Coating and Overlay Systems
by Electro-Spark Deposition

The SparkDepo process is a revolutionary method of renewing worn surfaces by deposition of wear resistant materials with electric sparks.
SparkDepo coatings of tungsten carbide and chromium carbide can prolong the lives of machine parts, dies, molds, and tools that are subjected to wear, heat and corrosion. Thick alloy deposit is also possible for repair and maintenance.
Frequent repair and maintenance can be reduced or even eliminated by using SparkDepo, thus increasing productivity or reducing the production cost.
SparkDepo is easy to operate, portable, and economical. It can be used on-site and in confined areas. The coating is produced under very low heat input but has a very high bond strength.

SparkDepo is employed to deposit consumable electrodes made of alloys and intermetallic compounds on the work piece by means of electric sparks at frequencies of 10 to 1,000 per second for 10-6 to 10-5 seconds per spark.
Direct current from the power supply will heat the electrode to 8,000 to 25,000 degrees C only at the contact areas and transfers a small quantity of the electrode to the work piece under an ionized state and produces a strong metallurgical bonding.