Magnets have been around for such a long time. Magnets are widely used not only for house applications but also for businesses. We can easily find the parts of magnets in our everyday devices, including mobile phones, hard disk drives, etc.
While magnets can provide a lot of benefits, you may need to know one thing: the power of electromagnetics decreases over time. If not carefully maintained, the magnets won't function properly.
Thus, several measures must be taken to increase a magnet's strength. This article will explain how.
Magnetizing a Magnet
As you may know already, magnets have magnetic properties in them. Over time, the amount of magnetic properties will decrease even faster when used periodically. The reason why the magnets won't have the magnetic force is because the molecules are scattered.
In this state, the magnets won't have enough force to function properly. Therefore, we need to magnetize the magnets again to bring the strong magnetic field back. During the magnetization process, the molecules will line up in the same directions, which brings us to the two poles: North and South. Normally, these poles have the same amount of magnetic strength.
Have you ever wondered why magnets are attracted to each other? It's because the group of particles is pulling the force together. The atoms and molecules in the North Pole will attract the ones in the South and vice versa.
If you try to connect magnets in the same direction (Poles), they will repel instead of pull. This is because the particles are pushing each other.
Learning how magnetism works may help you understand what to do when the strength of magnets becomes weak over time.
Another thing you need to know is the magnet materials may determine how powerful the magnetic force is. For example, the Neodymium magnets are generally more powerful because they have more packed domains which create a stronger magnetic field.
Permanent Magnets Vs. Electromagnets
Before we get into the methods to increase the strength of the magnet, let us explain about the permanent and electromagnets.
There are permanent magnets, like Sm-Co magnets and Nd-Fe-B magnets that you can recharge to make the magnetic power stronger. This type of magnet is rechargeable using the stronger magnets.
Another type of magnet is an electromagnet. To recharge them, you may use the electric current. As long as the current flows, the magnets will be powered. However, when the current is off, the magnetism may disappear.
In the worst scenario, your magnets may appear weak at all times. It can't be recharged using an electric current or a stronger magnet. If that's the case, it would be better to discard them and replace them with new ones. Check out our website to find the magnets that suit your needs the best.
Is it Possible to Remagnitize Weak Magnets?
The reason magnets can lose their strength may vary. For example, they are exposed to high temperatures for a significant amount of time, exposed to physical impact, poor storage, and corrosion. Knowing what caused your magnets to be weakened may help in finding suitable solutions.
To some extent, weak magnets can be magnetized again. If the magnets still show a faint strength, various methods may be suitable to bring back the power, including cleaning, re-adding the materials, recoating, remagnetization, and thermal treatment.
However, know that the success rate highly depends on the magnet's condition, remaining power, and composition.
Additionally, the type of magnet also defines the effectiveness of the restoration process. The permanent magnets, like what we have mentioned before, may have a better success rate of restoration. On the other hand, it's possible to do the methods in electromagnets but only with less chance of success.
How to Increase the Strength of a Magnet
There are ways you can do to strengthen the magnets. Read the following techniques for more info:
1. Cleaning the Surface
The easiest method to make the magnets stronger is cleaning their surface. While it may sound simple, cleaning the magnets regularly is essential to restore the strength of weakened magnets.
Over time, magnets can accumulate debris, dust, and oxidation during use and storage. These materials may cover the surface of the magnets, which results in a weakened magnetic force.
So, it's better to clean the magnets' surface regularly to ensure the optimal function. You may begin the cleaning process by gently wiping the surface using a tissue or soft cloth. If the dirt remains, soap and detergent may be the best cleaning solutions for the magnets. After the cleaning process, ensure to completely dry the magnets before use.
2. Remagnetization
Remagnetization is one of the most effective processes for making magnets stronger. The process involves putting the weakened magnets inside a stronger magnetic field to bring back their magnetic strength. Once exposed, the magnetic domains will be realigned again, thus making the magnets stronger.
To begin the remagnetization process, you may start using a permanent magnet. The permanent magnets are better than electromagnets as they are stronger. The process itself is rather simple.
All you need to do is to connect the weakened magnets to the permanent magnets. Slowly move the magnets in a line towards the permanent magnets. It may take several repeats to bring the magnetic strength back. To know when to stop, you may test the weakened magnets during the process.
3. Ensure Suitable Magnets Storage
Storage plays a huge role in keeping the magnets' in prime condition. The poor storage may result in weakened magnetic force, and the condition may worsen if nothing changes. Prevent to store the magnets in high-temperature spaces or near a strong magnetic field when not in use.
Although the magnets will lose their magnetization over time, the above conditions may worsen their life span. So, make sure to keep the magnets in a safe and cool space. Keep the magnets away from the sun's heat and other electromagnetic devices.
Another thing you can do is to use the magnet keepers for each of your magnets. Additionally, you may also store the magnets together with the poles facing opposing directions. That way, the risk of magnetic field leakage can be minimized.
4. Coating
Coating is another process that may help in restoring the strength of weakened magnets. The process will add another material for protection as well as improve its magnetic strength. Once properly covered, the magnets will have better magnetism and durability.
Usually, the coating material is polymer or epoxy resin. The process involves carefully applying the thin layer on the magnet's surface. Before using, it's advised to leave the coating to dry first for some time.
5. Thermal Treatment
The magnet's strength can also be restored through thermal treatment. The weak magnets can be exposed to a high temperature and then rapidly cooled to make their magnetic domains aligned again. The process may take a while until the strength is fully back.
In thermal treatment, you need to understand the limit of exposed temperature. It's important because the extreme heat in higher temperatures may instead break the magnets completely. The damage is irreversible.
If you want to approach the thermal treatment to bring back your weak magnets, it's really important to understand the basics and cautions. It's even better to contact professional help as they are more used to this method and have enough skills and equipment to do it.
6. Sandwiching Magnets Between Metal Plates
The last but not the least is adding the backing material. Adding the material to a weak magnet can significantly make it stronger again. The process is putting the magnet between two metal plates. The metal can be steel or iron, which then makes the magnetic flux line more reinforced.
What you can achieve from this process is a stronger magnetic force from the magnets. So, if you want to do a relatively safe but effective method, magnetic backing is recommended.
FAQS
Is It possible to restore the strength of magnets?
Yes, using the appropriate techniques, it's highly possible to restore the strength of weakened magnets. However, the success rate may differ based on several aspects, including the magnet's condition, type, and level of demagnetization. It's highly advised to approach the safe methods first before going to the more complex ones.
What are the causes of demagnetization?
Magnets can eventually lose their magnetic strength because of several factors, including exposure to direct sunlight or other sources of high temperatures, exposure to stronger magnetic fields when not in use, corrosion, aging, impact, and poor storage. Understanding what caused your magnets to demagnetize is important to find a proper way to restore it.
When is the best time to replace the weak magnets?
A magnet that's too broken or weakened may have a very slim chance of survival. The restoring methods cannot be effective when used on a magnet in such a state. If the processes fail to bring back the magnet's strength, that's when you need to replace it for good.
Conclusion
It is normal to have magnets demagnetized over time. When used regularly, the magnet strength may even deteriorate quickly. However, there's always a way to give their strength back by good maintenance and restoration processes.
By following our guide, you may have a chance to bring back the strength to your weak magnets. The magnets will be reinforced and have the function that was previously missing. If done properly, the techniques may even extend the magnets' lifespan.
To maintain your magnets and increase their strength of a magnet, do remember to regularly clean the surface, store the magnets in a suitable space, and apply thermal treatment when needed. Ask for professional guidance when things get out of hand.
