Al-Ni-Co magnet is an alloy composed of Al, Ni, Co, Fe and other trace metal elements. Compared with other types of magnets, AlNiCo magnet has the disadvantages of low coercivity and nonlinear demagnetization curve, while its advantages are high remanence and low temperature coefficient. In addition, another advantage of AlNiCo magnets is that they have good corrosion resistance and usually do not need a surface coating. But sometimes for the sake of beauty, Al-Ni-Co magnets are also surface treated.
coating
Al-Ni-Co magnet is famous for its excellent oxidation resistance and corrosion resistance, so it usually does not need protective coating, electroplating or other surface treatment. AlNiCo magnet has high corrosion resistance and will not corrode even if it is exposed to oil, solvent, gasoline and alcohol. However, as time goes by, Al-Ni-Co magnets may contain a small amount of iron, so if they are exposed to water, they are prone to surface corrosion. In addition, Al-Ni-Co magnets without surface treatment will show signs of corrosion over time when exposed to strong alkali solution and inorganic acid.
Although it is not widely considered necessary, the common coating of Al-Ni-Co magnets is paint, which usually makes them look better, because if there is no mechanical polishing, the original surface is dark gray. The chosen color is almost red! Similarly, Al-Ni-Co magnets can be easily coated with various metals, such as chromium or nickel.
Alnico magnets come in various shapes and sizes. All horseshoe magnets are made by Alnico. A horseshoe is a kind of bar magnet, and its shape makes the two poles on the same plane. The red horseshoe is the iconic image that everyone sees in their mind when they think of magnets.
adhesive
With proper adhesive, both magnetic and nonmagnetic materials can be bonded to other surfaces, and a clean and grease-free surface can provide the best bonding surface.
Al-Ni-Co magnet is a kind of high-quality magnet with excellent oxidation resistance and corrosion resistance, so in many cases, these magnets do not need any coating. However, if used in a specific environment.
Additional protection can be provided to prevent the surface of the magnet from oxidation or corrosion in a specific environment. In addition, the appearance of the magnet can be improved.
In addition, you mentioned that Al-Ni-Co magnets can be fixed with adhesive. Adhesives can fix magnets to various surfaces, regardless of whether these surfaces are magnetic or not. However, it should be noted that in order to ensure the best bonding effect, the bonding surface needs to be kept clean and free of grease.
Generally speaking, although Al-Ni-Co magnets have good corrosion resistance and oxidation resistance, in some cases, it is still necessary to carry out surface treatment or use adhesives. When doing these operations, appropriate steps should be followed to ensure the best results.