VanconolCPI-MI Copper Corrosion Inhibitor

🎯 Summary

Vanconol CPI-MI is an imidazoline-modified benzotriazole corrosion inhibitor, representing a new-generation high-performance metal corrosion inhibitor developed through molecular structural optimization of conventional benzotriazole (BTA). By introducing imidazoline active groups, this product retains the excellent copper corrosion inhibition performance of BTA while significantly improving water solubility and enhancing protection for steel and other metals, addressing the limitations of conventional BTA—namely its limited water solubility (approximately 25 g/L at 20°C) and its primary suitability for copper and copper alloys. It forms a denser and more stable protective film on metal surfaces, providing comprehensive corrosion protection for multi-metal systems.

📊 Key Product Information

Parameter	Specification/Description
Appearance	Dark red liquid
Solid content, 105°C/4h/%	80
Density, 20°C/g/cm³	1.0–1.2
Kinematic viscosity, 40°C/mm²/s	140–170
Pour point /°C	< −10°C

Key Advantages   

1. Broad-spectrum multi-metal protection—highly effective for copper and copper alloys, and also excellent for ferrous metals such as steel and galvanized steel;

2. Efficient film formation with a dense, stable protective layer;

3. Excellent water solubility, allowing direct dosing and compatibility with automated feed systems;

4. Wide pH applicability (5.5–10.0) for strong adaptability across operating conditions;

5. Good formulation compatibility, providing synergistic effects with a range of water treatment chemicals.

🛠️ Application Guide

Recommended Application Areas

Application Area	Application Scenarios and Benefits
Industrial recirculating cooling water systems	Serves as the primary corrosion inhibitor for open and closed recirculating cooling water systems, particularly suited to heat exchange systems containing copper tubes and carbon steel equipment. Its excellent water solubility ensures rapid and uniform distribution, providing effective protection for both copper alloys and carbon steel. Recommended dosage: 2–10 mg/L (as active matter).
Rust-preventive oils and lubricant additives	Functions as a high-performance multifunctional additive in rust-preventive oils (greases), extreme-pressure industrial gear oils, anti-wear hydraulic oils, and greases, providing comprehensive anti-rust and anti-corrosion protection for metal components.
Automotive antifreeze/coolant	As a key corrosion-inhibiting component in automotive engine coolants, it effectively prevents corrosion of multiple metals in the cooling system, including copper brazed joints, brass radiators, steel components, and aluminum engine blocks.
Other applications	1. Metalworking fluids: used as a corrosion inhibitor in cutting oils and emulsions to prevent rust on machined parts; 2. Electroplating and surface treatment: acts as a chromium mist suppressant during electroplating, improving deposit brightness, and can also be used for tarnish prevention on metal surfaces; 3. Coatings and polymers: functions as a UV absorber (absorption range 290–390 nm) for exterior coatings, plastics, and other materials, helping prevent photo-degradation and yellowing.

Usage and Recommended Dosage

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

Initial concentration (pre-filming treatment): For new systems or systems that have been cleaned but not pre-filmed, an initial dosage of 50–100 mg/L (as product) is recommended, with recirculation for 24–48 hours to establish a complete and dense protective film.

Maintenance concentration: During normal operation, a residual concentration of 2–10 mg/L (as active matter) is recommended. The optimal dosage should be determined based on specific water quality (pH, hardness, chloride content), temperature, and system metallurgy.

Compatibility: This product is compatible with most commonly used water treatment chemicals (e.g., scale inhibitors, dispersants, biocides/algicides). However, compatibility testing is recommended prior to formulating blended products.

⚠️ Safety and Storage

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

Storage: Keep sealed in a cool, well-ventilated, and dry area, away from direct sunlight.

Shelf life: 12 months.

Safety precautions: Wear appropriate personal protective equipment 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.

❓ Frequently Asked Questions (FAQ)

Q: What are the key improvements of this product compared to conventional BTA?
A: There are two key improvements. First, water solubility is significantly enhanced, eliminating the need for organic solvents or strong alkalis required to dissolve conventional BTA, and enabling direct dosing. Second, the protection scope is broadened—beyond copper and copper alloys, it also provides excellent corrosion inhibition for ferrous metals such as steel and galvanized steel, making it well suited to multi-metal systems.

Q: What is the recommended dosage in industrial recirculating cooling water systems?
A: For normal operation, a maintenance concentration of 2–10 mg/L (as active matter) is recommended. For new systems or cleaned but unpre-filmed systems, an initial dosage of 50–100 mg/L (as product) should be used, with circulation for 24–48 hours for pre-filming.

Q: Which chemicals is this product compatible with, and what should be considered when blending?
A: It is compatible with most commonly used scale inhibitors, dispersants, and biocides/algicides. Blending with copolymers such as organic phosphonates can further enhance overall corrosion and scale inhibition performance. Compatibility testing is recommended prior to blending to ensure no adverse reactions.

Q: Does this product offer any additional functions beyond corrosion inhibition?
A: Yes. It can function as a UV absorber (absorption range 290–390 nm) for exterior coatings and plastics, helping prevent photo-degradation and yellowing. It can also serve as a chromium mist suppressant during electroplating, improving deposit brightness.

📞 Contact Us and Documentation

For the Safety Data Sheet (SDS), detailed application recommendations, or business inquiries, please contact Tianjin Hi-Perferal Advanced Materials Co., Ltd.