Parylene Coating For Magnets

1) Non-Porous Parylene

the covering is composed of thin polymer layers containing active small molecules that “grow” on the surfaces of objects. Because they are formed under vacuum conditions, they can be applied to various shapes, including sharp edges, cracks, and internal surfaces.

2) Totally Pinhole-Free

Heating and melting of xylene cyclo dimers are followed by high-temperature breaking into free gas phase molecules, which are immediately deposited onto the substrate under vacuum and room temperature circumstances to polymerize into a film, creating a very impermeable protective layer.

Because perylene coating contains no solvents, it overcomes the flaws of previous solvent-based coatings, which unavoidably left many small pinholes due to solvent loss during the curing process. This feature ensures that the covering coating has no pinholes.

This property benefits neodymium magnets whose uses require direct interaction with different moistures and liquids. One typical example is a countersunk neodymium magnet used for closing within industrial valves. You don’t have to worry about something leaking inside and damaging the neodymium magnets.

3). Independent Security

Points And Overall Security
Experiment after experiment revealed that each point of the Parylene coating is an independent protection point. When the covering of a specific location is harmed, the neighboring regions of the coating are unaffected. At the same time, the ends of the coating layer are chemically bonded together, providing uniform and enhanced defensive performance.

4) Adequate Ventilation

In addition to these inherent properties, Parylene-based coating has good electrical properties, good power-saving properties (low dielectric loss and high dielectric strength), and excellent mechanical properties (high mechanical strength and low coefficient of friction), making Parylene a suitable insulating layer for small wound components. The high dielectric strength and dry film lubricity of perylene make it ideal for this application.

5). Spiral Viewing Room

The thin and consistent layer of the Parylene covering enables the winding device to keep a reasonably sizeable winding window. The large winding area that results permits it to be used as a covered product with improved performance—coated goods.

Parylene is also used for components that would be “inclusions” in conventional materials and for small ferrite transformers and voltages. Parylene does not suffer from magnetostriction or permeability issues, unlike traditional impregnation methods.

Winding apertures are critical for tiny moveable and rotor assemblies, and coating bonded nickel-iron laminated components with urethane or PTFE materials is typically challenging. Because of the complicated form and coating material that will remain in the tiny winding opening and the coating with very little surface tension that will stay on the pointed exterior edges will cause significant friction when winding. Whereas regular and constant Parylene maintains these tiny window openings while ensuring adequate covering thickness on the outer edges to provide wind protection.

6). Excellent Tiny Magnet Plating

Insulating between the coil and the metal component with tape is conventional; however, using video is challenging when the part is very tiny. Covering with Parylene can help remove faulty components while improving their electrical characteristics. An example is the small cylindrical core used in some hearing aids as a “Pick-Up” coil.

7). Increased Power and Resilience to Erosion

New advancements in magnetic materials have created sintered and cemented NdFeB components that can be produced in tiny forms and have exceptional benefits when using the Parylene covering method. Small NdFeB magnetic devices are brittle, and adding a Parylene coating improves their strength. The NdFeB substance is also susceptible to rust from atmospheric moisture, and Parylene’s meager water vapor transfer rate offers excellent moisture and corrosion protection.