Galvanized channel steel

Hot-dip galvanized channel steel can be divided into hot-dip zinc channel steel and hot-blow galvanized channel steel according to the different galvanizing process. It is to dip the steel parts after rust removal into the melting zinc liquid about 440~460℃, so that the surface of the steel members is attached with zinc layer, so as to play the purpose of anticorrosion.

Hot dip galvanized channel steel

The main method of surface galvanizing of channel steel is hot dip galvanizing. Hot dip galvanizing is developed from the older method of hot plating and has a history of 170 years since it was applied to industry in France in 1836. However, in the past 30 years, with the rapid development of cold rolled strip steel, hot dip galvanizing industry has been developed on a large scale.

Hot dip zinc is one of the best coating methods for protecting steel substrate. It is in the liquid state of zinc, after quite complex physical and chemical action, not only on the steel plating thicker pure zinc layer, but also generate a zinc iron alloy layer. This plating method not only has the characteristics of corrosion resistance of galvanizing, but also has the zinc-iron alloy layer. It also has a strong corrosion resistance that can not be compared with galvanizing. Therefore, this plating method is especially suitable for all kinds of strong acid, alkali fog and other strong corrosion environment.

characteristic

(1) With a thick dense pure zinc layer covering the surface of the steel, it can avoid the steel matrix and any corrosion solution contact, protect the steel matrix from corrosion. In the general atmosphere, the surface of the zinc layer forms a very thin and dense zinc oxide layer surface, it is difficult to dissolve in water, so it plays a certain protective role on the steel matrix. If zinc oxide and other components in the atmosphere to form insoluble zinc salt, corrosion protection is more ideal.

(2) With iron - zinc alloy layer, compact, in Marine salt spray atmosphere and industrial atmosphere performance unique corrosion resistance;

(3) Due to the firm combination, zinc-iron miscible, with strong wear resistance;

(4) Because zinc has good ductility, its alloy layer and steel base firmly attached, so hot plating parts can be cold stamping, rolling, drawing, bending and other forms without damaging the coating;

(5) After hot-dip galvanizing of steel structural parts, it is equivalent to a single annealing treatment, which can effectively improve the mechanical properties of steel matrix, eliminate the stress during forming and welding of steel parts, and is conducive to the turning of steel structural parts.

(6) The surface of the parts after hot dip galvanizing is bright and beautiful.

(7) Pure zinc layer is the most plastic layer of hot dip galvanized layer, its properties are basically close to pure zinc, ductility, so it is flexible.

Scope of application

The application ofhot-dip galvanized channel steel  expands with the development of industry and agriculture. Therefore, hot-dip galvanized products in buildings (such as: glass curtain wall, power tower, communication grid, water and gas transmission, wire casing, scaffolding, housing, etc.), Bridges, transportation; Industries (such as chemical equipment, petroleum processing, ocean exploration, metal structures, electric power transmission, shipbuilding, etc.); Agriculture (such as sprinkler irrigation, heating house), etc., has been widely used in recent years. Hot-dip galvanized products are more and more widely used because of their beautiful appearance and good corrosion resistance.