The coating of NdFeB magnets is to add a protective layer on the surface, which plays the role of anti-corrosion, anti-rust, and prolonging the service life. There are three most common coatings for NdFeB magnets, namely zinc plating, nickel plating, and epoxy coating.

1 In terms of price, galvanized coating is extremely advantageous, and the prices are ranked from low to high as zinc, nickel, and epoxy coatings.

2 After the nickel-plated surface treatment, the corrosion resistance of the magnet is higher, up to 96H salt spray without rusting, while the galvanized coating can only achieve 48H salt spray without rusting. Now the commonly used nickel-copper- Nickel plating method can achieve 120-200 hours of salt spray without rusting.

3 Compared with nickel plating, zinc plating has different surface coatings and different corrosion resistance, and its service life is lower than that of nickel plating. After a long time, the surface plating will easily fall off, causing the magnet to oxidize, thereby affecting the magnetic force.

4 Nickel plating is better than galvanizing in polishing, and the color is brighter. For those with high requirements on product appearance, nickel plating is generally selected. For some non-exposed magnets, galvanizing treatment is enough.

5 Epoxy resin coating: As the name implies, it is to add a layer of resin paint to the outside after nickel plating. In recent years, it has developed rapidly, and many buyers choose it. The advantage is that it can achieve the color you want.

No matter what kind of coating it is, it has its advantages, and the one that best meets your needs is the best.

Magnetic materials are now mainly divided into two categories, one is soft magnetic materials, the other is hard magnetic materials (permanent magnetic materials).

Soft magnetic material: high permeability, easy to be magnetized and easy to demagnetize. In the saturation state, the magnetic flux is large, the coercivity (Hc) is small, the total area of the hysteresis loop is narrow and long, and the loss is small (the total area of HdB is small). Contains magnetic pure iron, silicon steel sheet, (Fe, Ni) ferrite core, etc.

They are suitable for automotive relays, motors, transformer skeletons and magnetic rings of various high-frequency magnetic induction components.

Soft magnetic materials are easy to be magnetized and easy to demagnetize, and their main functions are magnetic conductivity, conversion and transmission of electromagnetic energy, and are widely used in various electrical energy conversion equipment. 

Soft ferrite is the most used in inductance components. Soft ferrite is a kind of composite oxide. It is a composite body sintered by some metal oxides through a ceramic process. It is higher than metal materials, so the eddy current loss is extremely small, and it can work under high frequency conditions. However, because the electromagnetic characteristics are affected by temperature, it is not suitable for high-power electromagnetic devices, and it is only suitable for working under medium-high-frequency and low-power conditions.

Hard magnetic material: large magnetic energy product (Hc) (>102A/m), large magnetic loss Br, large total area of hysteresis loop, and large loss. Such as tungsten steel material, carbon steel, AlNiCo alloy, etc. After being magnetized, it can maintain strong magnetism for a long time, and is suitable for making permanent magnets in magnetoelectric watt-hour meters, electromagnets in mobile phone earphones, and rare earth permanent magnet speakers.

At present, our factory produces hard magnetic materials, that is, permanent magnet materials, including AlNiCo, SmCo, ferrite and NdFeB. Among them, the most expensive is SmCo magnet, and the cheapest is ferrite.The one with the highest performance is the NdFeB magnet, but the one with the most stable performance and the best temperature coefficient is the AlNiCo magnet.You can choose different hard magnetic products according to different needs.

People familiar with magnet materials must have heard of Al-Ni-Co magnets. Alnico permanent magnet material is an alloy composed of metal aluminum, nickel, cobalt, iron and other trace metal elements. Al-Ni-Copermanent magnet material is the earliest widely used permanent magnet material, and its preparation process and technology are quite mature. Before the discovery of rare earth permanent magnet materials in the 1970s, Al-Ni-Co alloy was the strongest permanent magnet material, and was gradually replaced by ferrite permanent  magnets and rare earth permanent magnets.

AlNiCo is mainly produced by casting method, and powder metallurgy can also be used to make sintered magnets corresponding to cast magnets, but the performance is slightly lower. The casting process can be processed into magnets of different sizes and shapes. Compared with the casting process, the sintered products are limited to small sizes, and the dimensional tolerances of the produced blank products are small, and the casting processability is good. Among the permanent magnet materials, Cast AlNiCo permanent magnets have the lowest reversible temperature coefficient, and the working temperature can be as high as 500 degrees Celsius.

AlNiCo magnets have good temperature stability and aging stability, and are suitable for making instruments, motors, electroacoustic devices, and magnetic machinery. AlNiCo magnets are also often seen in other high temperature resistant fields

Magnet is used in many places in the home, it is actually in every corner of our life, but we do not find it.

Why is it so widely used? Because a lot of electrical appliances if there is no magnet, there is no way to work, I will introduce some common products to you from several aspects, you can have a look!

1. Microwave magnet: Almost every family has a microwave oven, which brings a lot of convenience to our daily life, but have you ever thought that the magnet plays a very important role in the microwave oven?

Normally, microwave ovens have two magnets in the magnetron that guide electrons to heat food.

2.Magnetic Knife Holder: Proper placement of sharp kitchen utensils, such as knives and forks, is a constant headache for many people. We all know that keeping a sharp knife in a drawer is very dangerous. Magnet manufacturers tell you that with the help of magnets, sharp knives and forks can be safely fixed to the wall of the knife holder.

3.Speaker magnets: Speakers are one of the most important pieces of equipment in our home audio system. You can find magnets in all speakers. Magnets can interact with coils in the speaker to produce sound. To produce a powerful sound, some small, powerful speakers use neodymium magnets.

4.Treadmill Magnets: Treadmills are a great choice for home exercise equipment. When we run on a treadmill, a magnet passes through a sensor to count revolutions as the machine moves.And convert it into distance information.

5.Laptop Magnets: Many of the gadgets in our regular laptops use magnets. Magnets, for example, are used in laptop speakers and small fan motors. In addition, you can find a magnet on the laptop's hard drive (usually on the lid) so that the computer can know whether the lid is open or closed.

6.Telephone magnets: We often use magnets on our mobile phones, while microphones and speakers use small magnets to capture and produce sound.

7.Handbag Magnets: Many girls like handbags not only because they are useful, but also because they are a fashion statement. Handbags are known for their use of magnets. These magnets can be assembled easily because of magnetism.

The magnet of vacuum cleaner: The magnet is also one of the important parts of vacuum cleaner. A vacuum cleaner works by using an electric motor to drive the blades to spin at high speed and generate negative pressure air in a sealed housing to collect dust. Vacuum cleaners' motors use powerful neodymium magnets to generate high suction.

What factors affect the price of magnets?Why are the quotations of magnets of the same material different?Many novice buyers will have many such questions, and now I will answer them in detail.

The quotation of magnets mainly depends on three factors, the purchase quantity, the specification shape, and the tolerance. The smaller the quantity, the higher the quotation; the more complex the shape, the higher the processing cost; the stricter the tolerance requirements, the higher the processing cost.

Obviously, different materials will naturally affect the price. Usually, the price of NdFeB is definitely higher than that of ferrite. In addition, NdFeB is not corrosion-resistant, and usually needs to be protected by coating. Common coatings are nickel plating, zinc plating, epoxy resin. Choosing a good coating is another cost.

Another example is sintered NdFeB, the price will change with the temperature requirements, the higher the performance, the higher the price.

Finally, and most importantly, the price of magnet raw materials has also been fluctuating.

If you have more questions, feel free to leave us a message, we look forward to communicating with you.

If you've ever purchased a NdFeB magnet, you surely know that almost all NdFeB magnets have a coating, so why don't ferrite magnets need a coating?

First of all, let us know about ferrite magnets, which are non- metallic magnetic materials, also known as magnetic ceramics, so there is basically no corrosion problem. It can be seen everywhere in life. For example, the speaker magnet in the radio is a ferrite magnet.

The magnetic performance of ferrite is not high. It is hard and brittle, but at the same time, it has many advantages,it is not easy to demagnetize, not easy to corrode, and it is cheap.

Similar to ceramics, it is generally formed by molds and sintered, and it is difficult to be machined, so most ferrite products have simple shapes and large dimensional tolerances.

Surface magnetism, also known as surface magnetic field, refers to the magnetic induction intensity at a

certain point on the surface of the magnet, and the unit is Gauss Gs or Tesla T (1T=10000Gs).

The parameter of surface magnetism is easy to measure. When the size of the magnet is determined, people

often judge the performance of the magnet by comparing the surface magnetism. When encountering some

magnets that are not suitable for routine measurement, particularly large or small, and special shapes,surface  magnetic measurement is particularly important.

But we need to know that the surface magnetism is the value measured by the Gauss meter in contact with a certain point on the surface of the magnet. The measurement point does not cover the entire surface of the product. The surface magnetism of different positions on the surface of the magnet is different, so take a certain point The value to measure the value of the entire face is incorrect For non-multipole magnetized and regular-shaped magnets, the central surface magnetism is generally measured.

The surface magnetism is easily affected by the external environment. When measured in different environments, the measured surface magnetism may be different. For the same magnet, using Gaussmeters from different manufacturers, the measured central surface magnetism may be different. The central surface magnetism of the N pole and S pole of the same magnet is also different. And don't forget that every gauss meter has an error of around 2%. 

It can be seen that the surface magnetic measurement is not objective, and it is not a parameter that can fully reflect the performance of the magnet. Therefore, it is usually not recommended as an evaluation indicator for product transactions.

We have been trading in the magnet industry for many years. A small number of customers indicated that the magnetic force of the permanent magnets they purchased was attenuated, and they usually suspected that it was the quality of the product itself. In fact, the quality of our products can stand the test of the market.Today let’s take a look at what factors lead to demagnetization of permanent magnets:

1. Mechanical vibration and impact cause demagnetization.

2. High temperature demagnetization, the increase in use temperature will cause the magnet to demagnetize.

3. The change of the external current magnetic field causes demagnetization.

4. External magnetic field interference causes demagnetization.

As we move into 2025, the custom manufacturing landscape is evolving rapidly. The rise of advanced technologies, demand for greater efficiency, and an increasing focus on sustainability are reshaping the way products are designed, produced, and delivered. Companies that can adapt to these changes and embrace innovation will remain at the forefront of the industry. Here's a look at some of the top trends in custom manufacturing and how they’re influencing businesses worldwide.

 

1. Advanced Manufacturing Technologies Take Center Stage

 

In 2025, cutting-edge technologies such as 3D printing, CNC machining, and automation are not just buzzwords—they are transforming the manufacturing process. These advancements allow for faster prototyping, improved precision, and more complex designs than ever before. For companies like ours, with state-of-the-art equipment and deep expertise in CNC machining, sheet metal fabrication, and injection molding, this trend means we can deliver high-quality custom parts with unmatched speed and precision. Whether you need rapid prototyping, small-batch production, or high-volume manufacturing, we are equipped to meet your needs with the highest level of efficiency.

 

 

2. Demand for Sustainability Drives New Practices

 

Sustainability is becoming a key focus in custom manufacturing, as businesses and consumers increasingly prioritize environmentally-friendly practices. Manufacturers are incorporating eco-friendly materials, reducing waste, and improving energy efficiency in their processes. Our company is committed to sustainability, not just through the materials we use but also through our lean manufacturing processes that minimize scrap and optimize resource use. By keeping up with these green initiatives, we are not only helping clients meet their sustainability goals but also contributing to a cleaner, more responsible future for the industry.

 

3. Customization at Scale—The New Competitive Edge

 

As consumer demand grows for tailored products, custom manufacturers are responding by providing more personalized solutions at scale. The ability to offer bespoke products without sacrificing production efficiency is increasingly becoming a differentiator in the market. Our company’s strength lies in our ability to provide end-to-end customization—from initial design and prototyping to full-scale production. With our comprehensive service offering, including CNC machining, injection molding, and surface treatment, we can meet the most intricate customer requirements, ensuring the final product perfectly matches their vision.

 

 

4. Shortened Lead Times and Speed to Market

 

In today’s fast-paced market, speed is everything. As companies aim to reduce time-to-market, the need for rapid prototyping and quick production has never been more critical. At our company, we specialize in meeting tight deadlines without compromising quality. Thanks to our advanced production equipment and ISO-certified quality management systems, we can offer quick turnarounds, from prototype to finished product. Our customers know they can rely on us for timely deliveries and flawless results, helping them maintain a competitive edge in their respective industries.

 

5. Globalization and the Need for Flexibility in Sourcing and Production

 

With global supply chains still in flux, businesses need manufacturing partners that can adapt quickly to changes in sourcing, materials, and logistics. Our global perspective, paired with a highly flexible production capacity, ensures we can handle orders from across the world while maintaining high standards of quality and service. Whether it's medical devices, consumer electronics, or automotive components, we’re prepared to meet the most stringent industry requirements and deliver customized solutions that help our clients stay ahead of the competition.

 

The Future of Custom Manufacturing is Here

 

As custom manufacturing continues to evolve in 2025, businesses need partners that combine cutting-edge technology, speed, and a commitment to quality. Our company stands at the forefront of these trends, with the capability to deliver superior products and services that meet the demands of today's market. Whether you’re looking to streamline your production process, reduce lead times, or create the next innovative product, we have the expertise, equipment, and commitment to help you succeed. Contact us today to discuss your custom manufacturing needs, and let’s take your project to the next level.

 

 

In prototype manufacturing, surface finishing plays a crucial role in determining the final product’s aesthetics, functionality, and durability. While the primary goal of prototyping is to validate design concepts and test functionality, surface treatment ensures that the prototype closely resembles the end product in terms of appearance and performance.  

 

 Enhancing Aesthetics and Functionality  

 

Surface finishing techniques, such as painting, anodizing, sandblasting, and electroplating, enhance the visual appeal of a prototype by improving texture, gloss, and color consistency. Additionally, certain finishes can reduce friction, enhance grip, or provide electrical insulation, making them essential for functional testing in real-world applications.  

 

 

Improving Durability and Performance  

 

Many prototypes undergo surface treatments to improve wear resistance, corrosion protection, and mechanical strength. For instance, anodizing aluminum parts creates a hard and corrosion-resistant layer, while powder coating provides a durable finish for plastic and metal components. These treatments help extend the lifespan of prototypes, especially in harsh environments.  

Aligning with Production-Grade Standards  

 

Prototypes that mimic production-grade finishes provide better insights into how the final product will look and perform. This is particularly important for industries like automotive, aerospace, and medical devices, where regulatory compliance and material properties are critical. By applying appropriate surface treatments, manufacturers can refine designs and avoid costly modifications later in production.  

 

 Choosing the Right Surface Finish  

 

The choice of surface finishing depends on the prototype’s purpose, material, and intended application. Whether it’s a simple aesthetic enhancement or a protective coating for functional validation, selecting the right finish ensures a more accurate and reliable prototype.  

 

At LEADMAKE, we offer a wide range of surface finishing options to meet your specific prototyping needs. Contact us today to explore how we can help bring your designs to life with precision and quality！