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NALFLEET™ Rocor NB Liquid
ROCOR NB LIQUID for Engine cooling water system
Pack Size - 25 LTR
Wilhelmsen ROCOR NB Liquid is a corrosion inhibitor for marine cooling systems, protecting metals from corrosion, scaling, and cavitation. Easy to use, it enhances efficiency and is approved by major manufacturers.
NALFLEET™ Rocor NB Liquid is a proprietary blend of active corrosion inhibitors, formulated to provide optimum protection for ferrous and non-ferrous metals in engine cooling water systems. The product is specially designed to prevent electrolytic corrosion, cavitation, and erosion, ensuring long-term system integrity.
Applications:
🔹 Diesel engine cooling systems
🔹 Compressor cooling systems
🔹 Centralized cooling systems
🔹 Hot water heating systems
🔹 Auxiliary machinery cooling systems
NALFLEET™ Rocor NB Liquid forms a stable oxide film on metal surfaces, offering excellent corrosion resistance without harming seals, gaskets, or hoses. It is compatible with glycols for freeze protection, making it ideal for vessels operating in cold environments.
Specification
General
Invent Hazard Material (IMO/EU) classification | C-7 |
Physical properties
Appearance | Red liquid |
Density [g/ml] | 1.1 |
Form | Liquid |
pH | 9.5 - 10.5 |
Technical data
Not Compatible | Avoid contact of neat product with zinc and aluminium. |
Key Features
1] Prevents Electrolytic Corrosion – Forms a protective oxide layer on metal surfaces
2] Effective Against Cavitation and Erosion – Extends equipment lifespan
3] Compatible with Glycols – Provides freeze protection when required
4] Non-Damaging to Seals & Gaskets – Safe for most non-metallic components
5] Liquid Form for Easy Dosing – Ensures hassle-free application
6] Maintains Optimal pH Levels (8.0 - 11.0) – Prevents acid corrosion
Benefits
1] Manufacturer Approved – Used by major diesel engine manufacturers
2] Easy Testing & Maintenance – Simple control test kits available
3] Safe for Most Materials – Does not harm gaskets, hoses, or seals
4] Prevents System Downtime – Reduces corrosion-related failures
5] Compatible with Distilled Water – Helps maintain low chloride levels
How to Use
🔹Pre-clean the system using Unitor™ Seaclean Plus (for degreasing) and Unitor™ Descalex (for scale removal) if required.
🔹Dose ROCOR NB Liquid at a recommended concentration of 9–21 L/m³, depending on system requirements.
🔹Ensure proper circulation when adding the product to the expansion tank.
🔹Regularly test the nitrite levels using the Spectrapak Test Kit and adjust dosage to maintain levels between 1,000–2,400 ppm.
Use distilled water for make-up water to keep chloride levels below 50 ppm.
For freeze protection, mix with glycols as per system requirements.