Zinc Salt Corrosion Inhibitor
Zinc sulfate and zinc chloride are cathodic-type corrosion inhibitors widely used in cooling water programs to protect carbon steel and other metals. Zinc ions precipitate as zinc hydroxide at cathodic sites on metal surfaces, forming a protective barrier against oxygen corrosion. Zinc salts are highly effective when combined with anodic inhibitors such as phosphonates and azoles.
Technical Specifications
| purity | ≥98% (zinc sulfate heptahydrate) |
| appearance | White crystalline powder or clear solution |
| heavyMetal | ≤20 ppm |
| zincContent | 22–23% (as ZnSO₄·7H₂O) |
| pH (5% solution) | 4.5–5.5 |
Applications
- Cooling water carbon steel corrosion inhibition
- Combined programs with phosphonate scale inhibitors
- Industrial circulating water system protection
- Once-through and open recirculating cooling systems
- Low-hardness water corrosion control
Key Features
- Effective cathodic corrosion inhibitor for carbon steel
- Low cost and readily available
- Strong synergy with phosphonate and azole inhibitors
- Rapidly forms protective zinc hydroxide film at cathodic sites
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