High-Quality Hot-Dip Galvanizing Services
We provide durable, standards-compliant hot-dip galvanizing for structural steel components. With a large-scale facility and advanced equipment, we ensure reliable corrosion protection for projects of any size.
Our Service
Our Galvanizing Services
Hot Dip Galvanizing
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.
Centrifuge Galvanizing (Spinning)
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.
Hot-Dip Galvanizing Process
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.
We deliver more than services
why choose us
With three decades of experience and industry-certified processes, we deliver consistent galvanizing quality
at scale — trusted by leading contractors, fabricators, and manufacturers across Thailand and beyond.
Situated in the Eastern Economic Corridor (EEC), RGC is ideal for clients with operations in Rayong, Chonburi, and nearby provinces — with direct access to key logistics routes and ports.
Our skilled team and modern facilities ensure corrosion protection that meets international standards, including ISO 9001 and ASTM compliance.
We serve a wide range of sectors — from transmission lines and telecom to automotive, prefab construction, and industrial equipment.
Using 99.995% special high grade zinc and strict process control, we deliver uniform coating performance and long-lasting durability.
Benefit from the stability, reputation, and nationwide network of one of Thailand’s leading industrial groups.
Case Study
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Our service
We specialize in providing durable hot-dip galvanized solutions.
We offer comprehensive hot-dip galvanizing services to protect steel structures against corrosion. Our facilities are equipped with advanced technology to ensure uniform coating, long-term performance, and cost-effective protection for construction, industrial, and infrastructure applications.
FAQ
Answers to Your Questions
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.
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
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.
Typically 5–7 working days, depending on workload. Smaller quantities may be completed sooner.
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.
Yes, but we’ll first need to review your drawings or photos. Our team can also consult with you on-site if needed.
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
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
This typically results from high silicon content in the steel combined with high bath temperatures, especially with thicker sections.
Weld joints are incomplete or improperly sealed
The product was not adequately cleaned before galvanizing
We operate 3 branches:
1. Siam Steel Galvanizing (Saraburi)
2. Siam Steel Galvanizing (Samut Prakan)
3. Rayong Galvanizing (Rayong)
Warping is possible due to the 450°C bath temperature, especially for thin or asymmetrical components.
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.
Smart solutions for all sectors
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.
