Most plating requires electricity, but electroless nickel plating (ELp-Fe / Ni) utilizes a chemical reaction on the surface of the product to perform plating. It is suitable for surface treatment of precision parts because there is little variation in film thickness and it is possible to control the film thickness in micrometer units. It is a plating that has a high film hardness and can be increased to about Hv1000 via heat treatment.
It also offers the best adhesion to aluminum materials and is used as a base for various types of plating.
Basic characteristics
| Wear resistance | Heat resistance | Corrosion resistance | Chemical resistance | Decorativeness | Lubricity | Adhesion | Electrical conductivity | Dimensional accuracy |
| ◎ | ◎ | 〇 | 〇 | 〇 | △ | ◎ | △ | ◎ |
Features
Features 1High dimensional accuracy
Since electroless nickel plating (ELp-Fe / Ni) does not use a power supply, the plating thickness can be controlled without being affected by the physical characteristics of electricity. Since a chemical reaction is used, a uniform plating thickness can be maintained by controlling the temperature, pH, and time. It is suitable for parts that require dimensional accuracy.
Features 2Increased hardness via heat treatment
Electroless nickel plating (ELp-Fe / Ni) can harden the film through heat treatment called baking. It is said that 400℃ heat produces the highest degree of hardness, and the Vickers hardness is about Hv550 before heat treatment, but it can be hardened to about Hv700～1000 with heat treatment.
Since an oxide film is formed on the film surface by heat treatment, the surface color changes to yellow or purple depending on the thickness of the oxide film.
Non-magnetic film
Nickel is a magnetic material, but electroless nickel coatings can be non-magnetic.
Phosphorus is an essential component in electroless nickel solution. It is incorporated into the film, so the film becomes an alloy of nickel and phosphorus.
When the eutectoid rate of phosphorus exceeds 8%, the crystalline state changes to a state called amorphous and becomes non-magnetic.
Electroless nickel plating is used for parts that do not like magnetic fields.
Plating equipment
| Processing type | Maximum size | Maximum weight |
| Rack type A | 600×400×650H | 20kg |
| Automatic rack B | 700×700×200H | 20kg |
| Automatic rack C | 1200×400×900H | 100kg |
| Basket | 200×200×200H | 5kg |
| Automatic barrel | - | - |
Proceccable materials
Rack type A: Aluminum materials, casting materials, (aluminum materials only)
Automatic rack B: Aluminum, casting (aluminum only)
Automatic rack C: Iron materials, copper materials, stainless-steel materials, casting materials (iron materials only)
Basket: Iron materials, copper materials
Automatic barrel: (Copper materials)
Application
Machine housings, structural parts, sliding parts such as gears, valve parts, molds, electronic substrates, printer shafts, etc.
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