black annealed tie wire

1. Pickling treatment: the steel wire is soaked in an acidic solution to remove the oil stains and oxidation layers on the surface to ensure the adhesion of the zinc layer.

When this ore is specially refined into metallic iron, carbon, silicon, manganese, and other elements are added to it, so that the refined material is called general pig iron, which is also the material for the initial grade. According to the different requirements of the industry, different weights of alloy ingots are prepared in the smelting furnace according to the standard, such as weaving, Ming, paper, Lang, silicon, etc., and this smelting material is called combined gold ore.