DIN 267 Part 9 defines how the corrosion resistance of the electroplated layer must be verified. This is usually evaluated using the in accordance with ISO 9227 (formerly DIN 50021). The standard categorizes performance based on: White Rust: Corrosion of the zinc coating itself.
The standard is a critical technical document established by the German Institute for Standardization ( DIN ). It defines the technical delivery conditions for mechanical fasteners with electroplated coatings , primarily focusing on bolts, screws, and nuts. Current Status & Replacement
"Fasteners to be zinc plated and passivated in accordance with DIN 267 Part 9 (A2A), with a minimum coating thickness of 5 μm and appropriate hydrogen embrittlement relief."
