Our Service
Our Galvanizing Services
We provide professional hot dip galvanizing services for structural steel, industrial components, and fabricated assemblies. By immersing steel in molten zinc, we create a tough, uniform coating that offers long-lasting protection against corrosion, even in harsh outdoor or industrial environments.
Our centrifuge galvanizing service is tailored for small, detailed, or threaded components like bolts, nuts, brackets, and fasteners. After dipping in molten zinc, the parts are spun at high speed to remove excess zinc, ensuring clean threads and precise dimensions. This process delivers all the corrosion-resistant benefits of hot dip galvanizing, while preserving the usability of intricate parts.
What is Hot-Dip Galvanizing?
Hot dip galvanizing is a highly effective method of corrosion protection where steel is coated with molten zinc. It provides long-term durability by forming a strong, bonded protective layer. Even if the coating is slightly damaged, the surrounding zinc offers sacrificial protection.
Compared to paint or other coatings, it offers lower long-term costs and is ideal for heavy-duty applications like structural steel, walkways, pipes, and reinforcement in concrete.
Hot-Dip Galvanizing Process
Why Choose Us
With over 35 years of experience and the largest galvanizing capacity in Thailand, SSG delivers
industrial-grade hot-dip galvanizing with precision, speed, and nationwide reach.
Our three strategic plants, certified processes, and commitment to quality and sustainability make us the go-to partner for infrastructure, energy, construction, manufacturing, and a wide range of industrial applications.
99.95%
pure zinc
Industrial-Grade Precision & Quality
We are ISO 9001 certified and use 99.995% special high grade zinc to ensure consistent coating quality, corrosion resistance, and long-term performance.
99.95%
pure zinc
Thailand’s Largest and Most Versatile Galvanizing Capacity
With over 13,000 tons/month across three plants, we galvanize a wide variety of steel products — from small components to large industrial structures — meeting diverse industry needs with unmatched scale and reliability.
Built for All Industries
Electrical
Galvanized steel supports critical power and telecom infrastructure such as electrical transmission towers, substation frameworks, cable trays, grounding materials, poles, and telecommunications towers and components — ensuring long-term protection and reliability.
Industrial
In industrial settings, galvanizing protects structural steel, machinery supports, conveyor systems, handrails, and storage racks. Its resistance to chemicals and moisture makes it perfect for factories and processing facilities.
Transportation
Galvanized steel is essential in the transportation sector for its durability and corrosion resistance. Common applications include guardrails, highway sign structures, light poles, and truck/trailer components — ideal for long-term outdoor exposure.
Construction
Galvanized steel is ideal for construction exposed to weather and moisture. It offers long-lasting durability with minimal maintenance — perfect for poles, roofing, structural beams, scaffolding, and coastal structures.
Consumer Applications
Galvanized components are used in everyday products such as metal furniture, gates, fencing, storage units, and bicycle racks — offering lasting performance with minimal upkeep.
Other Industries
Beyond these sectors, our hot-dip galvanizing services extend to agriculture, marine and offshore, mining, water treatment, and many more. Whatever your industry or project, we offer customized galvanizing solutions to meet your specific needs.
Hot-Dip Galvanizing Solutions
We specialize in providing durable and reliable hot-dip galvanized solutions that protect steel from corrosion, ensuring long-lasting performance and structural integrity across a wide range of industrial applications.
Project Reference
From infrastructure and construction to energy, utilities, manufacturing, and beyond — our galvanizing services have played a vital role in a wide range of projects across Asia. Whether it’s steel bridges, transmission towers, industrial plants, or custom structural components, SSG is the trusted partner for companies seeking durability, precision, and nationwide delivery.
FAQs
How much is the galvanizing cost per kilogram, and how is it calculated?
We have a base rate, but pricing is negotiable for bulk orders. The cost is calculated based on the post-galvanizing weight in Baht per kilogram.
What galvanizing standards do you follow?
- American Standards: ASTM A123/A123M, A153/A153M
- British Standards: BS 729
- International Standards: BS EN ISO 1461
- Australian Standards: AS 1214, AS/NZS 4680
- Japanese Standards: JIS H8641
- German Standards: DIN 50976
What is the difference between ground finishing and non-ground finishing?
With ground finishing, we remove excess zinc drips and wire marks. Without it, the surface remains raw and requires customer-side finishing. Opting out of grinding can result in faster lead time.
How long does galvanizing take?
Typically 5–7 working days, depending on workload. Smaller quantities may be completed sooner.
How do I make a payment?
Our accounting team will notify you of the total cost before pickup. Payment can be made in cash on delivery or via bank transfer in advance.
Can you pre-drill holes in the steel?
Yes, but we’ll first need to review your drawings or photos. Our team can also consult with you on-site if needed.
What are the bath sizes at each facility?
Saraburi Branch:
- Building 1: 9.0 m (L) x 1.80 m (W) x 3.0 m (D)
- Building 2: 13.5 m x 1.60 m x 2.50 m
- Building 3 (Spinning): 2.0 m x 1.0 m x 1.0 m
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Samut Prakan Branch: 13.5 m x 1.60 m x 2.50 m
Rayong Branch: 13.5 m x 1.60 m x 2.50 m
Why does the product surface turn dull gray after galvanizing?
This typically results from high silicon content in the steel combined with high bath temperatures, especially with thicker sections.
Why are there black spots or uncoated areas?
- Weld joints are incomplete or improperly sealed
- The product was not adequately cleaned before galvanizing
How many plants does Siam Steel Galvanizing operate?
We operate 3 branches:
- Siam Steel Galvanizing (Saraburi)
- Siam Steel Galvanizing (Samut Prakan)
- Rayong Galvanizing (Rayong)
Can the steel warp during galvanizing?
Warping is possible due to the 450°C bath temperature, especially for thin or asymmetrical components.
Do you offer transportation service?
Yes. We provide logistics using 6-wheel side-load trucks, each carrying up to ~5.5 tons per trip. Fees depend on distance, and customers are responsible for loading and unloading.
Our Catalog
Discover durable, high-performance galvanized solutions — explore our catalogue and find the right fit for your project.
Ready to pull the trigger? Get a quote today.
Ready to pull the trigger?
Get a quote today.
