, though it remains a common reference in legacy engineering drawings. Google Groups Breakdown of the Designation : The substrate material is iron or steel. : The coating material is electrodeposited zinc.
When you order a part specified as DIN 50961 Fe/Zn 8b , you are getting a steel part with an 8µm electroplated zinc coating and a clear/blue passivation . It is the sweet spot for general mechanical engineering and automotive interiors where cost-effectiveness meets solid corrosion protection.
: 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.
m), followed by a bright (clear/blue) chromate conversion passivation . This standard designator is widely relied upon in the automotive, manufacturing, and fastener industries to ensure controlled galvanic corrosion protection and aesthetic consistency for steel components. din 50961 fe zn 8b
The surface treatment alphanumeric code can be systematically broken down into four distinct parameters:
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The European standard equivalent for clear/blue-bright electroplated zinc. , though it remains a common reference in
When sourcing, ensure that the supplier provides RoHS-compliant trivalent passivation to meet current environmental regulations, and always consider the 8 μ m thickness when designing threaded fasteners.
Zinc protects iron and steel through two distinct mechanisms: Barrier Protection
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 When you order a part specified as DIN
"b" offers minimal corrosion protection but provides:
The DIN 50961 Fe Zn 8b coating is commonly used in various industries, including:
: Denotes the passivation or chromate treatment type . In the DIN 50961 system, "b" (sometimes interchanged with "B") typically refers to blue or clear chromating , which provides a transparent, often slightly iridescent finish. Why Use DIN 50961 Fe Zn 8b?
Corrosion is the primary enemy of industrial steel components. To prevent premature failure, engineers rely on standardized surface treatments to provide predictable, sacrificial protection.