ISO 12944: C3
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C3 - Medium Corrosion Environment Anti-Corrosion Solution
For urban and industrial atmospheres with moderate humidity and pollution, such as chemical plants and high-humidity production areas
Applicable Standards
ISO 12944-2: C3 ISO 12944-5: 中腐蚀防护体系
## Corrosion Environment Definition
**ISO 12944-2 C3 Grade** — Medium corrosion environment. Urban and industrial atmospheres with moderate humidity and mild pollution.
Typical environments: Chemical plants, high-humidity production areas, food processing plants, urban steel structure buildings.
## Recommended Anti-Corrosion System
| Coat | Product | Coats | DFT (μm) |
|------|---------|-------|----------|
| Primer | Epoxy Zinc-Rich Primer (30%) | 1 | 50-60 |
| Intermediate | Epoxy MIO Intermediate Coat H1100C | 1 | 60-80 |
| Topcoat | Acrylic Polyurethane Topcoat | 2 | 60-80 |
| **Total** | | | **170-220** |
## Surface Preparation
- Blast cleaning Sa2½
- Surface roughness Rz 40-70 μm
## Design Life
Design service life: Medium to High (5-15 years).
## Application Scenarios
- Chemical plant equipment
- High-humidity production workshops
- Urban building steel structures
- Food processing equipment
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