Pulsed power supply for plasma electrolytic deposition and other processes


Plasma electrolytic deposition is a process for electrolytically coating a conductive (metal) surface with a hard, glassy, corrosion-resistant protective layer such as a ceramic coating. The coating property and quality of the process is determined by many factors such as composition and concentration of the electrolytes, applied electrical voltage, current density and duration. Because these surface coatings can provide high hardness and a continuous barrier, they can offer protection against wear, corrosion or heat as well as electrical insulation. This invention is a pulsed power supply for plasma electrolytic deposition for generating pulsed direct current for controlled interruption of the arcing process of plasma electrolytic deposition.

Technology transfer

This technology is available for licensing. There is an opportunity for this invention to be developed for particular applications and for demonstration of the final product through a collaborative research project. The business opportunity may be referred to by its NRC ID: 12103.

Market applications

Applications for this technology are extensive including: transportation, aerospace, marine and construction.

How it works

The surface coating generated by this technique is actually a chemical conversion of the substrate metal into its oxide. Because of this in-situ conversion process the coatings have strong adhesion to the substrate metal comparing to conventional deposited coatings. Plasma electrolytic deposition has features that enables it to form some special surface structures such as for example metastable high temperature phases, nonequilibrium solid solutions, and glassy glasses. These special structures can be designed for a wide spectrum of protective coatings.


  • Lower material cost and high efficiency
  • A wide range of metal substrates can be coated
  • Metal surfaces can be saturated by non-metallic elements
  • Can be used for nitriding, carburizing, boriding and carbonitriding
  • Can reach temperature as high as 2 X 104 degrees Celsius rapidly
  • Capability of providing a high power pulsed DC source for controlled interruption of the arching process



To inquire about this technology, please contact:

David Fraser, Business Advisor
Telephone: 613-991-9972
Email: David.Fraser@nrc-cnrc.gc.ca

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