Corrosion protection coating

wear-resistantprotectiveabrasion-resistant

CrN coating Hansheng is a chromium nitride (CrN) PVD hard coating service designed to improve surface performance, wear resistance and corrosion protection of precision components. The service is delivered as an integrated solution including material selection, precision machining and surface preparation to ensure coating adhesion and repeatable results.

Overview

• Chromium nitride (CrN) deposited by PVD (arc evaporation or magnetron sputtering) to form a hard, smooth, chemically stable metallic-grey surface layer suitable for high-load and anti-galling applications.
• Provided with preparation steps (material selection, machining tolerances, polishing, ultrasonic cleaning and heat treatment) to optimize adhesion and part performance.

Key advantages

• Low friction and anti-adhesion: reduces cold welding and material buildup on tooling.
• Corrosion resistance: dense barrier effective against oxidation and chemical attack, suitable for humid or corrosive environments.
• High toughness: less prone to brittle cracking versus some hard coatings; withstands impact and high contact stress.
• Thermal stability: oxidation resistance up to ~700°C, enabling elevated-temperature use.

Comparison

• Features:
  • CrN (Chromium Nitride): silver / metallic-grey; excellent corrosion resistance; recommended for molds, Cu/Al machining and high-load or sticky material applications.
  • TiN (Titanium Nitride): gold; general-purpose coating.
  • Uncoated steel: steel grey; lower corrosion resistance compared with coated options.

Applications

• Injection and die-casting molds — reduces sticking and protects cores and screws from corrosive plastic fumes.
• Cutting and forming tools — prevents built-up edge (BUE) when machining sticky metals (aluminum, copper), extends tool life and improves surface finish.
• Precision mechanical components — lowers friction and micro-motion wear for shafts, gears, camshafts, piston rings and pump parts.
• Hygiene-sensitive processes — chemically stable and biocompatible properties suitable for medical and food-contact applications (biocompatibility certifications depending on part and testing).

Technical specifications

• Coating material: Chromium Nitride (CrN)
• Deposition technology: Arc evaporation / magnetron sputtering (PVD)
• Appearance: silver / silver-grey metallic finish
• Coating thickness: 1 - 5 µm
• Micro-hardness: 1,750 - 2,100 HV
• Coefficient of friction: ~0.5 (vs. steel)
• Max service temperature: up to 700°C (1,292°F)
• Substrate compatibility: tool steels, stainless steels, carbide, brass, copper, select titanium and copper alloys