Application rate of epoxy zinc-rich primer per square meter

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Parameters needed to calculate the amount of epoxy zinc-rich primer required per square meter: Specific gravity: 2.4 kg/L; Volume solid content: 66% (Note: this refers to volume solid content, not mass solid content or zinc content, etc.); Dry film thickness: 50 μm (when applied by airless spraying). Calculation method: The area that can be coated with one kilogram or one liter of epoxy zinc-rich primer； (1000 * volume solid content) / (specific gravity * dry film thickness). For example: Epoxy zinc-rich primer: (1000 * 66%) / (2.4 kg/L * 50 μm) = 5.5 m²/kg. The values obtained through this calculation are based on theoretical amounts; the actual usage may differ (since the actual consumption during application cannot be calculated by our company).

Usage of epoxy zinc-rich primer for new steel surfaces:
Project | Airless spraying | Air spraying | Brushing | Weight per m²/kg | Coverage rate per m²/kg
--- | --- | --- | --- | --- | ---
Large areas | 0.25 | 3.92 | 0.27 | 3.66 | 0.24 | 4.06
Small areas | 0.30 | 3.33 | 0.29 | 3.43 | 0.22 | 4.40
Frames | 0.33 | 2.96 | 0.36 | 2.74 | 0.23 | 4.21

Usage of epoxy zinc-rich primer for secondary rust removal:
Project | Airless spraying | Air spraying | Brushing | Weight per m²/kg | Coverage rate per m²/kg
--- | --- | --- | --- | --- | ---
Large areas | 0.27 | 3.66 | 0.29 | 3.43 | 0.26 | 3.78
Small areas | 0.30 | 3.33 | 0.30 | 3.33 | 0.23 | 4.21
Frames | 0.33 | 2.96 | 0.36 | 2.74 | 0.23 | 4.21

Under conditions of a dry film thickness of 50 μm, each kilogram of epoxy zinc-rich primer can be used to coat approximately 4 m² of surface area. (The calculation for the above paint amounts is based on skilled workers following the application procedures provided by the epoxy zinc-rich primer manufacturers, while striving to minimize paint waste; therefore, the actual amount used may vary slightly.