dianoir® G4, deposited with a temperature below 190ºC is perfect for coating complex shapes; thanks to the combination of two technologies, the Argor-Aljba technicians, have obtained a very compact coating with a remarkable resistance to the abrasion. dianoir® G4 is resistant to acid and alkaline chemicals and solvents and is hypoallergenic.

dianoir® G4

VDI abbreviation multilayer a-C:H
Process PACVD + HiPIMS
Structure Amorphous
Content in sp3 [%] 40-60
Color Intense black
Thickness 2-3 µm
Max. operating temperature [°C] 400
Hardness [GPa] 19-24
Friction coefficient 0.12

All provided data are approximate values, depend on the application, environment and test conditions. Coating hardness HIT [GPa] measured by nano indentation according to ISO 14577. Hardness can be adapted to the application. Friction coefficient (dry) compared to the steel determined by ball-on-disc dry test with a steel sphere according to ASTM G99. During the running-in the indicated values may be exceeded. Maximum service temperature [° C] These are approximate values.


dianoir®G4, specially indicated for watch and fashion components, has the following advantages:
excellent adhesion on brass, stainless steel and titanium alloys components
- extremely compact coating layer and homogeneous black color
decorative and functional coating with remarkable resistance against abrasion and scratches
- non-toxic process and biological compatibility are optimal properties for the use of dianoir®G4 in contact with the human skin
- ideal for all watches and fashion components that will benefit from an improvement in their tribological and decorative properties