Multi-layered hard chromium (MHC) - Increases corrosion resistance
The special feature of the multi-layered hard chromium plating process lies in the multi-layered construction of the hard chrome coating. The defined intermediate processing ensures that the crystalline structure of the MHC coating is interrupted, resulting in the formation of layers. In this way, continuous macro-cracks from the surface to the base material of the part are excluded.
The particular advantage of the double or triple hard chromium plating is its very high corrosion resistance. Multi-layered hard chromium coatings are utilised in printing cylinders, vehicle hydraulics, hydraulic systems in mining and machine construction. Parts that are constantly exposed to liquids, such as chemicals, plastics and salt water, retain their characteristics and functionality with the multi-layered hard chromium coating for over 480 hours in accordance with DIN EN ISO 9227 - NSS (formerly DIN 50021 - ESS).
- Minimum coating thickness: 60 µm
- Corrosion resistance of the basic material in accordance with DIN EN ISO 9227 - NSS
(formerly DIN 50021 - ESS): 480 hours
- Wear resistance of the plating (Taber abrasion values with CS 10 rollers; 9.81 N loading after
1,000 revolutions: 1.2 mg
- Hardness HV 0.1: 1,000 ± 50