Often referred to as hex chrome, hexavalent chromium is a form of the metallic element chromium, commonly used in manufacturing. Chromium is especially useful for its corrosion resistance, hardness and durability. Other names for hex chrome include chromium(VI), chrome VI, chromium 6, chromium(6+) and Cr VI. Hexavalent chromium compounds contain the element chromium in the +6 oxidation state.