General Information
Electroless Nickel Plating (ENP) is one of the coating technologies that has gained significant popularity across many industrial sectors.
In industrial applications, resistance to corrosion and wear are key requirements for machine parts and tools.
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Specification based on:
ASTM B733-22
Coating type:
Electroless (autocatalytic) nickel plating Ni-P (6–9% P)
Attention to detail
Specifications of Offered Coatings
Parameters of ENP coatings according to the classification defined in ASTM B733
Coating type by phosphorus content:
Type I: No requirements (Ni)
Type IV: 5-9% (Standard engineering applications)
Service conditions by thickness:
SC0: 0.1 µm (Diffusion barriers, underlayers)
SC1: 5 µm (Light corrosion protection)
SC2: 13 µm (Moderate industrial environments)
Heat treatment class (Table 3, ASTM B733-22):
Class 1: None (No heat treatment)
Class 2: 260-400°C (Maximum hardness)
Class 3: 180-200°C (Stress relief, adhesion on steel)
Class 4: 120-130°C (Adhesion on carburized steel, aged aluminum)
Class 5: 140-150°C (Adhesion on aluminum and copper alloys)
Class 6: 300-320°C (Adhesion on titanium)
Additional Services
- Stress relieving before coating
- Stress relieving after coating (reducing hydrogen embrittlement)
- Peening (shot peening/glass bead blasting) before coating
- Protective atmosphere during heat treatment above 260°C: Nitrogen / Argon
- Coating thickness testing
- Hardness testing
