Why Do Magnets Need a Special Coat?

NdFeB magnets are like cookies. If you leave them out, they can get bad.

• Water can make them rusty.
• Air can make them weak.
• Bumps can make them break.

So, we put a special coat on them. It is like a raincoat for the magnet! We call this surface treatment. This aligns with our dedication, highlighted at neodymium magnets factory, to delivering top-quality products.

Different Coats for Different Jobs

There are many kinds of coats. Here are some important ones:

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1. Nickel-Copper-Nickel Coat

This is like a sandwich! It has three layers:

1. Nickel
2. Copper
3. Nickel

It is very good at stopping rust. It can keep magnets safe for over 720 hours in a salt spray test. This test is like making the magnet sit in salty air. We make sure to apply the right magnet coating for lasting protection.

We use this coat for car parts. Cars drive in rain and snow. The coat keeps the magnets strong. One car company said this coat made their magnets 62% less likely to break!

2. Zinc-Nickel Coat

This coat is like a superhero against rust. It has zinc and nickel.

It can last for over 1,200 hours in the salt spray test! This is like many, many years near the sea. This is a crucial aspect of the quality we ensure for our customers at our NdFeB magnets factory.

We use this for wind turbines, the big fans that make power. They sit out in the weather all the time. This coat keeps them working for 10 years!

3. Epoxy Coat

Epoxy is like a tough plastic. it is for industrial machines and household appliances.

It is very good with chemicals. Some chemicals can eat other coats. But epoxy is strong.

We use this for magnets in doctor‘s machines, and for medical devices. The coat keeps the inside super clean!

4. Parylene Coat

This coat is very, very thin. You can barely see it. But it is very strong.

It stops almost all water. It is like a perfect raincoat! we use this coat for aerospace and electronics. We use it for magnets in spaceships. They are in space, for power tools, and for magnetic modules. It can get very cold and very hot in space. This coat can handle that! One company, found parylene keeps magnetic flux stability.

5. Phosphating Coat

This coat is like a helper in the automobile industry.

It does not stop rust all by itself. But it helps other coats stick better.

It is like a sticky tape between the magnet and the coat.

We use this for big machines. The machines shake a lot. This coat stops the main coat from peeling off, and helps the tribological properties. Choosing the correct magnet grade is also essential for these applications.

How We Pick the Right Coat

It is like picking shoes.

• If you are going to the beach, you pick sandals.
• If you are going hiking, you pick boots.

We do the same for magnets.

• If the magnet will be near salt water, we pick a robust protective treatment.
• If the magnet will be inside a clean room, we need a different coat.

We make sure to meet the requirements of industrial magnet warranties and industrial magnet maintenance. We offer inorganic sealants and sacrificial anode coatings. We even can put on tungsten carbide coatings.

We do tests. We spray salty water on the magnets. We see how long the coat lasts. You should always ask for these test reports! This is good for industrial and consumer electronics.

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Bad Things that Can Happen (And How We Stop Them)

Even with a good coat, things can go wrong. But we know how to fix them!

• Peeling Coat: This is like skin peeling after a sunburn. We make the magnet very clean before we put on the coat. We use a special cleaner called plasma.
• Hydrogen Embrittlement: This makes the magnet weak, like a brittle cookie. We bake the magnet in a special oven. This gets rid of the hydrogen. We use VCI, or vapor corrosion inhibitors.
• Porosity: This is like tiny holes in the coat. Water and air get through. For magnetic shielding requirements we use a layer of nickel under the main coat. This stops the holes. This process is ideal for meeting the needs of electromagnetic interference (EMI) protection in electronics.

We understand magnet brittleness mitigation, and the magnet life cycle. Corrosion under insulation (CUI) is a problem we help to solve, and meet the needs of NdFeB waste management.

Keeping Your Magnets Happy

When you own magnets, you must follow magnet storage guidelines.

• Keep the magnets in a dry place. We have humidity chamber testing.
• Do not let them get too hot or too cold.
• Clean them with a soft cloth. Do not use harsh cleaners.
• We have accelerated corrosion protocols, and we build accelerated aging tests.

We provide industrial magnet warranties, but if you have issues, ask us! We will help.

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Why Pick Us?

We are good at making magnets! These are good in different industries.

• We make NdFeB magnets from start to finish.
• We have special papers (certifications) that show we are good.
• We can make special magnets, just for you!
• We are great at surface roughness control.
• We make customized neodymium magnets, and custom NdFeB magnets.
• We meet the requirements of automotive magnet standards, and aerospace certification. We can make them fast. We offer the full suite of *thermal spray techniques..

How to Buy Our Magnets

1. Tell us what you need.
2. We will look at your idea.
3. We will send you test magnets.
4. If you like them, we will make lots for you!

Ask us for a free idea and cost today!

Questions You Might Have