Calcium chromate (CaCrO4) is an inorganic ceramic compound composed of calcium and chromate ions, belonging to the family of metal chromate ceramics. It is primarily used as a corrosion inhibitor pigment in protective coatings, primers, and rust-preventive paints for steel and aluminum substrates in aerospace, automotive, and infrastructure applications. The material is valued for its ability to passivate metal surfaces and provide long-term corrosion protection, though its use has declined in some regions due to environmental and health regulations concerning hexavalent chromium compounds; engineers often evaluate it against alternative inhibitor pigments such as zinc phosphate or strontium aluminum polyphosphate when regulatory compliance is a concern.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 80.16 | GPa | — | ||
Poisson's Ratio(ν) | 0.3300 | - | — | ||
Shear Modulus(G) | 38.87 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 3.119 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 2.161 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Seebeck Coefficient(S) | -241 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | -2.575 | eV/atom | — |