Thiourea Acid Corrosion Inhibitor
CAS Number: 62-56-6
Thiourea is an effective corrosion inhibitor used in acidizing operations and acid cleaning of oilfield equipment, protecting steel tubulars from attack by hydrochloric and hydrofluoric acid systems. It adsorbs onto metal surfaces through its sulfur and nitrogen atoms, suppressing both anodic and cathodic corrosion reactions. Thiourea is typically used in combination with other inhibitors and intensifiers for synergistic protection.
Technical Specifications
| ash (%) | ≤0.05 |
| appearance | White crystalline powder |
| purity (%) | ≥99.0 |
| moisture (%) | ≤0.5 |
| melting point (°C) | 176–178 |
Applications
- Matrix acidizing corrosion protection
- HCl acid pickling of oilfield tubulars
- HF mud acid treatment inhibition
- Scale dissolution acid treatments
- Acid stimulation well services
Key Features
- Dual-site adsorption via S and N atoms for broad metal protection
- Effective in HCl and HF acid systems
- Cost-effective component in acid corrosion inhibitor blends
- Enhances the performance of imidazoline and quaternary amine inhibitors
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