glossary
CrN coating — Industry Glossary Entry
Definition of CrN PVD coating for industrial blades: a corrosion-resistant silver-grey coating, the standard for food-contact and wet applications.
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CrN coating Chromium Nitride (CrN) is a PVD ceramic coating, silver-grey, with the best corrosion resistance of the standard PVD coatings. Applied at 400–500 °C, 3–5 µm thick. CrN is chemically inert in most food acids, fuels, and mild chemicals, making it the standard for food-contact cutting and wet-end applications.
When to use
- Food-contact slitting (food packaging, packaging films)
- Wet-end converting (battery separator film, paper wet-end)
- Marine and outdoor cutting applications
- Copper and brass cutting (no chemical reaction)
- Anywhere corrosion resistance matters as much as wear
When NOT to use
- High-temperature cutting above 600 °C (oxidises)
- Very abrasive substrates without a harder topcoat (TiCN)
- Where the absolute lowest friction is needed (use DLC)
See also.
