Why Strong Magnets Need Electroplating? Things You Should Know

The super strong magnet is a black solid sintered from rare earth elements (neodymium, iron, and boron), which are extremely prone to corrosion. To avoid corrosion damage, magnet manufacturers generally apply surface protection, such as electroplating with zinc or nickel.

So, can super strong magnets be left unplated? The answer is yes, but it is not recommended. When exposed to extreme temperatures, liquids, or steam, the surface of these magnets will rapidly oxidize, resulting in performance degradation or even failure. As an effective protective measure, electroplating forms a dense layer of metal or alloy on the magnet's surface, effectively isolating it from oxygen, moisture, and other corrosive substances in the external environment, thereby extending the magnet's service life.

The specific advantages of electroplating for super strong magnets are as follows:

• The surface of the magnet becomes smoother and brighter after electroplating, which is particularly important for strong magnetic materials that need to be displayed or used as decorative items.
• Super strong magnets are sintered from rare earth elements and are easily damaged by collisions. Electroplating can increase their hardness.
• Electroplating effectively isolates the magnet from air and moisture, preventing corrosion.