Vanconol®CPI-AP Copper Corrosion Inhibitor — Product Data Sheet

🎯 Abstract

Vanconol® CPI-AP is a new-generation, high-performance multifunctional metal corrosion inhibitor developed through chemical modification of the traditional copper corrosion inhibitor tolyltriazole (TTA). By introducing piperazine active groups, this product retains the excellent copper corrosion inhibition of TTA while significantly improving water solubility and dispersibility in various demanding media, as well as enhancing protection across multiple metals. It forms a denser and more stable protective film on metal surfaces, delivering superior corrosion protection, particularly suited for complex water systems and operating environments where conventional TTA may fall short.

📊 Key Product Information

Item	Specification / Description
Appearance	Reddish-brown liquid
Solid content, 105°C 4h/%	75
Density 20°C/g/cm³	1.0–1.2
Kinematic viscosity 40°C/mm²/s	230–250
Pour point/°C	< −10°C

Key Advantages   

Excellent corrosion inhibition performance with rapid, uniform film formation;

Superior water solubility — miscible with water in any ratio, suitable for automated dosing;

Broad pH operating range (5.5–10), outperforming conventional BTA under low-pH conditions;

Multi-metal protection, well suited for systems with mixed metallurgy;

Good formulation compatibility with most water-treatment chemicals

🛠️ Application Guide

Recommended Applications

Application Area	Use Cases and Performance Description
Industrial recirculating cooling water systems	Functions as the primary corrosion inhibitor in open or closed recirculating cooling water systems, protecting heat-exchanger copper tubes, piping, and other components. Its water solubility ensures rapid distribution throughout the system, delivering particularly strong performance in closed-loop cooling systems. Recommended dosage: 2–10 mg/L (as active matter); for systems already showing corrosion, an initial pre-film passivation dose of 5–10× the normal concentration is recommended.
Rust-preventive oils and lubricants	As a high-efficiency additive, dissolves directly in rust-preventive oils/greases or lubricants, providing long-term vapor-phase and contact rust protection for metal components while enhancing overall lubricant performance.
Automotive antifreeze / coolants	Acts as a corrosion-inhibiting component, effectively protecting brazed copper joints, brass radiators, and other components in automotive cooling systems, extending engine cooling-system service life.
Other applications	Can be used as a plating bath additive to improve deposit quality; as a metal stabilizer in coatings and plastics, among other uses.

Use and Recommended Dosage

Dosing method: This product is a water-soluble liquid that can be added directly to the system or fed continuously and precisely using a metering pump after dilution.

Initial concentration (pre-film treatment): For new systems or those already corroded, an initial dosage of 50–100 mg/L (as product) is recommended, with recirculation for 24–48 hours to establish a complete protective film.

Maintenance concentration: During normal operation, maintain a concentration of 2–10 mg/L (as active matter); the exact dosage should be determined through testing based on water quality, temperature, and system metallurgy.

Compatibility: This product is compatible and can be formulated with a wide range of common scale inhibitors, dispersants, and biocides/algicides, and often shows synergistic effects with corrosion inhibitors such as mercaptobenzothiazole (MBT). However, compatibility testing is recommended before blending with other water-treatment chemicals (e.g., polymeric scale inhibitors) to ensure no precipitation occurs.

⚠️ Safety and Storage

Packaging: Available in 25 kg and 200 kg plastic drums, or customized packaging upon request.

Storage: Keep sealed in a cool, ventilated, and dry place, away from direct sunlight. This product is hygroscopic; reseal promptly after opening.

Shelf life: 12 months.

Safety precautions: Wear appropriate personal protective equipment, such as protective gloves and safety goggles, when handling. In case of skin or eye contact, rinse immediately with plenty of water. Refer to the Safety Data Sheet (SDS) for detailed safety information.

❓ FAQ

Q: What are the key advantages of this product over conventional TTA?
A: The key advantages are threefold: first, significantly improved water solubility — miscible with water in any ratio, requiring no pre-dissolution and suitable for automated dosing; second, a broader pH operating range (5.5–10) with better corrosion inhibition than conventional BTA under low-pH conditions; and third, broader protection coverage — beyond copper and copper alloys, it also provides good corrosion inhibition for various non-ferrous and ferrous metals.

Q: What is the recommended dosage in industrial recirculating cooling water systems?
A: The normal maintenance concentration is 2–10 mg/L (as active matter); for systems already corroded, an initial pre-film passivation dose of 5–10× the normal concentration is recommended.

Q: Which chemicals can this product be formulated with, and what should be noted?
A: It is compatible with most common scale inhibitors, dispersants, and biocides/algicides, and can produce synergistic effects with corrosion inhibitors such as MBT. Compatibility testing should be performed before blending to ensure no precipitation occurs.

Q: How should leftover product be stored after opening?
A: This product is hygroscopic; reseal the container promptly after opening and store in a cool, ventilated, dry place away from direct sunlight. Use within the 12-month shelf life.

📞 Contact Us and Documentation

For the Safety Data Sheet (SDS), detailed application recommendations, or business inquiries, please contact us: