Using it for creating an ultralight watch mechanism is a pure innovation for the watch industry. In other words, aluminum is truly the material of today – and tomorrow. In the Car Aston Martin, Lotus, Jaguar or Audi are cocooned in an aluminum space frame. Drivers’ safety is also likely to depend on it, airbag deployment doors, side impact members and crash management systems made from aluminum. Anodized aluminum is now fashionable as a design statement in car interiors with many interior finishes and accessories exhibiting that brushed silver appearance of anodized aluminum –scratch resistance, ease of cleaning and recyclability being additional benefits.
There are normally four stages in the process: pre-treatment, anodizing, coloring (where required) and sealing. The electrolytic process takes place once the metal surface has received the appropriate mechanical or chemical pre-treatment and has been thoroughly cleaned. The profile is connected to a direct current source and becomes the anode (hence anodizing). An electrolytic cell is formed. Dilute Sulphur acid at room temperature is normally used as the electrolyte. During electrolysis, the surface of the metal is oxidized. The process continues until the desired layer thickness (usually 5 – 25 μm) is reached.