Molybdate Passivation Agent
CAS Number: 7631-95-0
Molybdate passivation agent based on sodium molybdate produces a thin, greenish-yellow conversion coating on zinc and zinc alloy electroplated substrates, offering a hexavalent chromium-free alternative with good corrosion protection. Molybdate ions form an insoluble molybdate film on the metal surface that provides anodic inhibition and seals micro-porosity in zinc deposits. The product is valued for its low toxicity, good environmental profile, and compatibility with subsequent lacquer or wax sealants.
Technical Specifications
| pH | 3.5-5.0 |
| appearance | Pale yellow to colourless liquid |
| film color | Light green to yellowish |
| active content (%) | ≥40 |
| MoO4²⁻ content (g/L) | 5-20 |
Applications
- Zinc and zinc alloy electroplate passivation
- Industrial hardware eco-friendly surface protection
- Electrical components and connectors passivation
- Decorative zinc plated parts with green passivation
- Post-treatment for phosphated steel surfaces
Key Features
- Chromium-free anodic inhibition passivation mechanism
- Low toxicity with straightforward wastewater treatment
- Compatible with organic topcoat sealants for improved corrosion resistance
- Stable bath chemistry with long service life
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CAS Number
7631-95-0
Category
Metal Surface TreatmentAvailability
In StockSample
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