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The most commonly used coatings for NdFeB magnets are galvanized and nickel-plated. They have obvious differences in appearance, corrosion resistance, service life, price, etc. The following are the key points.
Polishing difference: Nickel plating is superior to galvanizing in polishing, and the appearance is brighter. Those with high requirements on product appearance generally choose nickel plating, while some magnets are not exposed, and generally galvanized with relatively low requirements on product appearance.
Differences in corrosion resistance: Zinc is an active metal and can react with acids, so its corrosion resistance is poor; after nickel plating surface treatment, its corrosion resistance is higher.
Appearance color comparison of several common magnet coatings
Difference in service life: Due to different corrosion resistance, the service life of galvanized is lower than that of nickel plating, mainly because the surface coating is easy to fall off after a long time of use, resulting in the oxidation of the magnet, thus affecting the magnetic performance.
Difference in hardness: Nickel plating is higher than galvanizing. During use, collisions can be avoided to a great extent, which makes NdFeB strong magnets fall off and break.
Price difference: Zinc plating is advantageous in this regard, and the prices are arranged from low to high as galvanized, nickel-plated, epoxy resin, etc.
Do you know which coating you want to choose after reading it? If you have any questions or need help, please communicate with us!
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