Galvanized steel coil is defined as a carbon steel sheet coated with zinc on both sides. Continuous hot dipping, or electro-galvanizing are the two processes used to produce galvanized sheet and coil. Generally speaking, the hot dip process consists of passing the steel through a bath of molten zinc. The electro-galvanizing process consists of the application of zinc by electrolytic disposition. The result is a layer of zinc tightly adhering to the base metal through an iron-zinc bonding layer.
A zinc coating is one of the most effective and economical methods of protecting bare steel from a corroding environment. The zinc not only serves as a barrier between the steel and the environment, it will sacrifice itself to protect the underlying steel sheet. Sacrificial, or galvanic protection occurs when two dissimilar metals are in contact and coupled with water and oxygen. Zinc corrodes preferentially to the iron in steel. This protection prevents corrosion of the steel at areas not covered with zinc. Thus, the spread of corrosion from cut edges, drill holes, etc. is minimized.
Galvannealed is a form of hot-dipped galvanized sheet consisting of an iron-zinc alloy coating on both sides. It is produced from Cold Rolled coil (or Hot Rolled Pickled & Oiled typically thicker than 14-gauge) that has been passed continuously through a pot of molten zinc. The coating amount applied to the surface is controlled by wiping, rollers and/or air jets. When the coil exits the zinc bath, the molten zinc is subjected to inline annealing that forms the zinc-iron alloy layer. It is subsequently run through leveling rolls for shape correction. The coating is denoted by an designation, i.e., A60. Galvannealed has a uniform light-medium gray color and a semi-porous finish. Galvannealed is especially intended for painting applications. Compared to regular hotdipped Galvanized, it has better corrosion resistance and a harder coating that is more resistant to scratching.
Chief Attributes:
| Thickness | 0.15mm - 3.50 mm |
| Width | 1580mm remaining |
| Inner diameter | 200 / 325 / 400 / 508 / 610 mm |
| Outer diameter | 2000 mm Max |
Galvanized Steel Strips that we offer in the market is fabricated using high grade steel. GI Steel Strips provided by us are obtainable at most economical prices.
Key Features:
| Thickness | 0.15mm - 3.50 mm |
| Width | 1580mm |
| Inner diameter | 200 / 325 / 400 / 508 / 610 mm |
| Outer diameter | 2000 mm Max |
| DesignationType | KS D 3506 | JIS G 3302 | ASTM | EN | |||
| cold-rolled base metal used | hot-rolled base metal used | cold-rolled base metal used | hot-rolled base metal used | OLD | A653-97 | ||