Din 50961 Fe Zn 8b ((link)) Jun 2026
Thus, specifies: A steel part electroplated with 8 micrometers of zinc, followed by blue/clear chromate passivation.
Modern standards (ISO) emphasize Hexavalent-free (Cr(VI)-free) passivations, which are required by ROHS regulations. Application and Process Flow The application of Fe//Zn 8b involves several steps: Degreasing/Cleaning: Removing oils and contaminants. Pickling: Removing rust and scale from the steel.
The steel part undergoes degreasing, acid pickling (to remove scale and rust), and thorough rinsing.
For engineers reading this, the most critical piece of information is that . Its technical content has been largely integrated into DIN EN ISO 4042: Fasteners - Electroplated coating systems . din 50961 fe zn 8b
Disclaimer: DIN 50961 has been officially replaced. It is recommended to use modern DIN EN ISO 2081 standards for new designs. DIN 50961 Electroplated ZN Coating | PDF - Scribd www.scribd.com Electroplated coatings of zinc / zinc-alloy
| Chromate Type | Appearance | Primary Characteristics | | :--- | :--- | :--- | | | Bluish, slightly iridescent | Typically contains hexavalent chromium (Cr⁶⁺) for moderate corrosion protection and a bright finish. Forms a thinner film than other types. | | C (Yellow) | Golden yellow, iridescent | Provides a thicker, heavier layer with significantly higher corrosion resistance than blue. | | D (Olive/Green) | Olive green | Very thick layer with maximum corrosion resistance. Often specified for the most severe environmental conditions. | | F (Black) | Matte to glossy black | Aesthetic black finish used for specialized applications such as automotive trim or firearms. |
: Represents the substrate or base material, which is iron or steel ( Ferrum ). Thus, specifies: A steel part electroplated with 8
: Fe/Zn 8/A (where 'A' denotes the clear/blue finish). ASTM equivalent : Often compared to ASTM B633 Type III . ✅ Summary of Specs The part is steel with an electro-zinc layer and a bright/blue chromate finish . If you'd like, I can help you with: Finding local plating shops that handle this specification.
DIN 50961 has close relationships with other national and international standards:
: The German technical standard (Deutsches Institut für Normung) governing electroplated zinc coatings on iron or steel. Note that this has largely been superseded by ISO 2081 in modern manufacturing. Fe : Represents the base material, which is iron or steel . Pickling: Removing rust and scale from the steel
Understanding DIN 50961 Fe/Zn 8/B: The Standard for Zinc Electroplating
The closest direct modern equivalent is . The cross-reference for specifications maps out as follows: Legacy Code: DIN 50961 Fe/Zn 8/B
: The German standard for electroplated zinc coatings. Fe : The base material (Iron or Steel). Zn : The coating material (Zinc). 8 : The minimum local thickness of the zinc layer (typically
For context, DIN 50961 includes several other passivation codes, each offering a different balance of corrosion protection and appearance.
In the world of mechanical engineering and corrosion protection, surface codes are the silent guardians of longevity. One of the most frequently specified, yet often misunderstood, codes on European technical drawings is .