China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Ferrite magnets, a black appearance of the magnets, we are no strangers, cheap and widely used, can be processed into a variety of shapes and types, today to introduce it will corrode?
Ferrite magnets usually have good resistance to corrosion, but are not completely immune to corrosion. Ferrite magnets are generally made of ferrite material, which is highly resistant to most chemically corrosive substances, such as water, oil, and solvents. However, for certain strong oxidizing acids or bases, ferrite magnets may still corrode to some degree.
Picture shows a convex square ferrite magnet with holes.
To protect ferrite magnets from corrosion, the following measures can be taken:
Anti-corrosion coating:
Plating: commonly used methods are galvanized, nickel, chrome or metal plated coatings to enhance the corrosion resistance of the magnet.
Spraying: Special anti-corrosion sprays or coatings such as polymer coatings (e.g. epoxy, polyurethane) are used to cover the magnet surface.
Painting: Select a corrosion-resistant paint to cover the magnet surface, which provides a layer of protection against corrosion.
Protective Coating:
Plastic Coating: utilizing thermoplastic or thermoset resins to coat the magnet, providing mechanical protection while reducing the effects of the external environment.
Polymer Coated: Covers the surface of the magnet to increase its abrasion and scratch resistance.
Surface Finishes:
Anodizing: A chemical treatment applied to the surface of a ferrite to form an oxide layer that increases its corrosion resistance and hardness.
Magnet Encapsulation: Place the magnet in a waterproof, moisture-proof encapsulation container to protect its surface from the external environment.
In summary, although ferrite magnets have a certain degree of corrosion resistance, but still need to be based on the specific use of the environment and media to carry out appropriate protective measures to extend its service life.
Related Ferrite Q&A;
Can ferrite ceramic magnets rust?