Web Menu

Product Search

Language

Share

Custom NdFeB Magne Surface Protection

Home / Product / Neodymium Iron Boron Magnet / NdFeB Magne Surface Protection

NdFeB Magne Surface Protection Manufacturer

NdFeB magnets contains iron they corrode easily due to the high electrochemical activity of Nd   and the high content of Iron.As total magnetic failure is possible due to corrosion, an appropriate surface coating or finish is needed the protect the magnet.
The standard coating is a triple layer plating of Nickel-Copper-Nickel (Ni-Cu-Ni). Unless requested otherwise, this Ni-Cu-Ni coating is always applied to the magnets. The Znic (Zn) coating is also wilely used due to its low cost.   However, it can not be applied in the environment of pH<4 and pH>9.It should be noted that the level of protection given by any coating depends on the environment the magnet will be subjected to and how the coating is looked after. If the coating is scratched or broken, it will not offer protection from moisture.

NdFeB Magne Surface Protection
Classification of surface treatment of NdFeB

Coating

Thickness(μm)

Color

SST(hrs)

PCT(hrs)

Characteristics

BW-Zn

4-15

Bright blue

≥24

–

Secondly commonly used single layer coating. Poor corrosion resistance.

Color-Zn

4-15

Shining color

≥48

–

Corrosion resistance is better than BW-Zn.

Ni-Cu-Ni

5-20

Bright silver

≥48

≥48

Most regular used multi-layer coating. Excellent humidity and salt spray resistance.

Electroless Ni

5-20

Dark silver

≥72

≥48

Excellent humidity and salt spray resistance with uniform appearance.

Ni-Cu-Ni-Au

5-20

Golden

≥72

≥96

Excellent electrical conductivity and decorative performance.

Ni-Cu-Ni-Ag

5-20

Silver

≥72

≥96

Excellent electrical conductivity and decorative performance.

Ni-Cu-Ni-Sn

5-20

Silver

≥72

≥96

Excellent humidity resistance.

Phosphate

1-3

Dark grey

–

–

Temporary protection.

Aluminum

2-15

Bright silver

≥24

≥24

Noticeable coating.

Epoxy resin

10-30

Black/Grey

≥72

≥72

Excellent humidity and salt spray resistance. Superir binding force.

Parylene

5-20

Colorless

≥96

–

Excellent humidity, salt spray, corrosive vapors, and solvents resistance. Free of pore.

Everlube

10-15

Golden yellow

≥120

≥72

Excellent humidity resistance.

Teflon

8-15

Black

≥24

≥24

High temperature and rub resistance. Self-lubricant and 100% water-proof.
About Our Company

Magnetic material core technology research and development team

Hangzhou Zhiyu Magnetic Technology Co., Ltd. is China NdFeB Magne Surface Protection manufacturers and NdFeB Magne Surface Protection factory. Hangzhou Zhiyu Magnetic Technology Co., Ltd. is located in Tonglu County, Hangzhou City. It mainly focuses on the research and production of samarium cobalt permanent magnetic materials and magnetic components, and also sells magnetic steel and magnetic components such as neodymium iron boron and aluminum nickel cobalt.
The products are widely used in industries such as national defense and military, aerospace, permanent magnet (high-speed) motors, hydrogen energy compressors, automotive electronics, 5G communication, petrochemical, instrumentation, etc. The variety of samarium cobalt products is complete, with an annual production capacity of over 200 tons;
Fully covering the entire series of samarium cobalt grades of 1:5 and 2:17, covering the entire series of Br0.5T-1.2T;
Stable production of high-performance samarium cobalt magnetic steel with Br ≥ 1.16T and Hcj≥25KOe;
Stable production of Br≥0.96T low-temperature coefficient series products, with residual magnetic temperature coefficient a<-0.01%;
Stable production of ultra-high temperature (temperature resistance ≥ 550 ℃) and high Br (Br ≥ 1.02T) samarium cobalt magnetic steel;
Provide one-stop services from design to product application.

  • 0+
    Production technology experience
  • 0+
    Enterprise employees
  • 0Ton+
    Productive power
  • 0+
    Exported countries

Certificate

News

Industry knowledge

What are the common methods used for surface protection of NdFeB magnets?
To protect the surface of NdFeB (neodymium iron boron) magnets, several common methods are utilized. These methods aim to prevent corrosion, oxidation, and damage to the magnet surface. Here are some common surface protection methods for NdFeB magnets:
Nickel Plating: Nickel plating is a widely used method for surface protection of NdFeB magnets. A thin layer of nickel is electroplated onto the magnet surface, providing a protective barrier against corrosion and oxidation. Nickel plating also enhances the magnet's durability and resistance to wear.
Epoxy Coating: Epoxy coating involves applying a layer of epoxy resin onto the magnet surface. This coating acts as a protective barrier, shielding the magnet from moisture, chemicals, and physical damage. Epoxy coatings are commonly used when the magnet requires insulation or protection in harsh environments.
Zinc Plating: Zinc plating is another surface protection method used for NdFeB magnets. Similar to nickel plating, a thin layer of zinc is electroplated onto the magnet surface. Zinc plating provides corrosion resistance, particularly in applications where the magnet may be exposed to moisture or humidity.
Phosphate Coating: Phosphate coating involves applying a layer of phosphate onto the magnet surface. This coating provides corrosion resistance and can enhance the adhesive properties for subsequent coatings or adhesives. Phosphate coatings are often used as a pre-treatment step before applying other protective coatings.
Gold or Silver Plating: Gold or silver plating can be used for surface protection in applications requiring high electrical conductivity or for decorative purposes. These precious metal coatings provide corrosion resistance and an aesthetically pleasing finish.
Polymer Film: A thin polymer film, such as polyethylene or polytetrafluoroethylene (PTFE), can be applied to the magnet surface. These films provide protection against moisture, chemicals, and physical damage.
How does surface protection impact the performance and lifespan of NdFeB magnets?
Surface protection plays a crucial role in maintaining the performance and extending the lifespan of NdFeB (neodymium iron boron) magnets. Here are some ways in which surface protection impacts NdFeB magnet performance and lifespan:
Corrosion Prevention: NdFeB magnets are susceptible to corrosion when exposed to moisture, humidity, or certain chemicals. Surface protection methods such as nickel plating, epoxy coating, or zinc plating create a protective barrier that prevents direct contact between the magnet material and corrosive substances. By minimizing or eliminating corrosion, surface protection helps maintain the magnetic properties and performance of the magnet over time.
Oxidation Resistance: NdFeB magnets can undergo oxidation when exposed to air or certain environmental conditions. Surface protection methods act as a barrier against oxygen, preventing the magnet from oxidizing and losing its magnetic strength. By inhibiting oxidation, surface protection helps preserve the magnet's performance and longevity.
Wear and Physical Damage Resistance: NdFeB magnets can be susceptible to wear, scratching, or physical damage due to contact with other materials or surfaces. Surface protection methods such as epoxy coatings or polymer films provide a protective layer that helps reduce friction, minimize wear, and guard against physical damage. This protection ensures the magnet retains its shape, structural integrity, and magnetic properties for an extended period.
Category