• industrial neodymium magnet china
          Empowering you with magnetic solutions

          For tech companies who use permanent magnets in their innovative products, our know-how in magnet engineering and manufacturing speeds up your project sucess.

          Permanent Magnets

          Find high-performance magnets for diverse applications, supported by our expert knowledge and dedication to quality.

          Magnetic Assemblies

          Discover custom-designed, high-performance assemblies for various applications, backed by our expertise and commitment to precision and reliability.

  • About Tengye
        • Jonah Jin

          As the Managing Director of Tengye, I bring a wealth of knowledge and experience to the table, with expertise spanning sales, technical aspects, purchasing, and more. My all-around proficiency in the world of magnets and magnetic assemblies ensures that I can provide comprehensive solutions to meet our clients’ diverse needs. 

          Through my commitment to sharing industry insights and innovations in our blog, I aim to establish a strong foundation of trust and transparency between our valued customers and myself. Rest assured, at Tengye, your magnetic solutions are in capable and experienced hands.

          Blog Categories
  • Contact
Quote Now

Coatings for Neodymium Magnets

Special requirements of an application or the magnet material itself – NdFeB in non-corrosive design – can make it necessary to provide magnets with a coating. However, there is no universal coating, the respective coating must be adapted to the application.

Metallic and Organic coating for neodymium magnets

  • Metallic coatings offer good protection against moisture and vapor, especially as multiple layers. But they can still be damaged in corrosive media. Metallic coatings such as Nickel coating are suitable for all sintered neodymium magnets.
  • Organic coatings are more resistant to aggressive media, but are usually less suitable for mechanical loads on the magnets. Organic coatings can be used on all types of permanent magnets.

Coating type

Thick (μm)

Color

WorkingTemp. (°C)

PCT (h)

SST (h)

Characteristics

White Zn

5-20

Blue and White

≤160

–

≥48

Anodic coating, low cost

Colored Zn

5-20

Iridescent

≤160

–

≥72

Anodic coating, low cost

NiCuNi

10-30

Silver White

≤390

≥96

≥48

High temperature resistance

PVD Al

5-25

Silver White

≤390

≥96

≥96

Excellent adhesive force,
high temperature resistance

Epoxy

15-25

Black

≤200

–

≥360

Insulation, excellent thickness consistency

NiCu+Epoxy

20-40

Black

≤200

≥480

≥720

Insulation, excellent salt spray resistance

NiCuNi+Au

10-30

Golden

≤200

≥480

≥72

good for decoration, excellent durability,
common in medical applications

Spray Epoxy

10-30

Black

≤200

≥192

≥504

Insulation, high temperature resistance

Phosphating

–

–

≤250

–

≥0.5

low cost, temperory protection

Achieve your project goals with our support. Contact us now.

We are dedicated to empowering you with magnets and magnetic solutions.

Send Inquiry

Get a free quote or consultation now

© 2023 Hangzhou Tengye Magnetic Materials Co., Ltd.

Tell us your project by filling out this inquiry form or send us an Email, we will get back to you within 24 hours.

Lu Qinsheng

Every customer deserves to be treated professionally and responsively.

Inquiry Form