Galvanised steel is a versatile and durable material that plays a critical role in numerous industries. Recognised primarily for its anti-corrosion properties, the galvanisation process involves coating steel with a protective layer of zinc to prevent rusting.
This article delves into the varieties of galvanised steel, its applications, and the advantages it offers.
There are primarily two methods of galvanising steel:
- Hot-Dip Galvanising (HDG)
This is the most common method, wherein the steel is submerged in a molten zinc bath which ensures a thick, uniform coating. The resultant material is more robust and suitable for heavy-duty applications.
- Electro-Galvanising (EG)
This method uses an electric current to deposit zinc onto the steel which offers a thinner and smoother finish. It’s ideal for products that demand a fine, aesthetic appeal.
The level of zinc coating also categorises galvanised steel. These include:
- Regular Spangle: Distinct, visible crystalline structure.
- Minimised Spangle: Smaller, less noticeable crystalline structure.
- Zero Spangle: Smooth finish with no visible crystalline structure.
Given its durability and resistance to corrosion, galvanised steel finds use in a variety of sectors:
- Construction: Used in roofing, walling, and framing structures as well as steel beams, brackets, and reinforcements in buildings.
- Automotive Industry: Body parts and undercarriages for enhanced resistance against rust.
- Electronics: Used in casings, shielding, and other components requiring durability.
- Agriculture: Grain silos, fencing, and other structures exposed to the elements.
- Utility: Utility poles, guardrails, and signs.
- Home Appliances: Washing machines, refrigerators, and air conditioners for longevity.
The standout benefit of galvanised steel is its exceptional resistance to corrosion. This protection against rust is due to the zinc layer, which acts as a formidable barrier against environmental factors, ensuring the underlying steel remains untouched. Beyond its anti-corrosive properties, galvanised steel boasts heightened durability, which translates to reduced replacement costs over time.
Its aesthetic value shouldn’t be overlooked either; smoother finishes provide products with a refined appearance. From an economic perspective, galvanisation offers a cost-effective alternative to other protective coatings or even stainless steel. Moreover, the environmental footprint of galvanised steel is commendably low since it’s fully recyclable. Additionally, its ability to reflect radiant heat makes it a preferred choice for structures in hotter climates, as it assists in maintaining cooler indoor temperatures.
Yes, galvanised steel is an essential material in today’s world, offering both functionality and aesthetics. Whether it’s in the towering skyscrapers or the vehicle you drive, the presence of this material underscores its importance in ensuring durability, strength, and resistance to the elements.
Talk to the Steelmor team for more information.