Hexafluorozirconic Acid
Hexafluorozirconic Acid (H2ZrF6, CAS 12021-95-3), 45–50% solution, supplied wholesale by Zyntex. Raw material for phosphate-free zirconium conversion coatings, aluminum treatment and fluorozirconate salts. CoA and SDS.
Description
Hexafluorozirconic Acid Product Overview
Hexafluorozirconic acid (H2ZrF6) is supplied as a clear, colorless 45–50% aqueous solution with a specific gravity of about 1.51. It is strongly acidic and corrosive.
Its main application is in thin-film zirconium conversion coatings. Diluted pretreatment baths deposit a very thin zirconium oxide layer on steel, zinc and aluminum, which improves paint adhesion and corrosion resistance. Compared with conventional zinc phosphating based on Phosphoric acid, these processes run at lower temperatures, produce little sludge and contain no heavy metals, so automotive and appliance producers have widely adopted them.
Hexafluorozirconic acid also serves as a raw material for fluorozirconate salts such as Sodium Hexafluorozirconate and in aluminum surface treatment. For other fluoride chemicals, see Zirconium fluoride and Potassium Fluoride.
Key Applications of Hexafluorozirconic Acid
Main application areas:
🚗 Metal Pretreatment
Zirconium conversion coatings before painting.
🔩 Aluminum Treatment
Surface treatment of aluminum parts.
🧪 Fluorozirconates
Raw material for sodium and potassium fluorozirconates.
🏭 Coil Coating
Pretreatment component for coil coating lines.
Hexafluorozirconic Acid Technical Specifications
| Parameter | Standard Value |
|---|---|
| Product Name | Hexafluorozirconic Acid (H2ZrF6) |
| CAS Number | 12021-95-3 |
| EC Number | 234-666-0 |
| Concentration | 45% – 50% Aqueous Solution |
| Specific Gravity | ~ 1.51 g/cm³ |
| Documents | CoA and SDS with every lot |
⚠️ Safety & Handling: Causes severe skin burns and eye damage and is harmful if swallowed or inhaled; can release hydrogen fluoride. Wear acid-resistant gloves, a face shield and protective clothing, and keep calcium gluconate gel available as first aid. Store in closed polyethylene containers, away from glass, metals and bases. Always consult the Safety Data Sheet (SDS) for full classification and handling instructions.
Frequently Asked Questions
Why are zirconium pretreatments replacing zinc phosphating?
They work at room or low temperature, produce very little sludge, contain no nickel or zinc, and reduce energy and wastewater costs while giving good paint adhesion.
Which containers are suitable for storage?
Use polyethylene or other fluoride-resistant plastic containers. Glass and most metals are attacked by the acid.
How can I get a price and documents?
Prices depend on quantity, packaging and destination. Contact us with your required volume to receive a quotation together with the CoA and SDS.
