Magnet coating treatment is primarily designed to accommodate magnets’ special working environments. For instance, magnets used in motors and magnetic bars for iron separators operate in highly humid conditions, so surface coating treatment is mandatory. At present, mainstream magnet coating technologies include galvanizing, color zinc plating, nickel plating, black nickel plating, nickel-copper-nickel plating, gold plating, silver plating, and epoxy resin coating.

  Zinc Plating (White Zinc / Black Zinc)

 •  Characteristics  

Good corrosion resistance: Zinc forms a dense oxide film in air, effectively preventing magnet rust and providing reliable protection under general atmospheric conditions.

Low cost: The galvanizing process is relatively simple with low raw material costs, making it a cost-effective surface treatment option.

Diverse appearances: Different post-treatment processes can produce various finishes such as white and iridescent color.

 •  Applicable Industries & Products  

Daily necessities: Fridge magnets, stationery and other goods that require moderate corrosion resistance while being cost-sensitive. Galvanizing delivers basic anti-rust performance at a controlled cost.General mechanical components: Ordinary magnets in standard motors and relays with low to medium corrosion resistance requirements.

   （Nickel Plating）

 •  Characteristics  

Superior corrosion & wear resistance: Nickel layers resist erosion from acids, alkalis and other chemicals, and feature high hardness to prevent surface scratches during use.

Bright, aesthetic finish: Nickel-plated magnets have smooth, lustrous surfaces with excellent decorative effects that elevate overall product appearance.

Good solderability: Facilitates welding between magnets and other metal components, improving assembly performance.

•  Electronic devices: Small magnets inside mobile phones, computers and other electronics. Nickel plating shields magnets from internal electronic corrosion while meeting appearance and soldering standards.

Medical devices: Magnets for MRI and other medical equipment. Nickel plating stabilizes magnet performance in complex operating environments, and its smooth bright surface meets medical hygiene standards.

Decorative goods: Jewelry, handicrafts and ornaments, where nickel plating balances visual appeal and corrosion resistance.

   （Copper Plating） 

•  Characteristics  Excellent electrical & thermal conductivity: Copper drastically boosts magnet heat dissipation and conductive performance.

 Moderate corrosion resistance: Copper layers offer basic protection for magnets under mild operating conditions.Good workability: Soft copper coating allows easy post-processing and modification.

•  Electrical equipment: Transformers, motors and related hardware. Copper plating reduces resistance and energy loss via enhanced conductivity, while outstanding thermal conductivity stabilizes equipment operation and extends service life.

Communications industry: High-frequency magnets in communication hardware, where copper plating optimizes conductivity to boost signal transmission efficiency and quality.

     （Chromium Plating） 

•  Characteristics  

Ultra-high hardness & wear resistance: Hard chromium layers strongly resist abrasion and scratches, extending magnet service life.

Outstanding corrosion resistance: Chromium withstands harsh chemical environments to protect magnet substrates from erosion.

Mirror-like glossy finish: Delivers premium decorative aesthetics for high-end product design.

•  Applicable Industries & Products  

Automotive industry: Magnets fitted to engine and transmission parts. Chromium plating handles complex road and environmental conditions with robust wear and corrosion resistance. It also upgrades interior aesthetic quality for decorative automotive magnetic parts.

Hardware products: Door handles, locks and similar hardware embedded with magnets. Chromium plating delivers long-term durability alongside premium visual appeal to satisfy dual consumer demands for quality and appearance.

（Black Zinc Plating） 

•  Characteristics  

Unique matte black finish: Deep, solemn black tone delivers distinctive visual effects and high decorative value.

Standard corrosion resistance with upgrades: Retains the basic anti-rust properties of regular zinc plating, while specialized passivation treatment further elevates salt spray and corrosion resistance.

•  Applicable Industries & Products  

Consumer electronic exterior parts: Magnets integrated into mobile and tablet housings. Matte black zinc plating unifies with product design to enhance tech and fashion aesthetics.

Decorative handicrafts: Antique and retro-style artworks, where the dark black coating creates unique artistic atmospheres and boosts ornamental value.

     （Gold Plating） 

•  Characteristics  

Extreme corrosion & oxidation resistance: Gold boasts chemically inert properties and barely reacts with any chemical substances, providing robust protection against oxidation and erosion in extreme harsh environments.

Luxurious golden luster: Distinctive golden finish delivers unrivaled premium decorative effects.

•  Applicable Industries & Products  

High-end jewelry: Gold-plated magnets paired with precious gemstones and metals elevate jewelry grade and value, maintaining flawless appearance through long-term wear thanks to exceptional anti-tarnish performance.

Precision instruments: High-precision aerospace sensors, top-tier scientific research equipment and other precision hardware. Gold plating guarantees consistent stable magnet performance amid complex extreme operating conditions.

  （Black Epoxy Coating）

•  Characteristics  

•  Superior protective performance: Resists acids, alkalis and salt spray erosion to fully prevent magnet rusting.

•  High temperature resistance: Withstands temperatures up to 380°C.  

•  Excellent insulation: Prevents short circuits and electrochemical reactions between components.

•  Attractive uniform finish: Smooth black surface with clear identification properties.  

•  Optimized mechanical properties: Wear-resistant, pressure-resistant and impact-resistant; coating thickness ranges from 10 to 25 μm.  

•  Suitable for electronics, automotive, machinery manufacturing, medical devices, toys, aerospace and other sectors. Widely applied to speakers, sensors, motors, fixtures, magnetic adsorption devices and other products.

   （Electrophoretic Coated Round Discs） 

•  Characteristics  

•  Reliable protection: Coatings formed via electrophoresis fully isolate corrosive media, delivering strong anti-rust and anti-oxidation performance.

•  Electrical insulation: Avoids short circuits and electrochemical reactions between magnets and mating parts.

•  Uniform appearance: Consistent coating thickness with smooth flat surfaces; customizable color options for decoration and marking.

 •  Strong adhesion: Tightly bonded to magnet substrates, resisting peeling and sustaining long-term protective performance.

  ◦  Applicable to all magnetic components in electronics, automotive, machinery manufacturing, medical devices, aerospace and other industries, including hard disk drives, motors, sensors, MRI equipment, navigation systems, etc.