Detailed Explanation of 14 Processes of Hot-dip Galvanized in Fence Manufacturing

As a leading professional fence manufacturer, we pride ourselves on our expertise in the hot-dip galvanized process. This blog post will delve into the detailed 14-step process that ensures our fences not only meet but exceed industry standards for durability and quality. We’ll also highlight our specialized products, including Vertical Slat Fencing, Garrison Fence, and Welded Wire Dog Kennel, showcasing our unique strengths in the fencing industry.


Definition of Hot-Dip Galvanizing

Hot-dip galvanizing is a metallurgical process and a form of galvanizing. The process involves dipping the base metal into a molten bath of zinc at a temperature of around 450°C (842°F). This results in a robust, adherent coating that is highly resistant to rust and environmental degradation.

Hot-dip Galvanized Process


The 14-Step Hot-Dip Galvanizing Process

1. Blanking

Initially, we carefully select and place the raw material into our processing line. This step is crucial as it sets the foundation for the uniform quality of the final product.


2. Degreasing

Using environmentally friendly solvents, we thoroughly cleanse the surface of the metal to remove all contaminants like oil and grime, ensuring a pristine surface ready for further processing.


3. Washing

Post-degreasing, the material undergoes a rigorous washing process to eliminate any residual degreaser and impurities, preparing it for the acid pickling stage.



4. Acid Picking

Our acid pickling process uses a carefully balanced mild acid solution to remove rust, mill scale, and other iron oxides from the metal surface, which is essential for optimal adhesion of the hot-dip galvanizing zinc coating.


5. Washing

Another thorough washing follows to ensure all acidic residues are removed, safeguarding the integrity of the metal.


6. Picking Acid

We apply a specialized formula that enhances the metal’s wear resistance and promotes better adhesion of the zinc coating, crucial for extending the lifespan of the product.

Picking Acid


7. Drying

The metal is then dried using high-efficiency dryers to remove any remaining moisture, preventing any steam formation during the zinc dipping process.


8. Preheat

Gradual preheating of the metal prepares it for hot-dip galvanizing, ensuring the zinc adheres smoothly and uniformly.


9. Hot-dip Galvanizing

The core of our process, the metal is submerged in molten zinc at a controlled temperature, forming a robust barrier against corrosion and rust.

When the clean iron or steel component is dipped into the molten zinc (which is commonly at around 450°C) a series of zinc-iron alloy layers are formed by a metallurgical reaction between the iron and zinc.

A typical time of immersion is about four or five minutes but it can be longer for heavy articles that have high thermal inertia or where the zinc is required to penetrate internal spaces.

Hot-dip Galvanized


10. Clean

After galvanizing, the metal is cleaned to remove any excess zinc, which smooths the surface and enhances the aesthetic appeal of the final product.


11. Cooling

The metal is slowly cooled in a controlled environment to stabilize the zinc coating, ensuring its hot-dip galvanized durability and structural integrity.


12. Passivation

Applying a passivation layer provides additional protection against environmental factors, thus further enhancing the metal’s corrosion resistance.



13. Drying

A final drying phase ensures that the passivation layer is perfectly set, thus preparing the metal for the final inspection.


14. Inspection

Each piece undergoes a detailed inspection for appearance, adhesion, and smoothness, ensuring that it meets our stringent quality standards.

Hot-dip Galvanized Process


Benefits of Hot-Dip Galvanizing

1. Durability:

The zinc coating provides excellent protection against corrosion, significantly extending the life of the metal.

2. Economical:

It is a cost-effective corrosion protection method, especially for large structures.

3. Sustainability:

Zinc has a lower environmental impact compared to other coatings, and the longevity it provides reduces the need for frequent replacements or repairs.

4. Versatility:

Hot-dip galvanizing is suitable for metals of all shapes and sizes and is ideal for a variety of industrial applications.


This process is widely adaptation in numerous industries, including construction, automotive, and utilities, to protect steel structures and components from corrosion, thus enhancing their longevity and performance.

Hot-dip Galvanized


Our Products

Vertical Slat Fencing

Our vertical slat fences are overall elegant and durable. It features a unique vertical construction that provides privacy while maintaining a sleek and modern appearance. Perfect for residential and commercial properties looking for a stylish yet secure fencing solution.


Garrison Fence

Garrison fencing provides maximum security without sacrificing aesthetics. Its robust design is ideal for areas requiring enhanced protection, such as schools, industrial properties, and government buildings.


Welded Wire Dog Kennel

Our welded wire dog kennels are extremely durable and use only hot dip galvanized steel to ensure they are safe and durable. They provide ample space and security for pets, thus making them a top choice for pet owners and breeders.

Hot-dip Galvanized Factory



At FENCE DEPOT, our meticulous attention to every step of the hot-dip galvanized process ensures that each product we manufacture is of the highest quality. By choosing our fencing solutions, you benefit from our commitment to excellence and our dedication to delivering products that exceed expectations.


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