Thermal Diffusion
Zinc Coating
Engineered for Maximum Corrosion Protection
Distek delivers complete TDZ coating lines – equipment, materials, and technical expertise – for manufacturers who demand unmatched durability and environmental performance.
What Is Thermal Diffusion Zinc (TDZ)?
Thermal Diffusion Zinc coating (TDG) is a dry-process galvanizing technology where zinc powder is diffused into steel at controlled temperatures.
It creates a metallurgically bonded coating that outperforms hot-dip galvanizing, electroplating, zinc flake, and mechanical plating.
Key advantages:
- Up to 10× better corrosion resistance
- No hydrogen embrittlement — ideal for high-strength steels
- Uniform, precise coatings even on complex geometries
- Environmentally superior — no acids, flux, fumes, or wastewater
- Low operating costs and no hazardous waste
The Global Leader in Thermal Diffusion Galvanizing
What we do
Distek designs and manufactures complete TDG coating systems — from equipment and furnace design, to installation, training, and long-term technical support. We also supply our proprietary zinc powder and process materials, ensuring consistent coating quality across every batch.
With over 30 years of innovation, Distek’s TDZ lines are used by leading manufacturers in:
- Railway & infrastructure
- Fasteners & bolts
- Chains & lifting equipment
- Automotive components
- Defense applications
- Utility infrastructure
- Road safety hardware
- Heavy industrial steel products up to 3 meters
Why DiSTeK?
Higher Quality
Why DiSTeK?
Environmentally Friendly
Ecological and clean
The Distek™️ (Armorgalv®) process is much more environmentally friendly than the other known zinc-coating methods. It is a dry process, free of any chromium, acids, or other environmentally hazardous materials.
Award winner
The Distek™️ (Armorgalv®) coating process won the Pollution Prevention Award (MVP2) in 2006, presented by the US Environmental Protection Agency. Our process is approved in Europe, Asia, the USA, South Africa, Russia, and Australia.
No wastes
Our lines include a purification system for reusing the water, so there is no wastewater. The process does not contain hazardous materials, and nothing is thrown into the sewer. The powder mixture's remains can be resold to other industries, such as concrete and ceramics, or collected by us.
Why DiSTeK?
The Economical Choice
)’s corrosion-protection performance approaches stainless steel at a fraction of the cost. Since the entire process is ecologically-clean, there are no additional costs in handling environmental issues and wastes. Our lines are based on a closed system and include a purification facility for reusing the water. The use of electricity is only while the line is running, leading to significant energy usage savings. All those unique characteristics make our technology the economical choice.