Mercaptobenzimidazole Corrosion Inhibitor (MBI)
CAS Number: 583-39-1
Mercaptobenzimidazole (MBI) is a sulfur-containing heterocyclic corrosion inhibitor that provides broad-spectrum metal protection for copper, zinc, steel, and aluminum through strong chemisorption and chelate film formation on metal surfaces. MBI is particularly effective as a corrosion inhibitor in acidic and neutral media, and as a rubber-to-metal bonding intermediate in tire and hose manufacturing. It is also used as an accelerator retarder in rubber compounding, demonstrating the compound's versatility in industrial applications.
Technical Specifications
| pH | 4.0-6.0 (aqueous solution) |
| appearance | Off-white to pale yellow crystalline powder |
| purity (%) | ≥97 |
| active content (%) | ≥97 |
| melting point (°C) | 298-304 |
Applications
- Copper, zinc, and steel corrosion inhibition in acidic media
- Metalworking fluid and coolant corrosion inhibitor package
- Rubber-to-metal bonding promoter in tire manufacturing
- Electroless plating bath metal deactivator
- Lubricant and hydraulic fluid corrosion inhibitor
Key Features
- Broad-spectrum metal protection for copper, zinc, steel, and aluminum
- Effective in acidic environments where other inhibitors may be insufficient
- Strong chemisorption provides durable inhibition under flow conditions
- Synergistic performance when combined with BTA or TTA in multimetal systems