High Temperature resistant Nickel Coated N52 NdFeB Block Rectangular Rare Earth Neodymium Magnet

Understanding Neodymium Magnets

Explore the power of our 25mm x 10mm x 3mm precision engineered premium quality excellent thermal stability  high torque output High Temperature resistant Nickel Coated N52 NdFeB Block Rectangular Rare Earth Neodymium Magnets , engineered for high-performance applications. Known for their exceptional temperature resistance and reliability, they are perfect for automotive sensors, electric motors, renewable energy, audio systems, and scientific research.

Our Sm2Co17 magnets excel in harsh environments, withstanding temperatures up to 350°C. While their magnetic strength is slightly lower than neodymium magnets, their resistance to demagnetization and corrosion makes them ideal for heavy-duty industries, energy production, and automotive engineering, ensuring long-lasting stability and durability.

25mm x 10mm x 3mm Neodymium Cobalt block magnets

These  customized corrosion resistant high holding capacity precision engineered high torque output High Temperature resistant Nickel Coated N52 NdFeB Block Rectangular Rare Earth Neodymium Magnets  are perfect for various home applications, such as securing light items, organizing tools, and creating magnetic fixtures. In professional settings, they are essential in manufacturing, engineering, and product design due to their consistent and strong magnetic force. These precision engineered high torque output energy efficient High Temperature resistant permanent Nickel Coated N52 NdFeB Block Rectangular Rare Earth Neodymium Magnets  are commonly used in the printing industry to hold materials during production and in scientific research to stabilize experimental setups. These magnets are trusted across multiple industries, providing dependable performance for both personal and commercial use.

Surface Finish: Ni-Cu-Ni Coating

These precision engineered high torque output High Temperature resistant Nickel Coated N52 NdFeB Block Rectangular Rare Earth Neodymium Magnets are finished with a durable triple-layer Ni-Cu-Ni (Nickel-Copper-Nickel) coating that enhances corrosion resistance and maintains a clean, professional look. This layered shield protects the magnet’s core from oxidation and wear in mildly humid environments, making it suitable for long-term use in a range of settings. For more aggressive environments, epoxy or other advanced coatings may offer enhanced protection.

APPLICATION EXAMPLES

Material Neodymium (NdFeB)

Product Name: precision engineered high torque output High Temperature resistant Nickel Coated N52 NdFeB Block Rectangular Rare Earth Neodymium Magnets
Magnetic Grade: N35   (Br ≥ 14.6 kGs, Hcj ≥ 20 kOe)
Dimensions: L25mm x 10mm x 3mm (customizable)
Dimensional Tolerance: Length ±0.05mm, Width ±0.05mm, Thickness ±0.05mm
Operating Temperature: ≤90°C (high-temp version available)
Density: ≥7.5 g/cm³
Surface Magnetic Field: 3800 ±200 Gauss (measured with TM-801 Gauss meter)
Magnetic Flux: 2.3 mWb (measured with fluxmeter)

Manufacturing Process

The product is manufactured through the following key processes:

● A high-speed grinding wheel shapes the magnet's surfaces with tight dimensional tolerances.

● Coolant fluid is applied to control heat, reduce surface stress, and ensure a smooth finish.

● The result is a uniform, precisely dimensioned magnet with clean edges—ideal for high-performance applications.

Surface Treatment & Plating

To enhance corrosion resistance and appearance:

Default Plating: Triple-layer Ni-Cu-Ni (customizable).

Standard Thickness: Ni (3μm) + Cu (5μm) + Ni (4μm).

Optional Plating: Single-layer Zn (5μm) for cost-sensitive projects.

Appearance & Dimensional Inspection

Visual Inspection: Under standardized lighting, trained QC staff check for cracks, chipping, inclusions, pores, or oxidation

 Reliability Testing

To ensure magnet maintain excellent corrosion resistance in complex or harsh environments, the salt spray test is an essential accelerated aging method. It simulates long-term exposure to marine climates, industrial pollution, humidity, or acidic and alkaline conditions, allowing for a reliable evaluation of the protective performance and durability of the magnet's surface coating.

 Constant Temperature & Humidity Test: Performed under 85°C and 85% RH for 96–500 hours. Performance and appearance are compared before and after testing.

Packaging & Transportation

Defect Elimination: 100% inspection using calipers, projectors, visual checks, and automated systems to reject cracked, chipped, oxidized, or coated-defective magnets.

Uniform Magnetization & Structured Arrangement: Magnets are uniformly magnetized and arranged for optimal packaging based on customer requirements to ensure performance and facilitate automated assembly.

Vacuum Sealed Packaging: Multi-layer vacuum sealing with moisture barriers, desiccants or nitrogen, prevents corrosion and magnetic interference during storage and shipping.

Customized Outer Packaging: Shock-proof, moisture-resistant, and anti-magnetic leakage packaging (e.g., multilayer cartons, plastic boxes, metal shielding) ensures compliance with international logistics standards. Each box includes a product list, labels, and tracking codes.

We know logistics is more than moving goods — it’s about delivering your promise. Our trusted solutions offer:

Global shipping coverage

Real-time tracking from origin to destination

Enhanced safety at every stage

Dedicated service with customized shipping plans

With our robust land, sea, and air network, your business moves faster, safer, and with complete confidence.

 Why Choose us ？

Dongguan Jinconn New Material Holdings Co., Ltd. is a publicly listed enterprise offering integrated R&D, manufacturing, and sales of rare earth magnets. Based in Xiaohe Industrial Zone, Daojiao Town, Dongguan, we serve clients across China and globally.

20+ years of magnet manufacturing expertise

Strict quality control & customization capability

Multilingual technical support with global delivery

RoHS and REACH compliant

Please contact us for free samples, magnet customization solutions, and MSDSRoHS, ISO 9001, QC080000, IATF 16949, ISO 14001, ISO 27001 or other relevant certificates!

  Usage Precautions？

⚠ Safety & Handling Guidelines

Handle with care: Neodymium magnets are brittle and can chip or crack if dropped or impacted.

Avoid injury: Always slide magnets apart—do not force or pry them to separate.

Check polarity before use: Incorrect installation may cause malfunction or damage to equipment.

Store properly: Keep in a dry, neutral environment; avoid contact with moisture, acids, or corrosive substances.

Keep away from sensitive electronics: Do not place near hard drives, magnetic cards, pacemakers, or similar devices.

Customization & Services

Customizable magnet dimensions, geometry, and surface coatings (including layer count, thickness, and color)

Precision magnetization orientation and adjustable magnetic field intensity

Optional laser marking for logos, part numbers, or traceability codes

Specialized packaging and pull-force testing tailored to your application needs

With deep expertise in magnetic materials, we deliver solutions for industries like EVs, smart manufacturing, and electronics. Our strong technical capabilities and product consistency have earned the trust of customers worldwide.

Contact Us：

 Phone/WhatsApp/WeChat: +86 13829120676

 Email: Info@jinconn.com

 Address: Xiaohe Industrial Zone, Daojiao Town, Dongguan City, Guangdong Province, China.