Electroless nickel plating is an auto-catalytic plating technique that is used to deposit a layer of nickel alloys on a solid piece of metal or plastic, where the metallurgical properties of alloys are often dependent on the phosphorus content or percentage.
Low Phosphorus Electroless Nickel Plating
Low phosphorus treatment is the type of plating that offers a very uniform thickness. It is very useful inside as well as outside complex configurations and this often eliminates grinding after electroplating and is an excellent choice for corrosion resistance.
Medium Phosphorus Electroless Nickel Plating
Medium phosphorus nickel plating is referred to the nickel alloys deposited on the metal or plastic by autocatalytic process in which the results is an alloy of medium phosphorus levels. There are different ranges of levels that fulfill various requirements. For decorative purposes, a 4-7% by weight, 6-9% for industrial purposes and 4-10% for electronic applications are ideal. Medium phosphorus electroless nickel plating gives results in almost a second. It is relatively a high speed deposit process and offers bright options for cosmetic applications. The plating procedure is very stable and thus is the most common type of electroless nickel plating among all.
High Phosphorus Electroless Nickel Plating
High Phosphorus electroless nickel plating offers high corrosion resistance. This makes it ideal for large nickel plating and meeting industry standards. Industries usually require large sheets of materials coated with nickel that gives considerable protection from highly corrosive and acidic substances. Factories and production units that involve coal mining and oil drilling require these specifications.
Applications And Uses
Most of the processes that entail electroless nickel plating produce a nickel phosphorus alloy. The phosphorus percentage in any electroless nickel coating typically ranges from 2% to 13%. Most widespread use of it is in engineering. Such coatings can withstand wear and tear, resistance, friction and corrosion from various sources and thus nickel phosphorus protection becomes the obvious choice.
Some applications also include paper handling equipment, rotors, oil field valves, drive shafts, optical surfaces for turning diamond, fuel rails, domestic applications such as door knobs, bathroom accessories, kitchen utensils, office tools and equipment and electrical and mechanical applications
Due to its high hardness, this coating can be used to prevent parts of machinery from rust or wearing out. Its gives uniform deposition that can be applied to complex components that are prone to easy wear and tear. It also has extensive uses in the manufacturing of hard disk drives, as a smooth coating can be applied to the aluminium disks. Due to its strength its use in the automotive industry has increased as it provides high resistance against wear and tear and corrosion and enhances the life of the vehicle.
Advantages of Electroless Nickel Plating or Large Nickel Plating include:
• No use of electrical power.
• Even coating on all surface.
• As desired plating volume and thickness.
• No complex filtration method required
• Different finishes can be obtained.
• Limited lifespan of chemicals.
• Treatment of waste is costly.