With a reputation for being the most robust alloy on earth, there are times when even steel needs help to become even more durable. Typically, this is achieved through the process of galvanising, resulting in a product called galvanised steel.

So, what is galvanised steel? How is it used today, and what advantages does it offer over untreated steel? We explore the galvanised steel properties that have earned it its reputation and help you decide whether it’s the right material for your next project.

What is galvanised steel?

Put simply, galvanised steel is a zinc-iron alloy product made by applying a zinc coating to steel. Although untreated steel is still regarded as a tough metal, there are some instances when it needs added protection to prevent corrosion and improve durability, such as when the steel is exposed to higher moisture and oxygen levels.

The bond is formed with the base metal coated in zinc, and the steel is given an outer layer of protection. Once galvanised, this product is known as one of the most durable and corrosion-resistant products on the market, and many industries use it for countless applications.

How is galvanised steel made?

Galvanised steel is commonly made by immersing it into molten zinc. However, the exact method differs depending on the material’s use. These are the two most common ways to produce galvanised steel and the process involved.

Hot dipped galvanising

The hot-dipped galvanising process submerges carbon steel into molten zinc at extreme temperatures. After being removed from the zinc, it begins to cool. This cooling creates a reaction with the oxygen that develops a tough iron-zinc alloy bond, forming the protective coating.

Continuous galvanising

This process is preferred for steel ribbons and sheets, with the steel ribbon passing through a zinc bath and being coated as it does. After emerging from the bath, the layer of molten zinc on the steel is removed with a high-pressure air device, resulting in a pliable material. The thickness of the steel can then be adjusted to suit the application before being cooled and formed.

Beyond these two processes, there are other ways of creating galvanised steel, including electro-galvanising. But regardless of which galvanising process is used, the numerous benefits remain.

The advantages of using galvanised steel in your next project

Offering numerous advantages over untreated steel, galvanised steel properties are utilised by many different industries and users. These are just some of the many benefits that galvanised steel brings to the table:

Lifespan: With a galvanised finish, steel has an expected lifespan of more than 50 years in a standard environment. Even with extreme water exposure, galvanised steel can last more than 20 years. More importantly, minimal maintenance is needed on the steel, so it’s a reliable option.
Rust prevention: Steel is sometimes prone to rusting, and galvanising can help prevent this. The zinc coating provides a buffer, so elements like oxygen and moisture can’t reach it.

Cost-friendly: Although more durable, galvanised steel is an affordable option. In addition to its low cost, it requires no additional preparation, so there’s no need to paint or coat it further.
Protective layer: The zinc coating acts as a protective coating, so even when exposed, it will corrode first. The steel beneath is protected, ensuring it lasts longer than steel without the sacrificial protection of zinc.
Design appeal: Depending on how they’re made, a galvanised steel finish can have steel a spangled look or a uniform soft grey appearance, which some might prefer for their projects.

Common uses for galvanised steel

So, how can you put galvanised steel to use? Both commercial and residential customers rely on this zinc-coated steel for projects, including applications like:

Reinforcing mesh
Reinforcing bar
Construction
Scaffolding and planks

Rail systems
Walkways

The durability and variety of uses possible with galvanised steel and reinforced bars make it invaluable to several industries and users.

The industries that rely on galvanised steel

With affordability, minimal maintenance, and durability among its many benefits, most industries see the advantages of using galvanised steel. Today, you can expect to find this resilient alternative used in:

Construction

Galvanised steel is durable and visually pleasing for residential and commercial construction projects. From larger structures of steel frames to smaller rails, tubes, grates, and gutters, you can find it in use.

Automotive and transport industry

Once only reserved for luxury vehicles, zinc-coated car bodies are now standard in the automotive industry. Sometimes, the material is used to create bicycle frames and solidify rail systems.

Solar and natural energy industries

Galvanised steel ticks all the boxes for the natural energy industry. Its no-emission, low maintenance, and long-lasting nature make it a reliable choice for solar projects and wind farms.

Telecommunications

Phone lines are often made with galvanised steel to protect the wiring and equipment boxes. This added protection means reduced maintenance and risk of damage, as they’re constantly exposed to the elements.

Explore the possibilities of galvanised steel

At Neumann Steel, we understand the ever-changing uses and requirements for galvanised steel. As a versatile and durable alternative to regular steel, it’s easy to see why it’s the go-to choice for commercial and domestic projects.

Considering using galvanised steel in your next project but still want to learn more? The expert team at Neumann Steel is here to help. For a technical or design discussion, submit an enquiry via our contact page.