Overview
Electrolytic chromium flakes are high-purity metallic chromium particles produced through the electrolysis of chromium salts. This method ensures minimal impurities, making them ideal for demanding industrial applications. Chromium's exceptional hardness, corrosion resistance, and high melting point make it a critical material in advanced manufacturing sectors. Produced primarily in China, Russia, and South Africa, electrolytic chromium flakes are traded globally in standardized particle sizes (typically 1-10mm). Their production adheres to strict metallurgical standards, with purity levels often exceeding 99%, suitable for aerospace and specialty alloy applications.
Physical and Chemical Properties
Electrolytic chromium exhibits a characteristic silver-gray luster with a density of 7.19 g/cm³, ranking among the heavier industrial metals. Its crystalline structure provides remarkable stability up to 1907°C (melting point), outperforming many alloying elements in high-temperature environments. The metal's passivation behavior creates a protective oxide layer when exposed to air, granting outstanding corrosion resistance. While insoluble in water, chromium flakes react vigorously with strong acids (hydrochloric, sulfuric) to form chromium salts. This reactivity necessitates careful handling to prevent dust formation, which poses inhalation hazards.
Main Applications
In metallurgy, electrolytic chromium serves as a crucial alloying element in stainless steel (typically 10-30% content) and superalloys for jet engines, enhancing corrosion and oxidation resistance. The aerospace industry utilizes high-purity flakes (99.9%+) for turbine blade coatings and structural components. The chemical sector employs chromium flakes as catalysts in polyethylene production and organic synthesis. Electroplating operations use dissolved chromium to create hard, decorative coatings on automotive parts and consumer goods. Emerging applications include additive manufacturing powders and advanced battery technologies.
Safety and Storage
Chromium metal dust presents inhalation risks (TLV 0.5 mg/m³ for metal) and requires NIOSH-approved respirators during handling. Facilities must implement dust suppression systems and HEPA filtration to meet OSHA standards for hexavalent chromium prevention. Store flakes in sealed, moisture-proof containers (preferably nitrogen-purged) away from acids and oxidizers. Warehouses should maintain relative humidity below 40% to prevent surface oxidation. Spills require collection with non-sparking tools and disposal as regulated metal waste under RCRA guidelines.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification and batch-specific purity analysis (ICP-MS reports). Standard packaging includes 25kg steel drums with plastic liners or 1-ton super sacks for bulk orders. Technical specifications should verify: 1) Purity (industrial grade ≥99%, aerospace grade ≥99.9%), 2) Particle size distribution (custom sieving available), 3) Oxygen content (<500 ppm for welding applications). Lead times typically range 2-8 weeks for large orders, with spot market availability subject to global chromium ore supply fluctuations.
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