Explore our specialized range of neodymium magnetic assemblies, customized with tailored protective surface coatings.
Your trusted partner in advanced, high-durability magnetic engineering since 1999.
Founded at the turn of the millennium, Zhejiang Laysun Magnetics Ltd. has evolved from a pioneering regional developer into a national high-tech enterprise at the forefront of rare earth magnet manufacturing. We specialize in the R&D, processing, and distribution of high-performance sintered NdFeB magnets, with a heavy emphasis on custom anti-corrosion materials designed for challenging operating environments.
Our expansive industrial plant covers 100,000 square meters in Suining, Sichuan, providing an annual production capacity of 5,000 tons. By merging raw material integration with advanced surface-treatment engineering, we deliver robust magnetic components that serve mission-critical applications globally.
Developing structural durability in high-performance permanent magnets requires advanced metallurgical engineering.
Sintered Neodymium-Iron-Boron (NdFeB) magnets are inherently vulnerable to atmospheric and chemical oxidation. The underlying structure consists of ferromagnetic Nd2Fe14B grains surrounded by a highly reactive, neodymium-rich grain boundary phase. When exposed to humidity, salt mist, or acid-base conditions, the Nd-rich phase undergoes rapid galvanic corrosion, leading to magnetic performance degradation and physical structural decay (known as crumbling).
To eliminate this threat, Zhejiang Laysun Magnetics utilizes a two-step protection program: raw-material optimization via Grain Boundary Diffusion (GBD) technology and physical surface coating isolation. These techniques significantly lower structural decay rates in challenging marine, automotive, and industrial applications.
A breakdown of specialized coatings designed to protect permanent neodymium magnets from degradation.
The standard choice for mechanical durability. Provides reliable protection in dry or lightly humid environments. Highly resistant to physical wear and handling abrasion.
SALT SPRAY: 24 - 48 HoursCreates a non-conductive polymeric layer. Ideal for high-humidity environments and applications involving mild chemical solvents or saline exposure.
SALT SPRAY: 96 - 500 HoursFluoropolymer coatings that offer dry-film lubrication, chemical resistance, and low friction. Ideal for dynamic wear and high-operating-temperature machinery.
SALT SPRAY: Up to 1000 HoursThick, molded protection that shields magnets against mechanical impact and direct fluid ingress. Popular for marine retrieval and delicate surface attachments.
HEAVY WATERPROOFING: IP68 RatingHow our high-durability magnets perform under demanding conditions across key global industries.
For subsea operations, oceanographic research equipment, and offshore wind turbine generators. Our rubber-coated pot magnets and Ni-Cu-Ni+Epoxy magnets resist salt spray, high pressure, and prolonged immersion in seawater.
For Electric Power Steering (EPS) motors, traction motors, and active suspension dampers. Our specialized high-temperature-coercivity magnets offer long-term resistance to oil, coolant, road salts, and vibration.
Used in seal-less magnetic drive pumps handling aggressive acids, alkalis, and solvents. Hermetically sealed encapsulation prevents chemical contact, protecting the raw magnet alloy from erosion.
Explore our main product groupings, manufactured to international engineering standards.
Direct integration from rare earth mining provinces to final surface plating.
Our strategically positioned manufacturing facility in Suining, Sichuan, provides direct access to domestic rare earth mining corridors. By sourcing Nd, Dy, and Tb locally, Zhejiang Laysun Magnetics is protected from raw material market fluctuations, offering stable pricing and consistent supply for our global partners.
From alloy melting and strip casting to hydrogen decrepitation, jet milling, sintering, and electroplating, all operations are managed under a unified quality control structure. This end-to-end integration reduces manufacturing times, minimizes material loss, and allows for rapid prototyping of customized shapes and coatings.
Our heavy-duty magnetic solutions are deployed across demanding industrial sectors worldwide.
Our magnets undergo rigorous validation to meet strict global specifications.
We operate in compliance with major global safety, quality, and environmental regulations. Our production facilities hold verified certifications for ISO 9001, ISO 14001, ISO 45001, and API standards, ensuring our products comply with RoHS and REACH requirements for sensitive industrial markets.
To verify corrosion performance, we run routine stress tests in our in-house laboratories, including:
Addressing the technical concerns of engineers and procurement teams sourcing long-life permanent magnets.
Industrial components designed for challenging material handling, mechanical, and automotive applications.
Laysun Magnetics