refers to the type of "passivation" or chromate conversion coating applied over the zinc. In the DIN 50961 system: is clear/blue (transparent). iridescent/yellow is olive green.
| Designation Part | Meaning | | :--- | :--- | | | German Standard for Zinc Electroplating | | Fe | Base Metal: Steel/Iron | | Zn | Coating: Zinc | | 8 | Thickness: min. 8 µm | | b | Finish: Blue/Clear Chromate (Trivalent) | din 50961 fe zn 8b
The specification refers to a standardized electroplated zinc coating on iron or steel parts. This specific code defines the base material, the coating metal, the minimum thickness, and the subsequent chemical treatment (chromating/passivation). Breakdown of the Specification refers to the type of "passivation" or chromate