Patent ID: 6264817
Filing Date: 2001-07-24
Classification: C25D,Y10S

Abstract:
A method for microplasma oxidation of valve metals and their alloys, including the following steps:immersion of the component in the electrolyte,application of an initial polarizing current power in an electric circuit, which is high enough to generate on the surface of the component, which is immersed in the electrolyte, moving microplasma discharges,holding of the component until the formation of a coating of a specific thickness, andremoval of a forming voltage and taking out the component and then rinsing the component, characterized in that the immersion of the component in the electrolyte is done at a constant speed which is determined by the relation:V=A.multidot.exp(B.multidot.N)with:V=immersion speed of the component, dm.sup.2 /min;N=output power of the power supply, N-(0.05-3).multidot.10.sup.5 (Volt.multidot.Ampere);A--(0.05-0.5)dm.sup.2 /min;B=(1.5-2.5).times.10.sup.-5 (1/Volt.multidot.Ampere),and after the formation of the coating is completed, the voltage in the electric current is lowered until isolated wandering microplasma discharges appear on the treated surface; and the treated surface of the component, which is immersed in the electrolyte, is held therein until complete extinction of the isolated wandering microplasma discharges occurs.