Unique plating technologies realize pitless 450 µm thick coatings
Nittoh’s unique plating technologies realize ultra-thick film coatings of up to 450 µm. Using normal electroless plating techniques, pits form easily in the surface as thickness increases, so thick pitless coatings are said to be difficult to apply. However, Nittoh has solved this difficult problem with its own unique technologies. After much research, Nittoh developed its special technology; electroless 450 µm thick pitless plating.
| No. | Evaluation Criteria | Results |
|---|---|---|
| 1 | Chemical composition | Nickel (89 to 91%), Phosphorus (9 to 11%) |
| 2 | Hardness | HV 535 (non heat treated) HV 561 (200°C heat treated) HV 800 (300°C heat treated) HV 900 (400°C heat treated) |
| 3 | Adhesion | No peeling when machining plated parts |
| 4 | Thickness uniformity | Good throwing power, with accuracy of up to ±10% of required thickness |
| 5 | Wear resistance | Good |
| 6 | Specific gravity * | 7.9 (plated) 7.8 (recrystalline after heat treated at 400°C or higher) |
| 7 | Melt temperature | 896°C |
| 8 | Electrical resistance | 36µΩ (plated) |
| 9 | Coefficient of thermal expansion * | 13×10-6cm/cm/°C |
| 10 | Thermal conductivity * | 0.00105 to 0.0135 cal/cm/sec°C |
| １１ | Magnetism | Nil (plated), but becomes magnetic after heat treated at 300°C or higher |
| １２ | Structure | Completely non-crystalline when plated, but crystalline and showing segregation effect after heat treated at 300°C or higher |
* Data provided by plating solution manufacturer
Thick plating makes easy shape correction for molds
Electroless nickel plating can be applied in a uniform coating with nano-precision control of thickness. This technology is perfect for surface treatment of ultra-precision parts. Nittoh employs this technology when manufacturing its optical lens inserts (molds), and that enables the molding of high precision lenses. Plating of between 200 and 450 µm is possible, which makes easy shape correction, repairs and changes to molds. Talk to Nittoh about the plating technologies we can offer to you.
4529 Konami, Suwa City, Nagano Prefecture 392-0131 Japan