Electrodeposited zinc coating, 8 µm minimum local thickness on all functional surfaces, followed by trivalent blue/clear chromate passivation. No white rust before 8 hours NSS per ISO 9227. Hydrogen embrittlement relief: Bake at 200°C for 8 hours within 4 hours of plating for steel >1000 MPa.
While ISO 2081 provides the baseline, DIN 50961 adds critical, specific details for German and European industry. Its primary role is to under defined service conditions and recommending appropriate coating thicknesses. It explicitly defines test methods and evaluation criteria for: 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 Electrodeposited zinc coating, 8 µm minimum local thickness