What is Galvanised Steel?
9 minutes read
12 Mar 2024
Since its discovery in 13th century BC, steel has become one of the most widely used construction materials. Spanning a range of industries, it is often used for its strength and pliability. This popularity has led to enhanced versions of steel, one of which is galvanised steel.
You may have heard of it before, but might be wondering: what exactly is galvanised steel? How does it differ from other kinds of steel? In the following post, we will explore the features, uses and history of galvanised steel to give you a comprehensive guide.
Article in Brief
Galvanised steel is a coated version of steel that’s become a crucial material for many industries, including construction, agriculture, automotive and infrastructure.
Through a process called galvanisation, steel is coated with a layer of zinc. This gives it many useful properties, including increased durability, longevity, and resistance to moisture.
Steel was first galvanised in 1836 by Stanislas Sorel. Today, steel can be galvanised in several different ways, including hot-dip, electro-galvanisation and sherardising.
If you’re looking for galvanised steel for your project, choose an experienced distributor like The Metal Store.
Galvanised steel overview
Galvanised steel, combining the strength and pliability of normal steel with added corrosion protection, is a top choice for a wide variety of applications, especially in construction.
How does galvanisation work?
Galvanisation (or galvanising) is a way of producing steel or iron that adds a coat of zinc. This offers an additional layer of protection and helps to prevent rusting. Galvanisation is a common process for steel because it adds to its already strong properties, like strength and durability.
What are the properties of galvanised steel?
Galvanised steel is used across a range of industries. This is because the galvanisation process adds a range of different properties to the metal, making it more desirable. Here are some of its top qualities:
Longevity: When galvanised, a standard piece of industrial steel can last up to 50 years more than usual. This is maintenance-free, making galvanised steel ideal for long-lasting structures.
Rust resistance: The zinc coating on galvanised steel adds a layer of rust resistance. Any metal can rust, but the added coat gives it a protective layer. This means that any moisture or oxygen will struggle to get through.
Cost-effectiveness: When delivered, galvanised steel is ready to use right away. You won’t need to invest in additional treatment or preparation. This means you can get steel that’s ready to use immediately without any additional cost.
Water resistance: Steel can corrode when exposed to excessive water. However, with galvanised steel, lifespans under heavy water exposure can increase by over 20 years. This makes it a good choice for structures that have a high chance of being exposed to the elements.
When was steel first galvanised?
Galvanised steel was first invented in 1836, with Stanislas Sorel (a French engineer) patented a process of cleaning steel and coating it with zinc. He first performed this process by dipping steel into molten zinc. He then called this the “galvanic method” which led to the term galvanisation. Since then, it has become a common method within steel production and many structures are built with it.
Modern galvanisation techniques
After its initial invention, galvanised steel has been constantly improved to meet the needs of various industries. The process has become more efficient and environmentally friendly. There are a few common ways in which galvanisation is performed – each with its own benefits:
Hot-dip galvanising: This is the traditional method, which involves immersing steel into molten zinc. The steel reacts with the zinc to form a series of zinc-iron alloy layers, providing excellent protection against corrosion.
Electro-galvanising: This method involves using an electric current to apply a layer of zinc to the steel. It allows for more control over the thickness of the zinc finish, making it the perfect choice for applications where precision is important.
Sherardising: This method involves heating steel parts in a closed rotating drum with added zinc powder. This zinc then diffuses onto the steel surface, forming a consistent coating. This method is commonly used for small components such as steel tools and accessories.
What industries use galvanised steel?
Galvanised steel is used in a variety of industries. It has become an essential building material, used for creating beams, roofing, facades and other structures. Its long lifespan and low maintenance requirements make it a great choice for the following industries:
Construction: Galvanised steel is one of the most common materials used in construction. You’ll find it in many construction projects, from bridges, buildings and large infrastructure.
Agriculture: Galvanised steel is often used in agriculture. You’ll find it in fencing, silos, water tanks and more. Its ability to withstand moisture and chemicals make it a great choice.
Automotive: You will also find galvanised steel in many vehicles, such as the body parts or frames. Galvanised steel helps to prevent rust and corrosion.
Infrastructure: Many important infrastructure sectors such as utilities use galvanised steel. For example, power transmission towers and poles use galvanised steel for its strength and corrosion resistance.
Get high quality galvanised steel with The Metal Store
If you’re searching for galvanised steel. for your project, The Metal Store is a leading supplier in the UK. Our range includes galvanised angle, pipe, box section, tube, flat bar, sheet, walkway and much more.
With FREE UK shipping on all orders above £99 + VAT, you can expect your order to reach you within 1-3 days. We also offer unlimited free cutting on many of our products and bulk discounts on offer for large orders. For more information, call us on 01274875479 or email our team at [email protected].
