Neodymium magnets, also known as rare earth magnets, are popular magnetic materials for various industrial and consumer applications due to their high magnetic strength and durability. These magnets are composed of neodymium, iron, and boron, making them vulnerable to corrosion, particularly when exposed to moisture and humid environments. This leads to the question, can neodymium magnets rust? Expertise in the field of magnetism shows that neodymium magnets are highly susceptible to corrosion due to their chemical composition. These magnets have a low resistance to oxidation, leading to rusting when exposed to air, moisture, saltwater, and acidic solutions. Therefore, it is essential to protect these magnets from rusting to ensure their longevity and reliability in applications. Experience with neodymium magnets also indicates that rusting can affect the magnet's strength and performance. When a portion of the magnet surface rusts, it becomes rough and porous, leading to a reduction in magnetic strength as it cannot hold a strong magnetic field over the porous section. Consequently, this reduces the effectiveness of the magnet's function in various industrial and consumer applications. Authoritativeness on the topic shows that there are several ways to prevent neodymium magnets from rusting. Firstly, coating the magnets with a corrosion-resistant material, such as nickel, zinc, or chromium, creates a barrier between the magnet and its environment, preventing rusting. Additionally, storing the magnets in a dry and moisture-free environment, away from humid environments such as bathrooms and water sources, minimizes their exposure to rusting conditions. It is also important to note that the application's environment determines the magnet's susceptibility to rusting. Industrial applications exposed to harsh environments require stronger corrosion-resistant coatings, while consumer applications that seldom come into contact with water require light coatings or no coating at all. In conclusion, neodymium magnets can rust, and thus, adequate measures are necessary to protect their longevity, performance, and effectiveness in different applications. Therefore, understanding their vulnerability to rusting is critical in choosing the appropriate coatings and storage measures for the magnets, depending on the application's environment.