Electroless Nickel Plating
Electroless Nickel Plating is a metal surface plating technique in which nickel is deposited on the part by an autocatalytic chemical reduction method without the use of electric current. Instead of using an external electrical source, autocatalytic coatings use chemical reactions to deposit a nickel-phosphorus layer onto the part surface. In this way, electroless coatings, unlike current coatings, provide equal coating thickness even in the most complex shapes. In addition, since it is a type of coating that does not depend on electrical conductivity, it can be used even on non-conductive surfaces. Electroless nickel plating is a plating process that can be applied to surfaces of any geometry or complex shape and provides high precision. There are standards such as ASTM B733, Mil-C-26074E, AMS 2404 and AMS 2405 for electroless nickel coating.
Classification
Electroless nickel plating is a nickel-phosphorus deposition process that mostly contains 2 to 14% phosphorus for engineering purposes. According to phosphorus content;
Low Phosphorus; 2 – 5% P. Medium Phosphorus; 6 – 9% P. High Phosphorus; 10 – 14% P.
The higher the phosphorus content, the higher the corrosion resistance, but hardness is compromised with increasing phosphorus content.
Copyright © 2024 Bematek