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The part is immersed in the chromium-containing chemical solution to form the protective yellow conversion layer. din 50961 fe zn 8b
The code describes a specific surface treatment for steel or iron parts. It indicates a zinc-plated coating designed primarily for mild indoor use or light decorative purposes. Breakdown of the Code This public link is valid for 7 days
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While Germany has adopted many ISO standards, DIN 50961 remains in active revision and is still invoked in legacy drawings, OEM specifications (e.g., Volkswagen, BMW, Mercedes), and tooling documents. Many engineers understand "Fe Zn 8b" faster than "ISO 2081 Fe/Zn 8b."
The "8" in Fe//Zn 8B means the coating must be at least 8 μ m thick, typically measured at significant surfaces. This thickness provides a robust, sacrificial barrier against oxidation. Passivation (Chromate Conversion Coating - 'B')