Defending Metal Integrity: Zerust Zerion FAN-6 Corrosion Protection

A leading cause of Aboveground Storage Tank (AST) failures is Soil Side Bottom (SSB) corrosion, which can compromise the structural integrity of the tank bottom. Proactive prevention is essential. While Vapor Corrosion Inhibitors (VCIs) extend tank floor life by protecting voids and soil side surfaces, eventual replacement becomes unavoidable.

How FAN-6 Strengthens Corrosion Protection

Soluble Corrosion Inhibitors (SCIs) work alongside VCIs to create an alkaline environment and neutralize acidic species. Zerion FAN-6 introduces a unique "Top Dressing" method where the inhibitor is applied directly to the tank foundation during downtime or before new floor plates are installed. For existing floors, FAN-6 solution can be injected through added ports.

Why Choose FAN-6

FAN-6 remains stable up to 851°C, preventing weld porosity and chemical breakdown during floor plate installation. This method can be combined with VCI protection before or after the tank returns to service for maximum protection.

Laboratory Testing Results

A one-year study evaluated various concentrations of Zerion FAN-6 in chloride-contaminated sand beds. Results showed higher FAN-6 concentrations significantly reduced corrosion, even under severe conditions.

Figure 1: After three months, higher FAN-6 levels showed reduced corrosion severity.

Figure 2: After one year, FAN-6 continued to protect against chloride-induced corrosion.

Key Features of Zerion FAN-6

• Neutralizes acidic species.
• Creates a stable alkaline environment.
• Applied as a powder or dissolved in solution.
• Non-hazardous and eco-friendly.
• Effective long-term corrosion protection at low concentrations.

Additional Benefits

• Works seamlessly with Vapor Corrosion Inhibitors (VCIs).
• Usable in concentrations from 0.5% - 10%.
• Thermally stable up to 851°C.

Conclusion

Zerion FAN-6 provides a reliable, cost-effective, and environmentally safe way to prevent SSB corrosion in ASTs. Its versatile application protects infrastructure and extends tank life.

Contact Zerust today to learn how FAN-6 can safeguard your tanks.