Calcium Nitrite Concrete Corrosion Inhibitor
CAS Number: 13780-06-8
Calcium nitrite is the most widely proven anodic corrosion inhibitor for steel reinforcement in concrete, passivating the steel surface and raising the chloride threshold concentration required to initiate corrosion. Applied at 10–30 L/m³, it can extend the service life of reinforced concrete structures in chloride-rich environments (marine, de-icing salts) by 2–4 times. It also provides a mild early-strength acceleration effect.
Technical Specifications
| pH | 11.0-12.0 |
| appearance | Clear to slightly hazy liquid |
| specific gravity | 1.26–1.28 |
| chloride content (%) | ≤0.05 |
| calcium nitrite content (%) | 30±1 |
Applications
- Marine and coastal reinforced concrete structures
- Bridges and infrastructure exposed to de-icing salts
- Parking structures with high chloride exposure
- Precast concrete elements in aggressive environments
- Concrete rehabilitation and repair in chloride-laden conditions
Key Features
- Anodic inhibitor that passivates reinforcement surface effectively
- Raises chloride threshold to delay and prevent corrosion initiation
- Dual benefit: corrosion protection and mild early-strength gain
- Most extensively field-tested corrosion inhibitor in concrete
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