Process for obtaining hard oxide layers on the surface of a light metal based substrate

摘要

Production of hard oxide layers on the surface of a substrate based on light metals, e.g. Al, Ti, Mg, Be or alloys comprises immersing the substrate as an electrode together with a counter electrode into an electrolyte fluid and applying an electrical voltage discontinuously by switching the voltage on and off. This switching on the performance of the voltage source are measured in such a way that the thickness of the substrate for the oxide formation is heated to a temperature above the melting point of the substrate.