What you are looking at here is a phosphated NdFeB rectangular magnet block. Phosphating is used to prevent oxidation and corrosion by forming a layer of insoluble phosphate film on the magnet surface. This film layer not only blocks the intrusion of external water vapor and oxygen, but also improves the adhesion of subsequent coatings or plating.
If you need to customize, please contact our customer service, explaining the size, grade, quantity, plating layer, tolerance requirements, magnetization direction and so on. We will customize the production according to your requirements.
Learn more about neodymium magnet coatings: https://www.couragemagnet.com/neodymium-magnet-coating/