Large coils of galvanized wire can be divided into hot dip galvanized wire and cold galvanized wire, the difference between the two lies in the way of zinc and zinc quantity. Hot dip galvanized steel wire is soaked in molten zinc, hot dip galvanized zinc fast, zinc layer thick rust performance is very good, but the zinc is not uniform, and the surface is dark, hot dip galvanized life can reach 20 years.
Cold galvanizing is also called, galvanized steel wire is be placed in plating bath, by unidirectional current slow metal surface of galvanized, electric galvanized zinc is slow, and for hot dip galvanized thickness is one over ten, zinc thin so not good rust resistance, placed in the outdoor is usually a few months will rust, applied generally in the outdoor in the plastic bag.
Change is to pull hot dip galvanized wire or cold galvanized wire secondary processing, change after surface smooth and shiny, pull and tensile resistance stronger, which is not easy to produce fracture, is often used to screen industry will change to pull, now you can have the effect of improving quality, the other clothes-horse, communication, high tension line will change drawing processing, to prevent the fracture.
Strength of galvanized wire: tensile strength is the tensile stress that the material can withstand before tensile fracture; There are two indexes of yield strength, upper yield and lower yield. It refers to the process in which the stress does not increase while the deformation continues to occur in the tensile process. When the force value drops for the first time, the large stress is the yield strength, and the yield strength is necessarily less than the tensile strength value.
Non-proportional elongation strength: it is mainly for hard steel without yield point. The stress that the residual elongation of the standard distance reaches 0.2% of the length of the original standard distance is defined as the specified non-proportional elongation strength.
Galvanized parts to be plated: the surface of the parts to be plated should be smooth, and there is no acid pickling method can not remove the pollution. Such as paint, grease, cement, asphalt and excessive rotten harmful substances; All welds of welded members shall be sealed without air; Pipes and containers must have holes for exhaust and zinc intake; The workpiece shall be finished welded steel pipe without thread, if thread shall be protected.
Post time: 28-02-22