Galvanic electroplated chromium coatings exhibit high hardness and abrasion resistance, but are brittle. They are used in the automotive and precision industries (measuring instruments, probes).
Decorative chrome plating at KNK zamac in Ľubietová is performed by applying a thin layer of hexavalent chromium to a copper and nickel sublayer and not directly to steel.
Electroplated chrome is characterized by high hardness, which is usually around 50 HRC.
Nickel plating typically has a shiny, silvery appearance. Black nickel plating, on the other hand, has a dark, black finish. Sometimes, the black nickel finish retains a reflective, mirror-like quality. This premium look is especially suitable for televisions, kettles, toasters, light switch bezels, fixtures, and furniture hardware. The only difference is in their aesthetic appeal.
Electroplated nickel plating typically has a hardness of around 30 HRC. This level of hardness is suitable for wear resistance. For this reason, nickel electroplating is used in various industries. You can find its use in the automotive, electronics and decorative furniture industries.
Yes, black nickel plating is highly electrically conductive. It typically provides a highly conductive surface and is uniformly plated on complex shapes. For this reason, black nickel plating is used in many electronic applications as it reduces light reflection and absorbs it to a greater extent.
Black nickel plating is highly resistant to corrosion. It is even more durable than other types of finishes. Its protective coating maintains a shiny appearance for a longer period of time. Unlike other finishes, black nickel finishes are less prone to showing fingerprints. In addition, it is easy to maintain.
There are several limitations to electroplating nickel. One of the main reasons is that the process is only designed for conductive materials. In addition, the cost of black nickel is higher than traditional nickel plating.
Zinc is a softer metal used in corrosion-resistant coatings and in the event of damage forms zinc oxide, which protects the damaged area, unlike nickel, whose coating, if damaged, quickly rusts on the damaged area, but nickel is a harder metal with good wear resistance, used mainly in decorative applications with less emphasis on corrosion resistance and is ideal for moving contacts, battery terminals, as it is an excellent conductor of electrical current on terminals or connectors.
It can, as long as there are no strong and sharp impacts that could damage the nickel layer.
Nickel plating provides increased heat resistance and protects components from high-temperature environments and can reduce friction and heat generation, reducing wear in moving parts.
From a product perspective, it certainly does, as it extends the lifespan of components. It also allows designers to use fewer and cheaper materials to manufacture components.
As long as a metal can conduct electricity, it can be plated. However, some metals, such as aluminum, will need a conductive layer applied first. At our KNK zamac plant in Ľubietová, we focus on electroplating zinc alloy and do not do aluminum.
Electroplating tends to be thinner in holes, recesses, and hard-to-reach shaded cavities than on easily accessible exterior surfaces unless special clamping and rotation techniques are used relative to the anodes.
Electroplating itself only takes a few hours, but the most important part of plating is the pre-preparation of the input material as well as the selection of the correct mounting/suspension, which often takes more time than the galvanizing process itself in the line.
