EN-GJS-700-2 | 5.3300 Black chromate coating
| Numeric designation | 5.3300 | 
|---|---|
| Chemical designation | EN-GJS-700-2 | 
| State | Black chromate coating | 
| Etching | 3 % Nital | 
Chromium coatings on metals are formed by treatment with chromic acid and are applied as corrosion protection. The color depends on the thickness (here approx. 1 µm).












