What Is Galvanized Steel Made Of?


Galvanized steel is made by coating the steel in zinc to better resist corrosion. There are three methods of producing galvanized steel. The end-use application and coating thickness required determine which process to use when making galvanized steel.

Batch Galvanizing

  • This process is used on hardware such as bolts, nuts, nails and screws as well as piping and other steel shapes. The steel is fabricated into a form, cleaned, then immersed in molten zinc.

Continuous Galvanizing

  • This process is used primarily for steel sheet but also steel wire and strip. As the steel passes through a bath of molten zinc, the start of the next coil is welded onto the end of the previous coil.


  • Electrogalvanized coatings of zinc are applied through a continuous plating process. The positively charged anodes attach zinc to negatively charged steel.

Bonding Process

  • With the two hot-dip methods, the zinc coating reacts with the steel to form three underlying zinc-iron alloy layers and one top layer of pure zinc. Electrogalvanizing deposits pure zinc on the steel.

Coating Thickness

  • Batch galvanizing produces a thicker coating, while the thickness can be adjusted after continuous galvanizing using air streams. With electrogalvanizing, the thickness of the zinc is controlled by the speed at which the steel is fed through and the amount of electrical charge.


Promoted By Zergnet


You May Also Like

  • What Is Galvanized Metal Made Of?

    When ferrous metal (metal containing iron) is exposed to air, it readily oxidizes, or rusts, weakening the metal and making it unsuitable...

  • Disadvantages of Galvanized Steel

    Galvanized steel is all around, even when not visible. Many houses built before the 1960s are framed with it, and many buildings...

  • Advantages of Galvanized Steel

    Steel is put through a process called "galvanizing" that keeps it from corroding. Very simply, it gets coated with zinc because that...

  • Properties of Galvanized Steel

    Galvanized steel is produced by coating the steel in zinc. The properties of galvanized steel are a unique combination that make it...

  • How to Bend Galvanized Sheet Metal

    Galvanized steel is a resilient and corrosion-resistant metal, which makes it an ideal component in many projects. Bending the galvanized steel can...

  • How to Drill a Hole in Galvanized Metal

    Whether you are fastening a screw or running a line through metal, at some point, you will need to drill a hole...

  • Types of Galvanized Steel

    Steel is an umbrella term that covers a large group of metals, all of which are alloys. Galvanized steel, one of the...

Related Searches

Read Article

Make an Ikea Lack Table Look Expensive With This Cheap Hack

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!