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Because of the poor corrosion resistance of ndfeb magnets, it is generally necessary to have plating corrosion. So, the question is, what should I do with the magnet?

What works best?

What is the best effect on the surface plating of ndfeb coating? First of all, we should know which of the nd-feb can be plated.

"How about a gold jade?

What are the common coating of ndfeb magnets?

The nd-nd-ferroboron magnet is coated with nickel, copper, chrome, gold, black zinc, blue white zinc, epoxy resin etc.

Electroplating is different, the color of the magnetic surface of the magnet will also differ, the preservation time also has long and jangdan.

NI, ZN, epoxy resin: the effects of NI, ZN, epoxy resin, par-c coating on magnetic energy in three solutions were studied.

Macromolecular material > epoxy resin > NI coating > ZN coating

The results showed that in the acid, alkali and salt environment, the coating of high polymer materials had the best protection effect on the magnets, while the epoxy resin was relatively poor, and the NI coating was inferior and the ZN coating was relatively poor.

Salt mist tester

Zinc: the surface appears to be silver and white, but it can be used for 12-48 hours of salt fog. It can be used with some glue, such as AB glue, for two to five years.

"How about a gold plated?"

Galvanized nd-nd-fe-boron magnet products

Nickel: it looks like a stainless steel color. It is difficult to oxidize the surface in the air, and the appearance is good, the gloss is good, the plating can pass 12 -- 72 hours salt mist test.

Its disadvantage is that it cannot be used with some glue, which will cause the coating to fall off.

Advantage: appearance good-looking

Disadvantages: the coating is easy to fall off

Copper: many appear in the hardware industry, the nd-feb industry is very few people use, its appearance is yellow.

Rarely used

Yellow appearance

Chromium: chromium plating industry is also relatively rare, its plating cost is very high, the general company cannot accept.

But it has a very strong decay ability and it's very difficult to react with other substances. Mainly used in places where the acid alkalinity is stronger.

This is rarely chosen.

Very rare

Black zinc: surface treatment is according to the customer request the product as black, in the electroplating process is mainly on the basis of galvanized by chemical treatment to add a layer of protective film, black also can protect the membrane products do use, salt fog growth time, prolonged by oxidation. But its surface is easy to be scratched, lose its protective effect.

The people who use it now are rare, mostly replaced by resin.

In black

Probably replaced by resin

King: the yellow gold hand ornaments that we see on the street are mostly gold plated or copper.

Gilding makes the product look as beautiful as gold. It is commonly used in the jewelry industry. Our products can also be plated with gold and used in magnetic jewelry.

Make magnetic jewelry

Epoxy resin: the product is in nickel plating and then add a layer of resin paint, outside the industry in the past two years have a market, its development is very fast, a lot of people are now used in all kinds of plating products, its biggest advantage is that can do the color you want.

Pros: all kinds of colors

PS: the appropriate coating should be selected based on the unused environment.

Not the manufacturer of the plating is not the same, the main reason is the chamfer and the length of the plating time, under the condition of without knowing the magnet electroplating, we should be how to distinguish the plating quality, there are one of the most simple and quick way is to see coating, coating quality is better, the brighter the said so in choosing a magnet when ordering, as far as possible choose industry more awareness of enterprises in order to guarantee the quality of the coating.