Mercaptobenzothiazole (MBT) Copper Corrosion Inhibitor
CAS Number: 149-30-4
Mercaptobenzothiazole (MBT) is a highly effective copper and copper alloy corrosion inhibitor used in oilfield cooling water systems, heat exchangers, and process equipment protection. It forms a stable chelate complex with copper ions on metal surfaces, providing excellent protection against copper corrosion from dissolved oxygen, CO₂, and chloride ions at dosages of 1–10 ppm. MBT also exhibits moderate inhibition of iron and zinc in water treatment systems.
Technical Specifications
| ash (%) | ≤0.05 |
| appearance | Yellow to light yellow powder |
| purity (%) | ≥98.0 |
| moisture (%) | ≤0.5 |
| melting point (°C) | 174–178 |
Applications
- Cooling water copper tube corrosion inhibition
- Heat exchanger copper alloy protection
- Oilfield process equipment copper fitting protection
- Combined multi-metal corrosion inhibitor formulations
- Circulating water treatment systems
Key Features
- Excellent copper and copper alloy corrosion inhibition
- Stable chelate film formation on metal surfaces
- Effective at low dosage (1–10 ppm) in circulating water
- Compatible with scale inhibitors and biocides in multi-component treatments
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