Electrogalvanized steels: corrosion resistance with the thinnest possible coating
Electrogalvanizing (EG or ZE) steel involves electrolytically depositing a layer of zinc by running a steel strip through a conducting zinc salt bath with inert anodes and the steel as the cathode. Electrogalvanization provides a uniform coating and high surface quality. EG coats are much thinner than other galvanizing processes, making them appropriate when the thinnest possible coating is needed for corrosion resistance.
Electrogalvanizing: aka, EG or ZE
SSAB offers various EG-coated steels, many of which are targeted to automotive OEMs. Particularly noteworthy are our electrogalvanized martensitic steel grades. Electrogalvanized coatings are designated as EG by the VDA standards and ZE by the EN nomination.
Electroplating or electrogalvanizing?
Technically, the terms are not interchangeable. Electroplating means applying a metal coating (including decorative metals, such as silver or gold) to a solid surface using an electric current. Electrogalvanization specifically uses zinc to coat steel to provide resistance to corrosion.
*In triple spot test
Processing properties of electrogalvanized steel
Forming EG steel
Electrogalvanization, with its thin coatings, can be suitable for highly formed parts; for example, deeply drawn components. Extreme forming applications may require lubrication prior to forming.
Welding ZE steel
Electrogalvanizing provides excellent resistance spot welding properties.
Adhesive and mechanical joining of electrogalvanized steel
Electrogalvanized steel can be joined using a variety of adhesives. EG-coated parts are generally considered easier to bond than traditional zinc-coated (GI) parts. Mechanical joining of electrogalvanized parts can be done using bolts, rivet tabs, or non-tabs.
Is electrogalvanized steel right for your project?
Contact our corrosion resistance steel coating experts.