In the past and for the future several different types of coatings got established or are under development and evaluation:

• Au (Gold)
• Metal-nitrides (Titanium-nitride and others)
• DLC (diamond-like-carbon in various compositions)

Such coatings can be deposited by PVD (physical vapor deposition) – processes such as:

• Magnetron-Sputtering
• Arc-Evaporation
• PECVD (Plasma Enhanced Chemical Vapor Depositen)

Coating Samples

Metal-nitrides coated bipolar plates from an international bipolar plate manufacturer.

DLC coated bipolar plate from an international bipolar plate manufacturer.