Choosing different coatings does not affectthe magnetic strength or performance of the magnet, except for our Plastic and Rubber Coated Magnets. The preferred coating is dictated by preference or intended application. More detailed specifications can be found onour Specs page.
Nickel is the most common choice for plating neodymium magnets. It is actually a triple plating of nickel-copper-nickel. It has a shiny silver finish and has good resistance to corrosion in many applications. It is not waterproof.
Black nickel has a shiny appearance in achar coal or gunmetal color. A black dyeis added to the final nickel plating process of the triple plating ofnickel-copper-black nickel.
NOTE: It does not appear completely black like epoxy coatings. It is also still shiny, much like plain nickel plated magnets.
Zinc has a dull gray/bluish finish, that is more susceptible to corrosion than nickel. Zinc can leave a black residue on hands and other items.
Epoxy is basically a plastic coating that ismore corrosion resistant as long as the coating is intact. It is easily scratched. From our experience, it is the least durable of the available coatings.
Gold plating is applied over the top of standard nickel plating. Gold plated magnets have the same characteristics as nickel plated ones, but with a gold finish.