The zinc powder with Total zinc: 98.5% min
Metal zinc:96% min
Pb: 0.002%
Cd:0.02% max
Fe: 0.002%
The zinc powder with density7.14g/cm³,melting point 409°C boiling point 907°C dissolving in acid,alkali,,and ammonia water but not in water It has strong reductibility and adhesive power. It remains stable in dry air but tends to agglomerate in moist and results in alkaline carbonate on the surface of the particle.
Standard for Chemical Components and Particle Size of Zine Powder
chemical component | Sort | Standard | All Zinc % | Metal Zinc % | Lead Pb% | Cadmium Cd% | Iron %Fe | Acid Insolubles% |
Premium grade | ASTM D520 Type 3 | ≥99.0 | ≥96.0 | ≤0.002 | ≤0.001 | ≤0.002 | ≤0.01 | |
Low Pb grade | ASTM D520 Type 2 | ≥98.5 | ≥96.0 | ≤0.01 | ≤0.05 | ≤0.01 | ≤0.03 | |
State grade | GB/T6890-2000 | ≥98.5 | ≥96.0 | ≤0.1 | ≤0.1 | ≤0.05 | ≤0.05 | |
Particle Size | Sort | Specification | Nominal Particle Size(mesh) | Average Particle size | Max Size | Residue On Sieve | ||
+200(mesh) | +325(mesh) | +500(mesh) | ||||||
Super fine | WLZn-500 | -500 | 5~7 | ≤30 | None | ≤0.01% | ≤0.3% | |
WLZn-400 | -400 | 6~8 | ≤38 | None | ≤0.05% | - | ||
WLZn325 | -325 | 7~9 | ≤45 | None | ≤0.1% | - | ||
Coarse grade | WLZn-200 | -200 | - | ≤75 | ≤0.3£¥ | - | - | |
Transportation:
Stored in dry, airy warehouse without acid, alkali and inflammables. Be cautious of moisture, water and fire during storing and transportation.
