Corrosion Inhibitor
We are a manufacturer based in China. We specialize in providing high-quality Corrosion Inhibitor for industrial clients across various sectors. Whether you need chemicals consultation or technical support, our team is here to help.
Category：Chemical Additives Own Brand：MT /MOQ:100KG /From China/ B2B only.
Introduction
Corrosion Inhibitors
1. Definition & Mechanism
Corrosion inhibitors are chemical compounds that minimize or prevent metal degradation in corrosive environments by:
- Forming a protective film (adsorptive or passivating layer) on metal surfaces
- Blocking electrochemical reactions (anodic/cathodic inhibition)
- Scavenging corrosive agents (e.g., oxygen, H₂S)
2. Key Applications by Industry
| Industry | Protected Components | Common Inhibitor Types |
|---|---|---|
| Oil & Gas | Pipelines, storage tanks | Imidazolines, phosphate esters |
| Automotive | Cooling systems, fuel tanks | Nitrites, silicates |
| Aerospace | Aircraft alloys | Chromates (restricted), organic azoles |
| Marine | Ship hulls, offshore platforms | Volatile amines (VCI), molybdates |
| Water Treatment | Boilers, heat exchangers | Polyphosphates, filming amines |
3. Classification by Function
| Type | Mechanism | Example Compounds |
|---|---|---|
| Anodic | Blocks oxidation (metal dissolution) | Sodium chromate, nitrites |
| Cathodic | Prevents reduction (H⁺/O₂ consumption) | Zinc salts, polyphosphates |
| Mixed | Dual-action protection | Benzotriazole (for copper) |
| Volatile (VCI) | Vapor-phase protection | Cyclohexylamine nitrite |
4. Technical Specifications
| Property | Typical Value/Requirement |
|---|---|
| Dosage | 50–500 ppm (varies by system) |
| pH Range | 6–10 (depends on inhibitor type) |
| Temperature Stability | Up to 150°C (for oilfield chemicals) |
| Efficiency | >90% corrosion reduction |
5. Environmental & Safety Considerations
- Regulatory Compliance:
- Restricted: Chromates (RoHS/REACH-regulated)
- Eco-Friendly: Bio-based inhibitors (e.g., plant extracts)
- Handling:
- Use PPE (gloves, goggles) for concentrated formulations
- Biodegradability: OECD 301B testing for water-soluble types
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