The DIN 50961 standard specifies requirements for coatings made of zinc (Zn) and iron (Fe) for corrosion protection of steel components. The designation "Fe Zn 8b" refers to a specific type of coating that consists of a zinc-iron alloy with an iron content of 8% (by weight).
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So, describes a steel part that has been electroplated with a minimum 8 µm layer of zinc, followed by yellow chromate passivation.
The chemical symbol stands for Ferrum (Iron). This dictates that the underlying substrate being treated must be an iron-based metal, typically carbon steel, low-alloy steel, or cast iron. 3. Zn (The Coating Element) din 50961 fe zn 8b
The parts are dried at controlled temperatures. If the steel has a high tensile strength (usually above 1000 MPa), it must undergo a hydrogen embrittlement relief baking process right after plating but before passivation. Modern Equivalents and Substitutions
: The German industrial standard (Deutsches Institut für Normung) for electroplated zinc coatings on iron or steel. Fe : Indicates the base material is iron or steel.
). In this case, the zinc layer must be at least 8 microns thick at any measurable point on the significant surface. The DIN 50961 standard specifies requirements for coatings
For the specification, the "B" indicates a blue chromating post-treatment. This treatment provides a bright, aesthetically pleasing finish and offers moderate corrosion protection, typically providing 48 to 72 hours of resistance to white rust in salt spray testing, depending on the quality of the passivation layer.
DIN (Deutsches Institut für Normung) 50961 is the German industrial standard that governs the requirements for electroplated zinc coatings on ferrous materials. It ensures that regardless of who manufactures a part, the coating will meet consistent quality levels regarding corrosion protection, adhesion, and appearance. 2. The Base Material: Fe stands for
If you are updating older blueprints, the nearest modern equivalents include: The chemical symbol stands for Ferrum (Iron)
While DIN 50961 has been a cornerstone of German and European surface engineering for decades, the standard landscape is gradually shifting toward international harmonization, specifically toward . The last version of DIN 50961 was published in 2012 , and the standard is now considered withdrawn (zurückgezogen) .
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