1 Aperçu de la méthode
The wheel hub is thoroughly cleaned with ultrapure water and air-dried. A scraper is used to remove the topcoat, intermediate coating and primer on the surface. After microwave digestion, the concentration of chromium is determined by flame atomic absorption spectrometry at a wavelength of 357.9 nm.
2. Champ d'application
Determination of chromium in surface coatings of wheel hubs
3 Norme de référence
IEC 62312
4 Instruments and Reagents
4.1 Instruments et équipements
4.1.1 Analytical Instruments
表格
| - Non, non. | Nom | Quantité | Exigences techniques | Accessoires |
|---|---|---|---|---|
| 1 | Spectrophotomètre d'absorption atomique de flamme | 1 ensemble | — | Lampe à cathode creuse au chrome |
| 2 | Acetylene Gas Cylinder | 1 cylindre | Pureté ≥ 99,99% | — |
| 3 | Compresseur d'air | 1 unité | Pression nominale d'échappement: 0,3 MPa | — |