Electroless Nickel Plating Types and Terms
Types of Electroless Nickel Plating
- is a finishing treatment that can be either bright chrome or hard chrome.
-
use hard particulate matter mixed with electroless nickel plating chemicals.
Silicon carbides and synthetic diamonds are common types of composite
materials.
- creates a slick, low friction surface.
-
is an alternate type of the coating/plating process. Using a low voltage
current, charged nickel compounds are attracted to a substrate's
oppositely-charged surface; in this fashion, nickel deposits are transferred
through a solution and onto the substrate.
-
has the best corrosion resistance of any electroless nickel plating
process. It is used in harsh environments, such as oil drilling and
coal mining.
- yields very good resistance to alkaline corrosive environments.
It also provides uniform thickness, so that grinding after the procedure
is unnecessary.
- is a popular form of nickel plating
that has been used over the years. It generates a nice uniform coating
and will not build up on the edges of the substrate.
- improve a product's corrosion and wear resistance.
- is the process of depositing a metal or metal alloy onto a surface.
-
are admired for their as-plated hardness, which is greater than that
of nickel-phosphorus platings. The melting point for N-B alloys is higher
than that of N-P, but chemical costs for nickel-boron baths can be up
to 10 times that of the nickel-phosphorus chemicals.
- is the process of coating an item with a nickel alloy to prevent oxidation.
-
consist of nickel and boron or phosphorus. Other materials, such as
iron, cobalt and tungsten, are also included in poly alloys. Polly alloy
coatings allow maximum corrosion and high-temperature resistance, hardness
and magnetic or nonmagnetic qualities.
Electroless Nickel Plating Terms
-
The deformation or wearing away of a surface material due to frictional
forces and/or impact engendered by a nearby body or element.
- The loss of passivity
on the surface of a solid.
- The sticking together
or attractive force between two materials in contact. The adhesion that
electroless nickel provides to most metals is excellent.
- A solid compound consisting
of two or more metals fused together.
- A positively-charged
conductor that attracts nearby free electrons. Anodes are a uniformity
factor for the electroplating process, but not electroless plating.
- Metal that easily
oxidizes or dissolves, forming ions.
- A process that
is used to create an extremely bright surface on a metal.
- The quickened rate
of a chemical reaction due to a catalytic agent. Catalysts are often applied
to substrates to speed up the finishing procedure.
- The distance
from the top layer of the coating material to its substrate's outermost
surface. Common thicknesses for nickel deposits range from .0005 to .001
inches.
- A substance formed
by the chemical union of two or more elements.
- A metal's
capacity to transmit electric current.
- The deterioration
of a metal due to reaction with atmospheric elements. Nickel plating is
admired for its anti-corrosive qualities.
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- The removal of burrs and sharp edges on a metal by chemical, electrochemical
and mechanical processes.
- The ratio of a material's
mass to its volume. Nickel compounds used for coating purposes typically
have densities in the range of 7.7 gm/cm3 to 8.5 gm/cm3, depending on
the concentration of phosphorus.
- The ability of
a metal to withstand deformation before finally fracturing.
- The
ability of a material to resist the flow of electrical current.
- An alloyed
material that has a melting point lower than that of each individual element
alone.
- The resistance of
a material to deformations by indentation. For electroless nickel plating,
common hardness values range from 44 HRC to 59 HRC.
- The act of submerging
a product. Substrates are immersed into baths containing electroless nickel
plating chemicals.
- A charged atom or molecule.
- A reaction in which
electrons are removed from a reactant, usually because of the addition
of oxygen.
- A decrease in the
corrosion rate of metal, which results from the application of a protective
film such as electroless nickel plating.
- The material that
is being coated or plated.
- The maximum
amount of tensile force that can be applied to a material before it is
broken apart. Electroless nickel plating has comparable tensile strength
to many hardened steels.
- The surface features
of a material. Substrate topography affects coating appearances for many
metal products.