Valli tee 17, Vaela küla, Kiili vald 75413 Harjumaa Estonia
Valli tee 17, Vaela küla, Kiili vald 75413 Harjumaa Estonia
The choice of material and surface coating depends on the specific project, joint, and environment (it is important to consider whether the product will be used in an environment fully exposed to the weather, covered from direct precipitation, or in a closed and dry environment).
By evaluating the usage requirements (the required corrosion resistance) and the environment in which the product will be used, a decision can be made on which corrosion resistance and surface coating would be the most reasonable to use.
Most ACF sheet metal products are made from DX51D steel material with a Z275 zinc coating (275 g/m²).
There is also a selection of products with an added paint layer, galvanized after production, or made from stainless steel. These products have even greater corrosion resistance.
| Class | Reduction in zinc coating mass g/m² | Zinc thickness loss in microns per year | Description of environmental conditions |
|---|---|---|---|
| C1 | less than 0,7 | less than 0,1 | Buildings with clean air heating. Offices, schools, shops, etc. |
| C2 | 0,7...5 | 0,1…0,7 | Low air pollution areas. Cold buildings, sports halls, and places where condensation may occur. |
| C3 | 5...15 | 0,7…2,1 | Moderate air pollution urban areas, low salinity coastal areas, manufacturing facilities, laundries, etc. |
| C4 | 15...30 | 2,1…4,2 | High air pollution coastal areas, industrial zones. Chemical plants, swimming pools. |
| C5-I | 30...60 | 4,2…8,4 | Coastal and industrial areas with very high humidity and aggressive environments. Buildings with constant water vapor and condensation. |
| C5-M | 30...60 | 4,2…8,4 | Environments with very high salinity, aggressive industrial areas. |
The amount of zinc coating in g/m² indicates the total amount of zinc on both sides of a 1 m² surface.
*) C3 is the most common environmental condition in Estonia.
| Zinc coating mass g/m² | Average thickness of zinc coating in microns (µm) | Lifespan; years |
|---|---|---|
| 100 | 7 | 3..10 |
| 140 | 10 | 5..14 |
| 200 | 15 | 7..21 |
| 225 | 16 | 8..22 |
| 275 | 20 | 9..28 |
| 350 | 25 | 12..36 |