Cold Galvanized Steel Angles Customized For Industrial Structure Gi Sheet Price

Cold Galvanized Steel Angles Customized For Industrial Structure Gi Sheet Price

Cold Galvanized Angle Steel of Various Specifications

The cold galvanizing process is used to protect metals from corrosion. For this purpose, a coating of zinc filler is used, which is applied to the protected surface by any coating method and dried to form a zinc filler coating. In the dry coating Has a content of zinc (up to 95%). Suitable for repair work (i.e. during repair work, only where the protected steel surface is damaged, it can be re-coated as soon as the surface is repaired). The cold galvanizing process is used for the anticorrosion of various steel products and structures.

Product Description

Specifications : A36 Hot Rolled, G90 Galvanized coating.

Surface Finish : slightly shiny silver color, grainy and spackled surface

Mechanical Properties: Yield = 36K, Tensile = 58-80K

How to Measure: Leg (A) X Leg (B) X Thickness (C) X Length

Cold galvanized coatings are mainly used for anti-corrosion through electrochemical principles. Therefore, it is necessary to ensure that the zinc powder is in full contact with the steel, resulting in an electrode potential difference, so the surface treatment of the steel is very important. Before spraying cold galvanizing, mechanical rust removal (sand blasting, shot blasting, etc.) should be selected to make the surface cleanliness of the steel reach ISO 85O1-1 Sa 2.5, which is equivalent to GB 8923 Sa 2.5. Its text is defined as: "After the steel has been mechanically derusted, the surface is free of oil, rust, oxide scale and other dirt, or only slight traces are left; 95% of the steel surface is impacted by steel shot (sand) and exposed. Metallic sheen."

For another indicator of surface treatment quality - roughness, different cold galvanized materials have different requirements for roughness. In the construction instructions of Zinga, the average roughness Ra=12.5 is required, that is, the roughness Rz=55-75 microns. In the "Strong Zinc" and "Robalu" construction instructions, the requirements for roughness are slightly lower, Rz=40~60 microns.

If the cold galvanized film is formed separately, as the anti-corrosion coating, the surface roughness can be controlled to be slightly smaller to ensure the coating thickness of the cold galvanized coating; and when the cold galvanized coating is used as the bottom layer of the heavy-duty anti-corrosion coating, the total matching coating When the thickness is greater than 180 microns, in order to ensure the adhesion of the entire coating, the surface roughness Rz of the steel should be greater than 60 microns.