Galvanized Steel Products
Electrogalvanized (EG), hot-dipped galvanized (HDG or GI), galvannealed (GA) and galvalume (GM) are cold rolled carbon steel coated with a zinc- or aluminum-based substance for corrosion resistance. The coating serves as a sacrificial anode, so that it cathodically protects exposed steel. This means that even if the coating is scratched or abraded, the exposed steel will still be protected from corrosion by the remaining zinc – an advantage absent from paint, enamel, powder coating and other methods.
Galvanized is used widely in the automotive, construction and appliance sectors for products that are exposed such as roofing, siding, ceiling systems, HVAC ducting, electrical boxes, building components, grain bins, garage doors and industrial packaging. To enhance performance in specific end uses, galvanized steel is often painted, coated, and/or laminated as well.
Electrogalvanized
Electrogalvanized (EG/Egalv) is a cold reduced steel product which has a thin coating of zinc by electrolytic deposition.The electrolytic process allows for a more precise control of the zinc coating, allowing it to be used with lower coating weights.
Electrogalvanized has a smooth, dull gray surface appearance. It is available on the full range of steel grades from Commercial Steel (CS) through Extra Deep Drawing Steel (EDDS). Chemical treatment (passivation) is available to retard zinc oxide or the surface can be phosphate coated (bonderized) to improve post painting adhesion.
The product is available in gauges ranging down to 0.007″ (0.18mm) and with coating weights of G20 (20 g/m² per side) to G90 (90 g/m² per side). Electrogalvanized is not recommended for outdoor exposure unless it has been painted prior to exposure. This is done regularly for various types of doors and small buildings.
Hot Dipped Galvanized
Hot Dipped Galvanized (HDG/GI) is produced by running a cold rolled substrate through a molten bath of zinc or zinc alloys. Typically, it is used in applications where corrosion resistance is a necessity such as building panels, farm equipment, electronic equipment, and ductwork.
The hot dip coating process assures a tightly adherent, uniform coating of zinc on both sides of the product. A thin alloy layer readily permits normal fabrication practices without incurring significant coating damage.
It is available on the full range of steel grades from Commercial Steel (CS) through Extra Deep Drawing Steel (EDDS). Chemical treatment (passivation) is available to retard zinc oxide. The product is available in gauges ranging down to 0.007″ (0.18mm) and with coating weights of 20G (20 g/m² per side) to 90G (90 g/m² per side).
Galvalume, Galvanneal, & ZAM
Galvalume (GL), Galvanneal (GA), and Zinc-Aluminum-Magnesium (ZAM) are specialty zinc-alloy coatings applied via a hot dip process. These metallic coatings are engineered to provide enhanced corrosion resistance in specialty applications.
These products are available in gauges down to 0.008″. Galvalume has coatings from AZ30-AZ60. Galvanneal has coatings of A25-A60. ZAM has coating weights of ZM30-ZM115.
Pre-Painted & Other Coatings
Galvanized products can be pre-painted or coated with a range of organic or inorganic chemical coatings. The paint or other coatings are often applied to the coil at the producing mill. However, additional coil and sheet coatings are available from third parties.
We are familiar with a wide range of coatings for end uses from construction to automotive to appliances.
Galvanized Request
Buy, sell or request processing of galvanized steel