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Plot 4, Sector 6, IMP Manesar, Gurugram, Haryana Postal code: 122051

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Zinc Thermal

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Zinc Thermal Diffusion

Advanced Protection Through Zinc-Iron Alloy Coating

Zinc Thermal Diffusion is a cutting-edge surface treatment technology designed to deliver exceptional corrosion resistance and durability. Through a high-temperature diffusion process, a zinc-iron alloy layer is formed directly on the surface of the metal, creating a metallurgically bonded coating that will not flake, chip, or peel — even under extreme conditions.
Unlike traditional electroplating or hot-dip galvanizing, Zinc Thermal Diffusion is a completely dry and eco-friendly process. It eliminates the need for liquid baths or chemical waste, making it both environmentally sustainable and operator safe. The result is a uniform, matte-grey finish with superior protection against corrosion, wear, and abrasion.
This technology is widely used in automotive, construction, defense, and industrial applications, particularly for components that must withstand harsh outdoor or chemical environments.
Renowned brands like ArmorGalv® by Distek have perfected this process, offering a proven alternative to traditional coatings with longer service life, reduced maintenance, and outstanding performance.

Zinc Thermal Diffusion is the future of surface protection — durable, sustainable, and engineered for performance that
lasts.

Key Benefits:

  • ● Exceptional corrosion resistance
  • ● Uniform, chip-free zinc-iron alloy coating
  • ● Environmentally friendly – no liquid effluents or toxic by-products
  • ● Excellent wear and abrasion protection
  • ● Ideal for complex geometries and threaded components

THERMAL ZINC DIFFUSION COATING (TZD)

TZD creates a zinc–iron alloy through a diffusion process, giving uniform, chip-proof, metallurgically bonded protection.

Key Benefits of TZD

  • ● 3000+ hours corrosion resistance
  • ● No peeling or cracking
  • ● Uniform coating on threads and internal surfaces
  • ● Eco-friendly, dry process
  • ● High abrasion resistance

 

Why choose Aum Dacro for Zinc Thermal Diffusion

One of the few Indian job coaters running Zinc Thermal Diffusion (ZTD) alongside zinc flake — a metallurgically bonded zinc-iron layer that won’t flake, chip or peel, even on threads and complex geometries.

  • Dedicated ZTD line run to the same IATF-audited quality system as our zinc-flake plants.
  • Coverage where flake struggles: the diffusion bond reaches into recesses, blind holes and internal threads for uniform protection.
  • One partner, honest advice: because we also run flake and plating, we point you to the right process for the part instead of forcing it onto one line.

If your part needs an abrasion- and impact-resistant finish that physically can’t delaminate, ZTD here is built for it.

Property

Zinc Flake

PTFE

Zinc
Thermal
Spray

Alkaline Zinc

Alkaline Zinc Nickel

Hot-Dip Galvanizing (HDG)

Application Method
Non-electrolytic (Dip-Spin/Spray)
Spraying, Coating
Thermal SprayingVery Good to Excellent (Cathodic/Ba rrier)
Electroplating

Electroplating

Immersion in Molten Zinc
Corrosion Protection Level
Excellent (Cathodic/Barrie r)
Good to Excellent (Barrier)
Very Good to Excellent (Cathodic/Ba rrier)
Good (Cathodic)
Superior (Cathodic)
Excellent (Cathodic/Barr ier)

Thickness
Range
($\mu$m)

Thin (5-15)
Varies greatlyGood to Excellent (Barrier)
Thick (50-500)
Thin (5-20)
Thin (5-15)
Thick (45-200)
Unique Selling Proposition (USP)
Absence of Hydrogen Embrittlement Risk (Ideal for high-strength steel fasteners)

Extremely
Low
Coefficient
of Friction
(Non-Stick)
& Excellent
Chemical
Resistance

Ability to Coat Extremely Large Structures On-Site
Exceptional Throwing Power and Uniform Coverage on Complex Parts
Highest Corrosion Resistance of Electroplated Coatings (Often >1000 hrs salt spray)
Metallurgical Bond & Most Cost-Effectiv e Long-Term Solution for Structural Steel