| Zinc chromate | |
|---|---|
| IUPAC name |
Zinc chromate
|
| Identifiers | |
| CAS number | 13530-65-9  |
| PubChem | 26089 |
| RTECS number | GB3290000 |
| Properties | |
| Molecular formula | ZnCrO4 |
| Molar mass | 181.403 g/mol |
| Appearance | yellow-green crystals |
| Density | 3.43 g/cm3 |
| Melting point |
316 °C |
| Boiling point |
732 °C |
| Solubility in water | insoluble |
| Hazards | |
| EU classification | not listed |
| (what is this?) (verify) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
|
| Infobox references | |
Zinc chromate, ZnCrO4, is a chemical compound containing the chromate anion. It is used industrially in chromate conversion coatings.
Its use as a corrosion resistant agent was applied to aluminium alloy parts first in commercial aircraft, and then in military ones. During the 1940 and 1950s it was typically found as the "paint" in the wheel wells of retractable landing gear on U.S. military aircraft, not because of its glaring yellow-green color symbolizing anything, but to protect the aluminium from corrosion.
When used as a pigment, it is known as Zinc Yellow or Yellow 36. It is highly toxic and rarely used in art anymore.
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