Why hot-dip galvanizing?
Steel and iron are highly susceptible to corrosion under normal conditions, leading to significant damage and costing billions of dollars across various industries. Conventional methods, such as painting and electrostatic coating, provide only short-term protection for steel structures and can be costly.
Hot-dip galvanizing was developed to address these challenges. With its strong bonding properties and exceptional corrosion resistance, zinc serves as an effective shield, protecting steel structures from the elements and ensuring long-lasting durability.
Product longevity and coating thickness
Product Longevity and Coating Thickness
Hot-dip galvanizing enhances the corrosion resistance and structural integrity of steel structures, extending their lifespan to over 50 years.
Hot-dip galvanizing process
01
Degreasing
Immersing the steel in a degreasing solution to remove oils, grease, acid and other contaminants from the surface.
02
Pickling
Removing rust layers (iron oxide) from the material surface by immersing the steel in
an acid solution.
03
Rinsing
Rinsing the steel with clean water to remove residual acid and other contaminants.
04
Fluxing
Immersing steel in molten flux promotes zinc adhesion. After flux treatment, the steel is dried to ensure the surface is hot and dry before immersion in molten zinc.
05
Zin bath
Immersing the steel completely in a molten zinc bath. The thickness of the zinc coating depends on the immersion time and the temperature of the zinc bath.
06
Cooling/Chromating
Immersing the galvanized steel in a
cooling tank solidifies the zinc coating,
and optionally, it may be treated with a passivating solution to enhance
corrosion resistance.
07
Dressing
Inspect the galvanized steel for defects
to ensure it meets quality standards. Conducting post-treatment to
enhance aesthetics.
01
Degreasing
Immersing the steel in a degreasing solution to remove oils, grease, acid and other contaminants from the surface.
02
Pickling
Removing rust layers (iron oxide) from the material surface by immersing the steel in an acid solution.
05
Zin bath
Immersing the steel completely in a molten zinc bath. The thickness of the zinc coating depends on the immersion time and the temperature of the zinc bath.
04
Fluxing
Immersing steel in molten flux promotes zinc adhesion. After flux treatment, the steel is dried to ensure the surface is hot and dry before immersion in molten zinc.
03
Rinsing
Rinsing the steel with clean water to remove residual acid and other contaminants.
06
Cooling/Chromating
Immersing the galvanized steel in a cooling tank solidifies the zinc coating, and optionally, it may be treated with a passivating solution to enhance corrosion resistance.
07
Dressing
Inspect the galvanized steel for defects to ensure it meets quality standards.Conducting post-treatment to enhance aesthetics.
Gallery: Our hot-dip galvanizing process
Gallery: Our hot-dip galvanizing process
Frequently asked questions
1. What to prepare before sending products for galvanizing?
– Has your product been designed to meet venting and draining requirements for the galvanizing process?
– Do your products exceed the dimensions of our galvanizing tank?
– Which galvanizing standard would you like to apply to your products?
2. How long does the galvanizing process take?
The galvanizing process typically takes between 4 to 6 working hours, depending on the type and volume of the product. This duration does not account for delivery or waiting times. The timeline may vary based on specific project requirements. If you have special needs or deadlines, we recommend contacting us in advance to ensure a tailored solution.
3. Does Viet Vuong offer packaging or post-galvanizing painting services?
We offer standard packaging for galvanized products. If you require customized packaging tailored to your specifications, please discuss it with us in advance so we can finalize the pricing and implementation methods.
Additionally, we provide post-galvanizing painting services and shot blasting services (pre-galvanizing surface cleaning). Please discuss these requirements with us in advance to agree on pricing and implementation methods.
For more details, please contact our hotline: (+84) 978 358 999 or email us at info@vvjsc.com.
4. What are the delivery and pickup times at the factory?
The warehouse operates during the following hours:
Morning: 7:30 AM – 12:00 PM
Afternoon: 1:00 PM – 4:30 PM
If you need to arrange a schedule outside of these hours, please notify us in advance for assistance.
5. Does Viet Vuong provide transportation and delivery services?
Yes, Viet Vuong offers comprehensive transportation and delivery services.
We operate a fleet of over 20 trucks and trailers, along with more than 5 types of cranes with varying load capacities to meet the diverse needs of our clients.
As a strategic partner with leading logistics companies in Vietnam, we are equipped to handle both domestic and international delivery requirements.
6. What hot-dip galvanizing standards does Viet Vuong use?
Viet Vuong’s galvanizing factory adheres to the following hot-dip galvanizing standards:
• 18 TCN04-92 (Electrical Industry Standard)
• ASTM A123M (American Standard)
• JIS G 04861 (Japanese Standard)
• ISO 1461 (International Standard)
7. How to inspect and evaluate the quality of galvanized products?
To inspect and evaluate the quality of galvanized products, please refer to the guidelines provided by the American Galvanizers Association in the document available here: http://bit.ly/2rZBVOD.
Need consultation and quotation?
Please feel free to reach out for more information, consultation, and a customized quote for your projects/products.
