The hard oxidation of aluminum is a process of electrolytic oxidation. In this process of aluminum insulation jacketing, the surface of aluminum and aluminum alloy is usually transformed into a layer of oxide film in this process. The oxide film has protective, decorative and some other functional properties. The hard oxidation of aluminum from this definition only includes the process of forming hard oxide film.
In addition to the color problem caused by some starting, the appearance is very difficult to see. It is mainly determined by the test of salt fog, friction resistance, electrical conductivity, electric shock and so on.
Process: remove oil - Wash - Wash - hard - Wash - close - bake.
That is to say, after oxidation, the metal will form a dense oxide film to prevent water and air from eroding.
