Electroless plating
Electroless plating is a process that, without the application of an external electric current, utilizes redox reactions to deposit alloy coatings onto substrates with catalytic surfaces. Electroless nickel plating is an emerging technology that has found widespread application in electroless plating.
The characteristics of electroless nickel plating are as follows:
1. High surface hardness and excellent wear resistance
Its surface hardness can be selected within the range of HV = 550–1100 kg/mm².
2. The hardened layer exhibits uniform thickness and consistent hardness, with no deformation of the treated components regardless of their shape.
It is particularly well suited for surface strengthening treatments of complex-shaped, deep blind holes, and small components requiring high precision.
3. Exhibits excellent corrosion resistance:
It exhibits excellent corrosion resistance in a wide range of acids, bases, salts, ammonia, and seawater, surpassing that of 304 stainless steel.
4. The coating exhibits high surface gloss and excellent decorative appeal.
5. The coating exhibits excellent electrical conductivity and solderability, making it an outstanding material for electrical contact.
6. The coating exhibits high adhesion to the substrate and is resistant to peeling; its bonding strength surpasses that of electroplated hard chromium and ion-plated coatings.
7. A wide range of substrate materials can be processed, including alloy steel, stainless steel, copper, aluminum, zinc, titanium, plastics, nylon, glass, and more.
Electroless nickel plating is primarily used in applications that require the following properties:
1) Wear resistance 2) Corrosion and heat resistance
3) Glossiness, release properties 4) Lubricity
5) Weldability 6) Electromagnetic and electrical conductivity
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