Chromium trioxide in the Spotlight

Chromium trioxide is mainly used in chrome-plating. It is typically employed with additives that affect the plating process but do not react with the trioxide. The trioxide reacts with cadmium, zinc, and other metals to generate passivating chromate films that resist corrosion. It is also used in the production of synthetic rubies. Chromic acid solution is also used in applying types of anodic coating to aluminum, which are primarily used in aerospace applications. A Chromic Acid/Phosphoric Acid solution is also the preferred stripping agent of anodic coatings of all types. Source: Wikipedia