The first corrosion that occurs during the entire life […]
The first corrosion that occurs during the entire life cycle of galvanized steel wire is the oxidation of the surface galvanized layer. After the "white rust" is formed, the "white rust" on the surface further reacts with the impurity gas such as carbon dioxide in the humid air to form a "black spot". When the galvanized steel wire is used for a long time, the galvanized layer is corroded. After the more serious, the steel matrix loses the "sacrificial corrosion" effect of zinc, and it begins to oxidize and becomes "red rust".
Color coated plate, color steel plate, color coated roll, color steel coil Once the steel substrate begins to oxidize, the corrosion rate becomes very fast, and the service life of the galvanized steel wire is over.
In addition, there are two special corrosion conditions called "blackening" for galvanized steel wire. One is that after the galvannealed steel wire is used for a period of time, due to the influence of elements such as lead in the aluminum-zinc-plated layer, the aluminum-plated zinc layer on the edge of the crystal lattice of zinc and lead crystallizes is still blackened. It has a protective effect, but it has a certain impact on life.