Benzotriazole Metal Deactivator (BTA)
CAS Number: 95-14-7
Benzotriazole (BTA) is the most widely used metal deactivator and corrosion inhibitor for copper and copper alloy surfaces, forming a highly stable, insoluble polymeric Cu-BTA chelate film that prevents oxidation, tarnishing, and corrosive attack. BTA is effective at very low concentrations (10-100 ppm) and is used in coolants, lubricants, metal working fluids, surface treatment baths, and as a direct surface treatment agent. It also provides corrosion inhibition for silver, zinc, and other metals in multimetal systems.
Technical Specifications
| pH | 5.0-7.0 (aqueous solution) |
| appearance | White to off-white crystalline powder |
| purity (%) | ≥99 |
| active content (%) | ≥99 |
| melting point (°C) | 98-100 |
Applications
- Copper and brass surface tarnish prevention treatment
- Engine coolant copper and brass radiator corrosion inhibition
- Metalworking fluid copper corrosion inhibitor package
- PCB and electronics copper surface protection
- Water treatment copper pipe and heat exchanger inhibition
Key Features
- Industry-standard copper and brass corrosion inhibitor at ppm levels
- Effective across wide pH range (4-10) in aqueous systems
- Also protects silver, zinc, and tin in multimetal systems
- Compatible with most lubricant, coolant, and metalworking fluid formulations