Are neodymium magnets waterproof? (2024)

FAQs

Can neodymium magnets be used outdoors? ›

Not all magnets are equally suited for outdoor use. Regular neodymium magnets are very susceptible to rust, which is why we do not recommend them for exterior applications. On the other hand, water-proof neodymium and ferrite magnets are ideally suited for that purpose.

But remember, neodymium magnets are not waterproof. They will rust or corrode in the presence of moisture. If used underwater, outdoors or in a moist environment, they can corrode and lose magnetic strength.

Here are a few steps to help protect your neodymium disc magnets: Epoxy Resin: Coat the magnet in a thick layer of marine-grade epoxy resin. This waterproof material forms a solid barrier between the magnet and the saltwater, helping to prevent corrosion.

Nickel-coated neodymium magnets are usually referred to as indoor magnets. They should be kept away from water (especially salt water), as exposure to moisture can cause them to corrode and lose their magnetic strength over time.

Neodymium Magnets are the most powerful of all permanent magnets. The plastic coated neodymium magnets can be used in water or humid environments is without any risk of corrosion, because the polypropylene coating completely surrounds the neodymium magnet.

Neodymium magnets are like iron; without protection, they rust easily. To prevent corrosion, most neodymium magnets are plated with a three layer, nickel-copper-nickel plating. This particular plating combination has been the preferred corrosion protection for many years.

The disadvantages of neodymium magnets are that they sensitive to heat and require careful handling. They are used widely for industrial products and in daily items such as clothing and household products. Our customers range from those who want to buy a small but strong magnet to companies making magnetic products.

A quick fix might be to put petroleum Jelly/Vaseline/Silicone grease into the bag with the magnet. These will repel water and keep the magnet dry. Heat sealing the bag with a cheap dollar store food bag sealer should help, sort of like the expensive bag sealer from Staples.

How long will a neodymium magnet last? Neodymium magnets are permanent magnets, and lose a fraction of their performance every 100 years if maintained within their optimum working conditions.

Can neodymium magnets be turned on and off? Generally, no. The neodymium magnets we provide are also called, “permanent magnets.” The word “permanent” means they stay magnetized for a long time. They are always on.

What is the best coating for neodymium magnets? ›

Nickel-Copper-Nickel (Ni-Cu-Ni) Coated Magnets

Ni-Cu-Ni is by far the most common and popular coating for neodymium magnets. This is because it's cost effective and excellent at preventing corrosion from ambient air. They have a reflective silver appearance which gives them an elegant and high-quality appearance.

Neodymium magnets are strongly attractive, even from several inches away. The force is powerful enough to pinch skin and cause bodily injury. Depending on the size of the magnet, it could break a finger.

Water doesn't destroy a magnet because it doesn't do anything to the magnetic domains. If you don't get these domains to point in all different directions then it's just going to still be a magnet. Here's a method to mess up those magnetic domains — heat up the material.

When exposed to heat, neodymium magnets will become weaker. They won't necessarily lose their ability to produce a magnetic field. Neodymium magnets, however, will typically produce a weaker field after being exposed to heat. Exposure to temperatures of 175 degrees Fahrenheit or above will weaken neodymium magnets.

Caption Options. In testing at the Bimini Biological Research Station shark lab in the Bahamas, Stroud and Herrmann have found that sharks dramatically avoid magnets made from neodymium, iron and boron. The magnets even rouse sharks from tonic immobility, a coma-like state induced by turning them upside down.

To prevent neodymium magnets from rusting, it is important to store them in a dry place and to protect them from moisture as much as possible. If the magnets do get wet, it is important to dry them off as soon as possible to prevent rust from forming.

However, as soon as the Neodymium Rare Earth Tube Magnets are exposed to temperatures exceeding 212 degrees F, the magnetic strength becomes compromised. On returning to normal operating temperatures below 176 degrees F, there is an irreversible loss in magnetic strength and permanent damage.

Good neodymium magnets (especially N52 rated ones) will still pull towards each other through nearly an inch of wood. Line this point up with the bottom of the cabinet door and drill a hole there. Insert another magnet that's just slightly recessed from the surface.