Patent ID: 8163156

Claim:
A method of oxide-ceramic coating of an article comprising: immersing the article into an electrolyte solution in a container, wherein the electrolyte solution comprises a solvent having a vapor pressure; connecting the article immersed in the electrolyte solution in the container to a power supply as an anode; connecting the container or an electrode immersed in the electrolyte solution to the power supply as a cathode; hermetically sealing the container; creating above the electrolyte solution in the hermetically sealed container a gas pressure substantially equal to the vapor pressure of the solvent of the electrolyte solution; and while the gas pressure above the electrolyte solution in the hermetically sealed container is substantially equal to the vapor pressure of the solvent of the electrolyte solution, applying a sufficient power-supply voltage between the article and the cathode to form gas bubbles on a surface of the article thereby blocking a part of the surface and, in the presence of the gas bubbles on the surface, to generate micro-plasma discharges to form oxide-ceramic coating on a the surface of the article.