This test determines the mass per unit area (coating weight, g/m²) of a metallic coating on steel sheet and strip by X-ray fluorescence. The intensity of radiation emitted by the coating element is compared with a calibration built from reference samples of known coating weight. The method is non-destructive; the coating is not stripped.
Coating Types
- Hot-dip galvanized (zinc) coatings
- Aluminium-zinc and zinc-aluminium coatings
- Tin coatings (tinplate)
- Other metallic coatings (subject to suitable reference samples)
Determined Values
- Coating weight at the measuring points (g/m²)
- Single-side and both-side values, mean and minimum
- Conformity with the coating designation in the product standard
Applied Standard
- ASTM A754/A754M – Coating weight (mass) of metallic coatings on steel by X-ray fluorescence
Specimens
Flat specimens are taken from the sheet or strip; their number and locations (e.g. edges and centre) follow the product standard. Please state the coating type and declared coating designation in your request.