Chromium


Metallic surface coatings (electro-plating)
Steel, Hardware tools
Camouflage paintings, lasers
Audio and video tapes

The chromates and the dichromates have a lot of applications. They are used in tanning, as mordants, in dye production, as wood preservers, in the production of pigments used against metal corrosion (electroplating), etc.

In the electroplating process, the metallic pieces take a bath in a CrO3 solution. An electrical current is then passed through the metallic pieces (cathode) and the anode, also immersed in the solution and usually made of a lead-antimony alloy. The plating takes place in a fine coating around the metallic pieces.