How to deal with magnets plating problem 】
Choose after ultrasonic cleaning, neodymium - iron - boron pretreatment technology of magnetic materials is commonly: (
Alkaline degreasing - water - water - ultrasonic fine drift - dilute nitric acid treatment (
-- water rinse -- rinse -- ultrasonic fine bleaching, activation treatment, electroplating,
Alkaline degreasing -- water rinse -- rinse -- ultrasonic fine drift - dilute nitric acid (
Processing -- water rinse -- rinse -- ultrasonic fine drift, activation treatment, water rinse -- rinse, ultrasonic fine drift - plating (
Ultrasonic alkaline degreasing -- water rinse -- rinse -- ultrasonic fine drift - dilute nitric acid (
Processing -- water rinse -- rinse -- ultrasonic fine drift, activation treatment, water rinse -- rinse, ultrasonic fine drift - magnet electroplating electroplating processing problem analysis is as follows: after ndfeb magnetic material is the screening of praseodymium, neodymium, iron, boron ultrafine powder through mixing, pressing and sintering.
According to the requirements of product use, mechanical processing into various shapes.
Because ndfeb material chemistry is vivid, susceptible to oxidation, so the demand of the finished product on plating coating processing.
However, electroplating coating quality is closely related with its pretreatment.
This pretreatment process generally consists of degreasing, rust, such as activation process.
If this pretreatment process has a link do not clean, will bring all of electroplating products latent faults, the plating present foaming, fall off and other issues.
Disadvantages of magnetic material parts will lose market sales value and scrap.
If with the drawback of the concealment of the magnetic data once parts are applied to the device, may because of the unqualified parts, computer and form the whole machine.
Even form a serious consequences.
Ndfeb magnetic material is not as dense as forging metal materials.
Information is a micro groove.
The porous bring many difficulties and trouble processing before plating.
In addition to remove artifacts appearance of alkaline, acid and processing process into dirt, the biggest difficulty is that how to clear out dirt from the pores.
About the general requirement is not high level low magnetic material, choose the pretreatment process for ever: alkaline degreasing, water washing, acid treatment (
Activation - water - appearance - plating.
This technological process is simple, but it is higher, to the requirement of degreasing agent demand in neodymium - iron - boron dedicated to oil degreasing agent, the degreasing degreasing agent formula is complex, the demand variety of raw materials, user manufacturing process is very time-consuming.
And if the ratio of improper, will failure, poor practicability.
Since the industrial production of high-power ultrasonic cleaning machine available, this problem is easy to solve.
Ultrasonic cleaning advantaged cavitation effect can make the residual in the magnetic material microporous get more thoroughly remove alkali and acid.
Strong magnets, magnets, magnet, magnet, ndfeb magnet, rare earth permanent magnets