Electrospark Deposition (ESD) is a micro-arc welding process that welds material to a substrate often without causing a heat affected zone (HAZ). The material is deposited in molten “sparks” as electrical current is passed between the electrode and the surface. By varying the applicator and the electrical settings, one can join, coat and repair many similar and dissimilar materials with a true metallurgical bond.


Huys has the technical knowledge, experience, and support team to assist with virtually any material and substrate. Examples include: Tungsten ...

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Low Energy Welding Equipment

Patent Numbers: US 10,882,196 B2 / CA 2995658, US 10,829,856 B2 / CA 2712119, US 10,391,579 B2 / CA 2990246, ...
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Electrospark deposition is a micro-scale additive welding processes that:

  • Produces a true metallurgical bond with substrate
  • Keeps the substrate near ambient temperature; eliminating distortion, stress, and either reducing or preventing a heat affected zone
  • Allows for dissimilar materials to be joined
  • Produces consistent, thin layers
  • Can be used for surface modification for hardness, wear resistance, corrosion resistance, friction, etc.
  • Can be used an overlay for repair of worn, corroded, or defective components

Huys’ Low Energy Welding (LEW) equipment is the latest evolution of electrospark deposition. Some of its advantages are:

  • Portability for field operation
  • Available with or without shielding gas (to eliminate oxidation in the process)

4 Axis Automated Coating Machine.

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