What happens to magnets without a surface treatment?

Among the inquiries, ferrite magnets and neodymium magnets are the most inquired about, some of them have plated surfaces and some have no plating, so what happens to the magnets whose surfaces are not treated with plating?

If magnets are not surface treated, problems such as oxidation, rust, corrosion, or wear may occur, depending on the material of the magnet. The following are the consequences of not treating the surface of several common types of magnets.

Rectangular neodymium magnets with bright nickel plating

The consequence of uncoated neodymium magnets is that they are prone to oxidization and rust, especially in humid environments, where untreated neodymium iron boron magnets will quickly develop rust spots on their surface.

As for ferrite magnets, it is inherently corrosion-resistant and is fine without plating treatment, it has no effect, but some applications may require painting or nickel plating treatment.

Samarium cobalt magnets, like ferrite magnets, have better corrosion resistance and will not rust easily even without surface treatment, but may oxidize slightly when used for a long time in a humid environment.

Alnico magnets will rust slowly if the surface is not treated, and the appearance will deteriorate after long-term exposure, but the magnetic force is more stable.

Rubber magnets, which are made from a composite of magnetic powder and rubber, are not susceptible to rust, but the surface may deteriorate, crack, or harden if exposed to high temperatures or ultraviolet light for long periods of time.

The above is the magnet without surface treatment will be how the introduction, different types of magnets for the surface treatment of different needs, neodymium magnet is the most need for plating protection, and ferrite and samarium cobalt relatively corrosion-resistant, you can do without the surface plating treatment.

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