Vanconol® CCL-297 Multi-Metal Corrosion Inhibitor for Coolants
Product Overview
Vanconol® CCL-297 is a composite organic carboxylate multi-metal corrosion inhibitor designed for automotive engine cooling systems, suitable for ethylene glycol and propylene glycol based automotive antifreeze and long-life coolant systems. By forming a dense adsorbed protective film on the surfaces of metals such as aluminum alloys, cast iron, steel, copper and brass, the product effectively inhibits uniform corrosion, pitting and crevice corrosion, meeting the technical and service-life requirements of OEMs of passenger cars, commercial vehicles and construction machinery for long-life coolants.
Chemical Description
Composite organic carboxylate, water.
Mechanism of Action
- Selective adsorption at anodic active sites: carboxylate ions selectively adsorb onto the anodic active sites on the metal surface.
- Sparingly soluble coordination film and hydrophobic barrier: carboxylate groups coordinate with metal ions to form a sparingly soluble metal carboxylate complex protective film, whose non-polar hydrocarbon groups face the solution side, building a hydrophobic barrier that prevents corrosive media from contacting the metal.
General Properties
| Property | Range | Test Method |
|---|---|---|
| Appearance | Light yellow transparent liquid | Visual inspection |
| Active matter content | 55±2% | Oven drying method |
| pH value (as supplied) | 8-9 | GB/T22592 |
| Foaming properties | Low foam | SH/T 0066 |
Application Benefits
- Comprehensive multi-metal protection: synergistic inhibition of uniform corrosion, pitting and crevice corrosion on aluminum alloy cylinder heads, cast iron cylinder blocks, steel piping and copper/brass heat exchangers.
- Long-term stability: supports OEMs in extending antifreeze replacement intervals; the protective film remains stable and resists flaking under prolonged thermal cycling and oxygen-containing conditions.
- Good system compatibility: compatible with common components of ethylene glycol/propylene glycol coolants, with no precipitation or separation.
- Low foaming and foam control: reduces flow fluctuation, line vibration and loss of heat transfer efficiency caused by foam.
Recommended Applications
- Antifreeze and long-life coolants for passenger car engine cooling systems.
- Heavy-duty cooling systems for commercial vehicles, heavy trucks and construction machinery.
- Antifreeze for stationary and mobile power equipment such as agricultural machinery and generator sets.
- Standardized corrosion protection system upgrades and retrofits at coolant manufacturers supplying OEMs.
Handling Recommendations
- Wear personal protective equipment before use.
- Based on experimental data, the recommended dosage is 3-5%; it can simply be dissolved directly into the application system during addition.
Storage and Transportation
- Plastic drum packaging, 220 L net per drum.
- Store in a clean, cool and dry warehouse.
- Shelf life of two years at room temperature.