ISO 12944: C5
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C5 - Very High Corrosion Environment Anti-Corrosion Solution
For high-humidity and aggressive chemical atmosphere environments, such as coastal offshore platforms, chemical plants, and pulp mills
Applicable Standards
ISO 12944-2: C5-I / C5-M ISO 12944-5: 极高腐蚀防护体系
## Corrosion Environment Definition
**ISO 12944-2 C5 Grade** — Very high corrosion environment. High-humidity and aggressive chemical atmosphere environments.
Typical environments: Coastal offshore platforms, chemical plants, pulp mills, high-humidity production areas.
## Recommended Anti-Corrosion System
| Coat | Product | Coats | DFT (μm) |
|------|---------|-------|----------|
| Primer | Epoxy Zinc-Rich Primer (80%) | 1 | 70-80 |
| Intermediate | High-Build Epoxy MIO Intermediate Coat | 2 | 120-160 |
| Topcoat | Fluorocarbon Topcoat / Polyurethane Topcoat | 2 | 80-100 |
| **Total** | | | **270-340** |
## Surface Preparation
- Blast cleaning Sa2½
- Surface roughness Rz 50-85 μm
- Cleanliness: Free of oil, dust, and contaminants
## Design Life
Design service life: Very High (15-25 years).
## Application Scenarios
- Coastal offshore platforms
- Chemical plant structures
- Pulp mill equipment
- High-humidity industrial facilities
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