Galvanized Steel Sheet Manufacturing Process

Some drinking water pipes are still made from galvanized steel.

Galvanized steel sheet manufacturing process.

Hot dip galvanization is a form of galvanization it is the process of coating iron and steel with zinc which alloys with the surface of the base metal when immersing the metal in a bath of molten zinc at a temperature of around 449 c 840 f. An organic inorganic or organic inorganic hybrid film is applied to the surface of sheet steel in order to supplement its corrosion resistance and to enhance desirable properties such as resistance to fingerprint marks and workability. Hot dipped galvanized steel sheet in coil is cold rolled steel coil coated with zinc on two sides by a continuous hot dip process. In a non oxidative atmosphere and dipping the nickel coated steel sheet into a molten zinc bath containing aluminum at a content of from 0 1 to 1.

Sheets process center conventional galvanized steel prior art date 1945 11 26 legal status the legal status is an assumption and is not a legal conclusion. When exposed to the atmosphere the pure zinc zn reacts with oxygen o 2 to form zinc oxide which further reacts with carbon dioxide co 2. Cool rolled sheet metal is also frequently galvanized. The hot dip process consists of submerging the carbon steel into a molten zinc bath approximately 680 degrees fahrenheit.

The continuous hot dip coating process according to astm a653 specification for steel sheet zinc coated galvanized or zinc iron alloy coated galvannealed by the hot dip process is a widely used method to coat sheet products prior to fabrication. Galvanized steel is a carbon steel that has been coated with zinc. Nuts bolts tools and wires of all kinds are now galvanized because it is a cheap process and helps boost the metal s lifespan. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed expired lifetime application number us630907a inventor nicholas p veeder.

Galvanized steel in particular is often what is used in modern steel frame buildings. The manufacture of rolled galvanized color coated steel sheet. The most common method of zinc coating is the hot dip process. This method tightly adheres the coating to the steel with an iron zinc alloy bonding layer formed by a diffusion process while the heated steel strip is in contact with the molten zinc.