Pyrolytic chromium carbide coating
Pyrolytic chromium carbide coating (PCC) is a technology for protection and reworking of rapidly wearing parts of manufacturing equipment working in extreme environmental conditions, using vacuum deposition technology. Coating mechanical parts can help with problems of corrosion, adhering, high-temperature and mechanical wear thus reducing unplanned repairs and loss of production.
Source: Wikipedia — Pyrolytic chromium carbide coating (CC BY-SA 4.0)