Cold galvanized(galvanizing)

Cold galvanized(galvanizing) also called electro-galvanized cold galvanizing, which is the use of the pipe member through electrolysis degreasing, pickling, and put into a solution composed of zinc and a cathode connected to the electrolytic apparatus, placed opposite the tube member zinc plate, connected to the electrolysis the positive power equipment, the use of electric current from the positive to the negative directional movement will be in a layer of zinc deposited on pipe fittings, cold-plated fittings are galvanized after processing the first.

Cold galvanizing paint mainly through electrochemical principles for corrosion, it is necessary to ensure full contact of zinc powder and steel, generating electrode potential difference, so the steel surface treatment is very important.

Cold galvanizing process is used to protect the metal against corrosion, for the use of filler coatings of zinc, in the use of any method to a coating applied to the surface to be protected, the filler form zinc coating after drying, the dried coating having a content of zinc (95%). Suitable for repair work (ie work in the repair process, the only damage to the steel surface to be protected place, as long as the repaired surface can be re-coated).

Cold galvanizing process for a variety of steel products and structures corrosion. (Cold galvanizing is galvanized, galvanized rarely, and only 10-50g/m2, its own hot-dip galvanized corrosion resistance than a lot of difference. Using galvanized the price is relatively cheaper.

Weled steel pipe specification, Standard and identification

Welded steel pipe (steel pipe manufactured with a weld) is a tubular product made out of flat plates, known as skelp, that are formed, bent and prepared for welding.