Everything You Need to Know About Electroless Nickel Plating

What is electroless nickel plating of metal substrate? How does electroless nickel plating process work? How is it better than electroplating? These are most common questions asked by the manufacturers. Let’s find the answer to these frequently asked queries.

Electroless Nickel Plating

Electroless nickel plating is the process of depositing the layer of nickel on the metal substrate by chemical reaction. As the name suggests, electricity is not used in the plating process ( www.sun-glo/electroless-nickel ). A protective layer of nickel is applied to the metal substrate via a chemical reaction.

Electroless nickel plating is used for the metal finishing of industrial machinery metal parts, tools, equipment, household metal items, and various industrial metal parts.

How does electroless nickel plating process work?

In this process, the nickel coating is plated on the metal substrate without using electricity. It is a four-step process.

1. First of all, the metal substrate underwent a pretreatment process and cleaned thoroughly. It is necessary because any sort of contaminants, soil, dirt, and foreign particles will prevent the nickel plating from adhering to the surface of the metal substrate. The metal substrate is cleaned with serious of chemicals to remove grease, oil, and dirt from the surface.

2. After the thorough cleaning, the metal substrate is activated using an acid solution. The metal part is submerged into the acid solution to remove the scale and rust on the surface of the metal.

3. Once your metal substrate is ready for the electroless nickel plating, it is submerged into the bath containing nickel ions and various other chemicals. The metal substrate reacts with the electrolytic solution, and a uniform layer of nickel gets deposited on the metal substrate. The dipping time, temperature of the bath and special chemicals used in bath depend on the type of metal.

4. The last step is rinsing the metal part with water to remove any surface contaminants and drying the metal substrate.

Advantages of Electroless Nickel Plating

Electroless nickel plating offers a wide range of benefits. Here are the few of them:

• It forms a coating of uniform thickness over the entire surface of the substrate which is difficult to achieve with electroplating. This improves the corrosion resistance of the entire workpiece and makes nickel coating more durable.

• It is less porous coating than the electroplated nickel hence provides better protection to metal substrate against wear, abrasion, and corrosion.

• Complex workpieces can be coated evenly and consistently with electroless nickel plating which is difficult to coat with electroplated coatings ( https://www.sun-glo.com/blog/ ). It can coat almost anything no matter how complex is the shape of the metal substrate.

• Due to non-porous nature, electroless nickel plating is highly resistant to water, and provide great protection against moisture.

• As no electricity is required in the electroless nickel plating, it is more accurate and cost-effective than electroplating.

This was the complete guide on electroless nickel plating.