Electroless nickel

Electroless nickel, also known as chemical nickel deposition, is a process for the deposition of nickel-phosphorus or nickel-boron alloys on metallic and non-metallic substrates. In contrast to galvanic processes, which require an electric current, the deposition in electroless nickel plating is carried out by a chemical redox reaction in an aqueous solvent. The nickel ions in the solution are reduced by a reducing agent, typically sodium hypophosphite, and deposited on the surface of the material to be coated.

This process offers several advantages, including a uniform coating even on complex shaped surfaces and in cavities. The deposited nickel alloy is characterized by high hardness, wear resistance and corrosion resistance. These properties make electroless nickel a preferred choice in the electronics, aerospace, automotive, chemical and petrochemical industries.

Electroless nickel plating can be performed over a wide temperature range and on various substrates, including metals such as steel, aluminum, copper and their alloys, as well as non-metallic materials such as glass and plastic. The thickness of the nickel coating can be precisely controlled and ranges from a few micrometers to several millimeters, depending on the specific requirements of the application.

Another important aspect of electroless nickel plating is the possibility of heat treatment after plating. Heat treatment can further increase the hardness and abrasion resistance of the nickel coating, which is particularly advantageous in applications that are exposed to high mechanical loads. Environmental and safety aspects are also important, as the chemicals used can be potentially hazardous and require appropriate protective measures. Overall, electroless nickel plating is a versatile and effective method for improving the surface properties of materials, with a wide range of applications and outstanding technical properties.