Zinc Chromate (Zinc Chromium Oxide) (ZnCrO4)-Powder

Characteristic




Zinc chromate, ZnCrO4, is a chemical compound containing the chromate anion, appearing as odorless yellow powder or yellow-green crystals, but, when used for coatings, pigments are often added.




Chemical formula：ZnCrO4

Molar mass：181.403 g/mol

Appearance：yellow-green crystals; yellow powder

Density：3.43 g/cm3

Melting point：316 °C (601 °F; 589 K)

Boiling point：732 °C (1,350 °F; 1,005 K)

Solubility in water：insoluble







Application




Zinc chromate’s main use is in industrial painting as a coating over iron or aluminum materials.




When used as a pigment, it is known as Zinc Yellow, Buttercup Yellow or Yellow 36. It is rarely used in art because the pigment degenerates into a brown color.




Zinc chromate putty was used as sealant in addition to two O-rings between sections of the failed solid rocket booster on Space Shuttle Challenger.