EN 6786 is a new type of electroless nickel-phosphorus alloy plating process. This process exhibits excellent stability. It has a high phosphorus content ranging from 10 to 14 (wt.%), and the maximum deposition rate can reach 10-18 micrometers per hour. EN 6786 provides semi-bright to bright coatings with outstanding corrosion resistance that meets the standards required by MIL.SPEC.26074D and AMS.2404B.
I. Coating Characteristics
1. Magnetism: Non-magnetic
2. Phosphorus content (wt%): 10 - 14
3. Coating density (g/cm3): 7.1 - 7.9
4. Melting point (°C): 860 - 950
5. Electrical resistivity (μΩ•cm): 40 - 100
6. Hardness (HV): 500 - 600
7. Hardness after heat treatment (HV, 400°C for 1 hour): 900 - 1000
8. Neutral salt spray test (ASTM B117): Above 1000 hours at 35°C, 5% NaCl
9. Nitric acid test (68% concentrated nitric acid, room temperature): No color change after 1 minute or more.
II. Characteristics
1. Fast deposition rate: 10-18 μm/h
2. High phosphorus content, non-magnetic coating with excellent corrosion resistance and ductility.
3. Excellent stability and a lifespan of over 8 cycles.
4. Low coating porosity, no porosity up to 15 μm, strong corrosion resistance.
5. Wide range of bath loading: 0.2-2 dm²/L
