Sep 12, 2026News & Insights
Why Hot-Dip Galvanizing? Protect Your Chains for Years
hot-dip galvanizing (HDG) is the preferred finish for chains used in marine, playground, agricultural, and industrial environments.
Rust is the enemy of steel chains. Without protection, outdoor chains can corrode within months. That’s why hot-dip galvanizing (HDG) is the preferred finish for chains used in marine, playground, agricultural, and industrial environments.
The finish is often written both ways - "hot dip galvanized" for the process and "hot dipped galvanized chain" for the finished product. Both refer to the same protection: a chain immersed in molten zinc to coat every surface.
What Is Hot-Dip Galvanizing?
The chain is dipped into a bath of molten zinc at about 450°C. A metallurgical bond forms, creating a thick, durable zinc‑iron alloy coating. The result is a chain that resists rust – even when scratched.
Key Benefits of HDG Chains
- Long‑term corrosion protection – Zinc corrodes sacrificially, protecting the steel underneath. HDG chains can last 10–20 years outdoors.
- Tough & abrasion‑resistant – Much thicker than electro‑plating (50–100+ µm), the coating survives dragging and contact with hard surfaces.
- Full coverage – Every link surface, including crevices and inner bearing points, is protected.
- Low maintenance & lower total cost – Higher upfront cost pays off through fewer replacements and less downtime.
HDG vs. Other Finishes
Finish | Thickness | Outdoor Life |
|---|---|---|
Hot-dip galvanized | 50–100+ µm | 10–20 years |
Electro-galvanized | 5–15 µm | 1–3 years |
Raw (uncoated) | None | Weeks to months |
Common Applications
- Marine mooring & anchor chains
- Playground swings & barriers
- Outdoor industrial tie‑downs
- Agricultural fencing & tethering
- Road signs & guardrails
Boyuan Metal’s HDG Chains
We supply hot‑dip galvanized chains in DIN 766, DIN 763, DIN 764 standards, Grade 30/40/50, fully compliant with ISO 1461. Also available: stainless steel chains and plastic covers for playground safety.
Choose HDG. Stop rust. Save long term.
Contact Boyuan Metal for a quote today.
Frequently Asked Questions
What is the difference between hot dip galvanized and electro galvanized chain?
Hot dip galvanizing immerses the chain in molten zinc and builds a thick, bonded layer that stands up to years outdoors; electro galvanizing plates a thinner, brighter layer that suits indoor and light outdoor use. For permanent outdoor or wet environments, hot dip is the heavier protection.
Which chains are available hot dip galvanized?
Our DIN 5685A hot dip galvanized chain is a standard example, and other chains in the range can be supplied with the same finish. Tell us the diameter and length you need and we will confirm the supply.