Neodymium-magneetplaten en coatingopties

Hieronder volgt een lijst en beschrijving van beschikbare coatingopties voor op maat gemaakte magneten. Opmerking: Magneten kunnen alleen vóór magnetisatie worden gegalvaniseerd. als de beplating wordt aangetast na magnetisatie door schuren of opzettelijke machinale bewerking, kunnen ze niet opnieuw worden geplateerd. Sommige coatings, zoals plastic, kunnen na magnetisatie worden aangebracht, Als het proces de maximale bedrijfstemperatuur van de magneet niet overschrijdt.

Waarom moeten magneten worden geplateerd??Oxidatie (roest)NdFeB-magneten zullen oxideren(roest) indien blootgesteld gelaten. Wanneer een beplating verslijt of barst, het blootgestelde gebied zal oxideren. Een geoxideerd gebied zal niet resulteren in volledige degradatie van de magneet, alleen het geoxideerde gebied verliest zijn kracht. However the magnet will lose some structural integrity and become more susceptible to breakage.DurabilityDepending on shape, permanent magnet substrate is brittle. A multilayered metal plating like nickel or zinc improves the magnets resistance to chipping and wear, particularly around corners.Harsh Environments. Platings vary in their tolerance of different harsh chemicals and abrasion. Salt and humidity in regions near the ocean are commonly overlooked when selecting a plating. Be sure to consider the magnets environment when selecting a plating.The most common type of plating for neodymium magnets Nickel (Ni-cu-ni) Intended for indoor use. It has proven to be very resilient when subjected to normal wear and tear. However it will corrode oudoors in prolonged exposure to salt water, salty air, or harsh chemicals.

Beplating \ Coating	Appearance	Indoor Use	Abrasion (Wear)	Humidity	Water	Salty Air (Near Ocean)	Salt Water	Dikte	Prijs
Nikkel (Ni-cu-ni)A very durable multilayer combination of nickel, koper, nikkel. The most common plating.		Excellent	Good	Good	Bad	Bad	Bad	10-20 Microns	Low
Zinc Plating (Zn)2nd most common plating, Zinc is a standalone plating with only one layer. It is a self- sacrificing coating, meaning when the material corrodes the outside turns white creating a durable layer of protection.		Excellent	Excellent	Excellent	Good	Good	Bad	8-10 Microns	Low
Epoxy (Ni-Cu-Be)Epoxy plating is multilayered in Nickel, Copper, Epoxy. Great for outdoor applications. However it is not very abrasion resistant and prone to scratching.		Superior	Bad	Superior	Superior	Excellent	Excellent	15-25 Microns	Medium
Goud (Ni-Cu-Au)Well known for its corrosion resistance. Layered in Nickel, Copper & Gold on top. Works very well in water applications. The gold layer is very thin and adds only a few cents per magnet.		Superior	Good	Superior	Superior	Superior	Superior	10-20 Microns	High
PlasticPlastic is the most corrosion resistant. However its is thicker than other platings. A mold is required to create the plastic shell.		Superior	Superior	Superior	Superior	Superior	Superior	250-500 Microns	Medium
PhosphatePhosphate is a temporary coating that will last only a few months. It is normally used when the magnet is going to be over-molded or encased in a plastic part that will act as the final protective layer.		Good (Temp)	Bad	Bad	Bad	Bad	Bad	1-2 Microns	Low