How to detect the magnetic coating quality?

Owing to the poor corrosion resistance of Nd-Fe-B magnet, so generally a plating to enhance the corrosion resistance and most of the magnet manufacturers are outward to electroplating factory electroplating processing, then electroplating, OK, coating quality is how to detect? Testing which?

How to detect the coating quality?

The coating quality directly affects the service life of the Nd Fe B, and the main method for the detection of the quality of the coating:

1, visual appearance

Appearance mainly through the naked eye observation, in the natural light (sunlight, non direct) under the best, or in the light of the equivalent of 40W under the fluorescent light. Should not be blistering, peeling, partial plating and uneven color, stains, water stains, etc..

2, coating thickness measurement

3, drop test (mainly for galvanized products)

4, zoned test (generally used for nickel products)

5, the heat shock test

6, PCT pressure test

7, SST salt spray test

8, constant temperature and humidity test etc.

Guess your attention: what is the problem of the lack of angle after the magnet plating?

1, the chamfer is not big enough

2, the specifications are too large

3, the speed is too fast for each bump

4, the material has the problem, too brittle.

At present, the main coating technology are: galvanized, nickel plated, nickel plated copper nickel, gold plating, silver plating, nickel plated black nickel, zinc plating, chrome plating, zinc plating.

How long does it take to electroplating time?

This is not specific, it is generally used to see what products customers it, and if you need to have a salt fog test, if you want to have a salt fog will be plating for a long time, there is no requirement is 3-4 hours!