Galvanised steel is a durable and corrosion-resistant material mostly used in construction, automotive, and industrial applications. The steel undergoes a protective zinc coating process to enhance its longevity and performance. This guide explores its types, benefits, manufacturing processes, and recent industry updates.

Also read: 5 tips to reduce steel corrosion

What is Galvanised Steel?

Galvanised steel is also known as steel alloy which is coated with a layer of zinc that helps to protect it from rust and corrosion. The zinc coating acts as a sacrificial barrier, shielding the steel from moisture and external elements, ensuring longevity and durability.

Brief History of Galvanised Steel

Luigi Galvani was the first person who introduced the concept of galvanisation in the 18th century when he discovered electrochemical reactions in metals. By the 19th century, hot-dip galvanisation became a standard practice, revolutionising industrial steel protection. Today, it is an essential material in construction, automotive, and manufacturing industries.

Key Characteristics of Galvanised steel

• Corrosion Resistance – Protect the steel to get rusted and oxidation.
• Durability – Can last for 40-70 years with minimal upkeep.
• Versatile Applications – Used in roofing, fencing, industrial machinery, and appliances.
• Cost-Effective – As per its superior longevity it is more affordable than a stainless steel.
• Eco-Friendly – it does not need much maintenance over time and easily recyclable.

Galvanised Steel Price per kg​

Here is a table that compares galvanized steel prices per kilogram in India between March 2024 and March 2025:​

Note: These prices are approximate and can vary based on regional factors and specific product specifications.​

The price of galvanized steel decreased by ₹2.50 per kilogram from March 2024 to March 2025. Several factors contributed to this decline, including global market fluctuations, changes in raw material costs, and shifts in supply and demand dynamics. The U.S. implemented import tariffs on steel and aluminum in March 2025, reshaping global steel trade and potentially redirecting excess supply into India, which led to a price correction. ​reuters.com

Various factors influence steel prices, including geopolitical events, currency exchange rates, and domestic economic conditions. To obtain the most accurate and up-to-date pricing, consult local suppliers or industry sources.

Must read: Steel Buyers Beware! Avoid These Costly Procurement Mistakes

Types of Galvanisation Techniques

Different galvanisation techniques impact the quality, finish, and performance of the steel.

1. Hot-Dip Galvanising (HDG)

Steel is dipped in molten zinc, forming a thick, durable coating. This is the most common method for outdoor and industrial use.

2. Electro galvanising

A thin zinc layer is applied using an electric current. This process results in a smooth finish, ideal for automotive and appliance manufacturing.

3. Sherardising

A dry process where steel is heated in a zinc powder-filled chamber. It is suitable for small components like fasteners and tools.

4. Mechanical Plating

Zinc powder and impact media coat the steel through mechanical energy, creating a uniform finish for lightweight applications.

Comparison of Galvanisation Methods

How is Galvanised Steel Manufactured?

The galvanisation process ensures an even zinc coating for optimal protection against corrosion.

Step-by-Step Process

1. Clean the Steel Surface: Thoroughly remove contaminants such as grease, dirt, and rust.
2. Submerge in Acid Pickling Bath: Immerse the steel in an acidic solution to eliminate oxidation and surface impurities.
3. Apply Flux Solution: Coat the steel with flux to enhance zinc adhesion.
4. Dip in Molten Zinc: Immerse the steel in molten zinc at 450°C (842°F) to form a protective layer.
5. Cool and Solidify: Allow the coated steel to cool, solidifying the zinc layer for enhanced durability.
6. Inspect and Ensure Quality: Check each piece for uniformity and coating thickness to ensure compliance with industrial standards.

Benefits of Galvanised Steel

Galvanised steel offers multiple advantages across industries, making it a preferred choice for durable infrastructure.

Applications of Galvanised Steel

Galvanised steel is used in multiple industries, offering durability and reliability.

1. Construction & Infrastructure

• Roofing sheets, pipes, and guardrails.
• Structural frameworks for bridges and buildings.

2. Automotive Industry

• Car bodies, chassis, and fuel tanks.
• Protection against road salt and moisture damage.

3. Electrical Appliances

• Refrigerators, air conditioners, and washing machines.
• Offers a smooth finish for high-end designs.

4. Agriculture & Fencing

• Farm equipment, grain silos, and livestock enclosures.
• Long-lasting protection against weather conditions.

5. Industrial Machinery

• Storage tanks, pipes, and mechanical parts.
• Ensures durability in harsh chemical environments.

Recent Updates in the Galvanised Steel Industry

Changing trade policies, increased investments, and sustainability initiatives are transforming the steel industry.. These updates affect pricing, supply chain stability, and manufacturing innovations.

Comparison: Galvanised Steel vs Other Steel Types

Choosing the right steel type depends on its application, durability, and environmental impact. Below is a comparison to aid decision-making.

Understanding these differences helps in selecting the right steel for industrial, automotive, and construction applications.

Conclusion

Galvanised steel is a versatile, cost-effective, and long-lasting material widely used across industries. Its corrosion-resistant properties make it ideal for applications requiring durability and minimal maintenance. Keeping up with industry updates and innovations ensures businesses make informed material choices.

Where is Galvanised Steel Most Beneficial?

• Construction & Infrastructure – Ideal for bridges, pipelines, and roofing.
• Automotive Industry – Used in vehicle frames and fuel tanks for corrosion protection.
• Agriculture & Fencing – Suitable for farm equipment and enclosures.
• Electrical Appliances – Found in refrigerators, air conditioners, and washing machines.

For those in these industries, galvanised steel is the excellent option for strength, affordability, and sustainability.

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