Chromic Oxide (Electroplating Grade)
Overview
Chromic Oxide (Electroplating Grade) is a specialized form of chromium(III) oxide optimized for electroplating applications. It is prized for its ability to form durable, corrosion-resistant chrome coatings on metal substrates. The electroplating grade is distinguished by its high purity (>99%) and controlled particle size distribution, ensuring consistent performance in plating baths. This compound is chemically inert under normal conditions, making it stable for long-term storage and handling. Unlike hexavalent chromium compounds, trivalent chromium oxide (Cr₂O₃) is environmentally preferable due to its lower toxicity profile, aligning with modern regulatory standards.
Physical and Chemical Properties
Chromic Oxide (Electroplating Grade) exhibits exceptional thermal stability, with a melting point of 2435°C and a boiling point around 4000°C. Its density of 5.22 g/cm³ contributes to its effectiveness in dense, wear-resistant coatings. The compound is insoluble in water and most solvents but can dissolve in strong acids, a property leveraged in some plating formulations. Its dark green crystalline form provides uniform dispersion in plating solutions, while its high refractive index enhances the reflective quality of finished chrome surfaces. The material’s hardness (Mohs scale 8-9) further supports its use in abrasion-resistant applications.
Main Applications
The primary use of Chromic Oxide (Electroplating Grade) is in decorative and functional chrome plating for automotive parts, tools, and household fixtures. It serves as a precursor in trivalent chromium plating baths, which are increasingly replacing hexavalent chromium due to stricter environmental regulations. Beyond electroplating, it is employed in refractory ceramics, green pigments for coatings, and as a catalyst in organic synthesis. Its thermal stability makes it suitable for high-temperature coatings on aerospace components, while its inertness lends itself to use in corrosion-inhibiting paints.
Safety and Storage
While Chromic Oxide (Electroplating Grade) is less toxic than hexavalent chromium compounds, precautions are necessary to avoid dust inhalation or prolonged skin contact. Use NIOSH-approved respirators and gloves when handling powders. Storage should be in sealed containers away from reducing agents or strong acids to prevent unintended reactions. Spills should be contained and cleaned with minimal dust generation. Although not classified as hazardous waste, disposal should comply with local regulations. Suppliers typically provide Safety Data Sheets (SDS) with detailed handling instructions.
B2B Procurement Guide
When sourcing Chromic Oxide (Electroplating Grade), prioritize suppliers with ISO 9001 certification and batch-specific purity analysis (typically 99-99.9%). Key specifications include particle size (1-10 microns for most plating applications) and trace metal content (e.g., iron, sulfur) that could affect plating quality. Bulk purchases (500 kg+) often reduce costs by 15-20%. Verify logistics compatibility—the material is non-hazardous for transport but may require moisture-proof packaging. Leading producers are located in China, Germany, and the U.S., with regional pricing variations based on local chromium ore availability.
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