-type annealing furnace for recrystallization annealing, so that there is no galvanized line annealing The process. The mesh must be kept in the presence of a non-oxidizing and other dirt on the clean pure iron active surface before hot-dip galvanizing. This method is first by the pickling method of the annealed fence mesh surface of the surface oxide scale removed, and then coated with a layer of zinc chloride or by the mixture of ammonium chloride and zinc chloride to protect the solvent, thus Prevent the fence from being oxidized again.