High-frequency characteristics of a jet electrolyte-plasma discharge

In this work, the issues of contact interaction of a low-temperature electrolyte plasma with the surface of a metal anode at atmospheric pressure are considered. Considered is the measurement of the duration of the pulses of the electrolyte-plasma discharge created with the help of an electrolyte jet directed to the anode from a copper tube playing the role of a hollow cathode, with an inner diameter of 3 mm, at a volumetric flow rate of an electrolyte of 2-90 l/h and an interelectrode gap of 2-30 mm, forms electric discharges of different duration. Oscillography made it possible to record the main frequency-pulse characteristics of the electrolyte-plasma discharge. The minimum values of the pulse duration of electrolyte-plasma discharges were obtained for low volumetric electrolyte flow rates of 2-6 l/h. It is shown that for the given values of the pulse duration, a surface with a low roughness parameter Ra≥0.034 µm is formed. These studies make it possible to rely on the industrial application of the results obtained in superfinishing and dimensional processing of products such as cardiac stents, implants, as well as turbine blades, blisks, impellers, and gear wheels.