What is ENP process?
What is ENP process?
Electroless Nickel Plating (ENP) is the deposit of a nickel-alloy coating by chemical reduction – without the electric current that’s used in electroplating processes. ENP is deposited by reducing nickel ions to metallic nickel with a chemical reducing agent such as sodium hydrophosphite.
What is Ni P coating?
Ni-P chemical coatings have been used to prevent wear, corrosion and as an alternative for hard chromium, since the latter’s deposition processing is very harmful to the human health and the environment. The relation of chemical composition and microstructure with mechanical properties of Ni-P coatings is presented.
What is ENP material?
Electroless Nickel plating (ENP) is an autocatalytic process whereby a hard and corrosion resistant alloy of Nickel and phosphorous is deposited on a metallic surface. As the name suggests ENP is accomplished by a chemical reaction, without the aid of electric current.
What is the purpose of electroless nickel plating?
Electroless nickel plating are used to provide protection from wear and abrasion, resistance against corrosion, and add hardness to parts of all conditions. It’s commonly used in coatings applications in engineering, aerospace, oil and gas, construction, electronics and several others.
What is the need of electroless plating?
Electroless plating has been defined as a controlled autocatalytic deposition of a continuous layer on a catalytic surface by the reaction of a complex compound and a chemical reducing agent. This method allows the easy preparation of films using simple equipment and any type of support with low thickness.
How is electroless nickel applied?
The process involves dipping the substrate in a water solution containing nickel salt and a phosphorus-containing reducing agent, usually a hypophosphite salt. It is the most common version of electroless nickel plating (EN plating) and is often referred by that name.
How hard is nickel plating?
As plated, it has a hardness of between 68 and 72 on the Rockwell C Scale. Electroless nickel can also protect components from wear and tear that occurs over time, which helps parts to last longer and saves companies money on maintenance and replacement costs.
What is a nickel strike?
A nickel strike is a very thin coat of a nickel that will stick to stainless that has been properly cleaned and activated. Typically a Wood’s Strike is used.
What is ENP valve?
Electroless nickel plating is an alloy of nickel and phosphorous. Electroless Nickel Plating(ENP) Ball has been widely applied in valve ball production with its advantages such as simple processing, low-cost, uniform thickeness and large-area plating.
How do you use electroless nickel plating?
Electroless Nickel is applied by heating the nickel bath to 195°F, and then immersing the part to be plated into the bath for 15-60 minutes, depending on the desired thickness. No rectifiers or DC power are required – an autocatalytic reaction takes place that applies the nickel coating.
What is electelectroless nickel plating (ENP)?
Electroless Nickel Plating (ENP) is the deposit of a nickel-alloy coating by chemical reduction – without the electric current that’s used in electroplating processes. The majority of ENP for engineering purposes is a nickel phosphorus deposit containing 2 to 14% phosphorus.
What can be finished with ENP?
Examples of industrial parts that can be finished with ENP include drive shafts, electrical and mechanical tools, engineering equipment, oil field valves, valve pumps and more. The Electroless Nickel Plating process offers various advantages over traditional electroplating that make it a reliable surface finishing treatment:
What is ENP and how is it formed?
ENP is deposited by reducing nickel ions to metallic nickel with a chemical reducing agent such as sodium hydrophosphite. Thickness of 25-75m is common, high phosphorus ENP can edge above 75m although this does start to push the limits of ENP.
What is the effect of heat treatment on ENP?
Heat treatment causes particles of nickel phosphide to precipitate, destroying the amorphous character of the deposit. With high phos ENP deposits this occurs at temperatures between 330 and 360C. How well does ENP adhere to substrates?
