Common coating of magnet 】
Magnets coated first is for the magnet special working environment.
For example: motor magnets, in addition to the iron bar work environment are wet, so the requirements for surface coating processing.
Now magnet first plating skills include: zinc, color zinc plating, nickel plating, black nickel plating, nickel plating copper, nickel, gold-plated, silver plated, coated with epoxy resin.
Ndfeb magnet surface coating processing, in terms of the use of product features and preservation is often different plating processing, the most common electroplating technology is galvanized, nickel plating.
Each plating surface color is not the same.
All have their own defects.
Galvanized: surface is silvery white, look to do 12 & ndash;
48 hours salt fog, can be applied in some glue adhesive, (
Such as AB glue)
Such as electroplating good can register for two years to five years, its advantage is the price is low.
Black zinc plated, is based on customer requirements to product surface treatment it into black, first in terms of plating process is on the basis of galvanized maintained by chemical treatment to add a layer of black film, the film can also play a role in maintaining the products use, salt fog growth time, extended by oxidation time.
But surface scratches easily, bereft of its maintenance.
Nickel plating: seemingly luster, stainless steel surface are difficult to oxidation in the air, and nice appearance, good gloss, electroplating May 12 & ndash;
72 hours salt spray test.
Its defect is cannot meet the use and some glue, such meetings make coating, accelerate the oxidation, now in the market for nickel - more
Nickel, this way of electroplating for 120 & ndash;
200 hours salt spray, but the plating cost is relatively higher.
Gold-plated silver: used in magnetic jewelry, magnetic jewelry are gold and silver in the majority.
Gold-plated magnet surface looks like gold is very beautiful, same more commonly used in hand act the role of industry, our products can be gold-plated, used for magnetic bracelet.
Plating: epoxy resin is a magnet in nickel plating and then add a layer of resin paint in the outside, its biggest advantage is can extend the salt spray test time.
Chromium plating, chrome plating are relatively rare, generally thought that the chrome plating process has strong corrosion resistance is very difficult to reaction with other substances.
Generally applied in more severe ph strong working environment.
Its capital is high, electroplating general company can't accept, therefore, very few people choose.
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