The Process


The Distek™️ company developed the ArmorGalv® Thermal Zinc Diffusion coating technology in 1993. This process is an updated and innovative 21st-century form of the well-established sherardizing process.

The ArmorGalv® technology uses a new saturating mixture with unique properties. The process is based on mixing metal parts with the patented dry alloyed zinc-powder and dry heating inside the oven at 320-470° C while mixing them in slowly-rotating, sealed containers.

The process involves the diffusion of dry alloyed zinc powder into the metal parts’ surface, resulting in multiple layers of Zn/Fe Alloy from the superior corrosion resistant Gamma layer to a compact Delta layer followed by the Zeta layer.

TZD forms multiple layers 002

Each layer is harder and more corrosion resistant than the previous.

The second major innovation of the ArmorGalv technology is the passivation (finishing) process, which involves patented chromate-free solutions. The passivation is an integral part of the coating process, strengthens the corrosion resistance, and making the part’s surface hard and smooth. The coating’s characteristics are perfectly combined with all types of finishing coverings and paints.

Technical Information

Thermal Diffusion Galvanizing

Click to access:

ArmorGalv Introduction Booklet

ArmorGalv Coating Hardness test

Armorgalv  In-Ground Performance Report

ArmorGalv Corrosion resistance thickness anomaly

ArmorGalv EPA report

ArmorGalv - a Dream Come True for Fastener Coaters and Users?

Hydrogen Embrittlement Test

Next generation technology for corrosion
protection - 2014 Coal Conference

Thermal Zinc Diffusion Coating

ArmorGalv - the Green solution to corrosion

ArmorGalv Coating Characteristics Compared with Other Zinc-based Metallic Coatings

Thermal Diffusion Galvanizing Comparative 1500 Hr B117 Salt Spray Results

Features and Benefits of ArmorGalv Thermal Zinc Diffusion

Thermal Zinc Diffusion Galvanising Rebar Bending Test

Corrosion performance in various environments

Enhanced Performance Zinc Coating for Steel in

Thermal Zinc Diffusion Galvanizing Report

Orange Staining – The Youth Phase (Zinc Oxidation)



The coating conforms to the following standards:

  • ASTM A 1059A/ 1059M – 08 
  • BS-EN 17668:2016
  • AS-NZS-ISO-17668-2022


  You can find more technical materials and information about our process and technology in the global ArmorGalv website.

Common questions