Galvanized wire is divided into hot-dip galvanized wire and cold galvanized wire (electric galvanized wire) the difference is: hot-dip galvanized wire is dipped in the zinc solution of heating melting, the production speed is fast, and the coating is thick but not uniform. The color is dark, the consumption of zinc metal is more, the infiltration layer is formed with the base metal, the corrosion resistance is good, and the hot dip galvanizing can be maintained for decades in the outdoor environment.
Cold galvanizing (galvanizing) is in the plating tank through the current one-way to gradually plating zinc on the metal surface, the production speed is slow, the coating is uniform, the thickness is thin, usually only 3-15 microns, the appearance is bright, poor corrosion resistance, generally a few months will rust. Compared with electro galvanizing, hot-dip galvanizing has lower production cost and less impact on the environment than electroplating.
Application of hot dip galvanizing: Because the resulting coating is thicker, hot dip galvanizing has better protective properties than electric galvanizing, so it is an important protective coating for steel parts used in harsh working environments. Hot-dip galvanized products are widely used in chemical equipment, petroleum processing, Marine exploration, metal structure, power transmission, shipbuilding and other industries, in the agricultural field such as pesticide sprinkler irrigation, heating and construction such as water and gas transmission, wire bushings, scaffolding, Bridges, highway guardrail and other aspects, in recent years has been widely used.
Hot-dip galvanized wire is also called hot-dip galvanized wire and hot-dip galvanized wire, which is produced by wire rod through drawing, heating, and then drawing, and zinc coating on the surface through hot plating process. The amount of zinc is generally controlled in the scale of 30g/m^2-290g/m^2. Used in various industries of metal structure equipment. It is to immerse the steel parts after rust removal into the melted zinc liquid at about 500 ° C, so that the surface of the steel members is attached to the zinc layer, and then play the intention of anti-corrosion.
Hot dip galvanized wire is dark in color, the demand for zinc metal consumption is more, its corrosion resistance is good, the galvanized layer is thick, and the hot dip galvanized can persist for decades in the outdoor environment. Pretreatment of hot-dip galvanized wire is the base of electroplating and the key to ensure product quality, and the coated substrate is not treated to the requirements of the rules before electroplating. Hot-dip galvanized wire before electroplating not only to remove the grease on the base metal and affect the coating adhesion and other quality requirements of foreign matter, but also to remove its surface oxide.
Post time: 08-06-23