ネオジム磁石メッキやコーティングオプション

ネオジム磁石メッキやコーティングオプション

The following is a list and description of available coating options for custom magnets. 注意: Magnets can only be electro-plated before magnetization. if the plating is compromised after magnetization via abrasion or deliberate machining they cannot be re-plated. Some coatings such as plastic may be done after magnetization, If the process does not exceed the magnets maximum operating temperature.

Why do magnets need to be plated?

Oxidization (rust)

NdFeB magnets will oxidize(rust) if left exposed. When a plating wears down or cracks, the exposed area will oxidize. An oxidized area will not result in complete degradation of the magnet, only the oxidized area will lose its strength. However the magnet will lose some structural integrity and become more susceptible to breakage.

Durability

Depending on shape, permanent magnet substrate is brittle. A multilayered metal plating like nickel or zinc improves the magnets resistance to chipping and wear, particularly around corners.

Harsh Environments.

Platings vary in their tolerance of different harsh chemicals and abrasion. Salt and humidity in regions near the ocean are commonly overlooked when selecting a plating. Be sure to consider the magnets environment when selecting a plating.

The most common type of plating for neodymium magnets Nickel (ニッケル - 銅 - ニッケル) Intended for indoor use. It has proven to be very resilient when subjected to normal wear and tear. However it will corrode oudoors in prolonged exposure to salt water, salty air, or harsh chemicals.

メッキ \ コーティング Appearance Indoor
Use
Abrasion
(Wear)
Humidity Water Salty Air (Near Ocean) Salt Water 厚さ 価格
ニッケル (ニッケル - 銅 - ニッケル)

A very durable multilayer combination of nickel, 銅, ニッケル. The most common plating.

Excellent 良い 良い Bad Bad Bad 10-20 Microns Low
Zinc Plating (亜鉛)

2nd most common plating, Zinc is a standalone plating with only one layer. It is a self- sacrificing coating, meaning when the material corrodes the outside turns white creating a durable layer of protection.

Excellent Excellent Excellent 良い 良い Bad 8-10 Microns Low
エポキシ (Ni-Cu-Be)

Epoxy plating is multilayered in Nickel, Copper, エポキシ. Great for outdoor applications. However it is not very abrasion resistant and prone to scratching.

Superior Bad Superior Superior Excellent Excellent 15-25 Microns Medium
ゴールド (Ni-Cu-Au)

Well known for its corrosion resistance. Layered in Nickel, Copper & Gold on top. Works very well in water applications.
The gold layer is very thin and adds only a few cents per magnet.

Superior 良い Superior Superior Superior Superior 10-20 Microns High
Plastic

Plastic is the most corrosion resistant. However its is thicker than other platings. A mold is required to create the plastic shell.

Superior Superior Superior Superior Superior Superior 250-500 Microns Medium
Phosphate

Phosphate is a temporary coating that will last only a few months. It is normally used when the magnet is going to be over-molded or encased in a plastic part that will act as the final protective layer.

良い
(臨時雇用者)
Bad Bad Bad Bad Bad 1-2
Microns
Low

If you have any questions about plating don’t hesitate to call.電話番号: +1 347-470-5165 9am – 5pm PST (MondayFriday) or email: [email protected]

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