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Powerful magnet surface treatment options

by:Maghard      2020-10-02
Ndfeb strong magnet chemical composition is a square crystal of neodymium, iron, boron, ndfeb sintered ndfeb and bonded ndfeb two kinds. Because of its element chemistry is live wave, easy oxidation in air, so the ndfeb permanent magnet materials must go through electroplating surface treatment before use. Prone to corrosion of sintered ndfeb permanent magnet materials, the reason for its surface treatment, should be carefully select the appropriate pretreatment and electroplating process. Sintered ndfeb permanent magnet materials before electroplating, must after chamfering, degreasing, pickling, ultrasonic cleaning and other can be stabilization clean the surface of the working procedure, for combination, low porosity, good corrosion resistance lasting coating. When choosing a plating process, should consider process of protective and production practicality, also must pay attention to electroplating emissions will be the effects on the environment and damage. The use of all the electric plating conditions are shown in table: coating category of Ni - post-processing code using the environment conditions Exposure to indoor condensation of atmospheric environment, may be produced and requirements to ensure the long-term stability of the appearance and intrinsic properties and long service life. ZnC1A used in slight corrosion condition, limited short-term pollution discoloration resistance corrosion resistance. Atmosphere of C2A used in harsh environments, such as organic corrosion CuNi - atmosphere Exposure to indoor condensation of atmospheric environment, may be produced and requirements to ensure the long-term stability of the appearance and intrinsic properties and long service life. NiSn - Appearance and good weldability, can be used for surface welding and electrical contact. NiAg - Appearance and good weldability, small contact resistance, surface discoloration resistance is poor, can be used for surface welding and electrical contact. NiAu - Decorative, the surface is not easy to change color, small contact resistance, high cost, high reliable electronic devices used for electrical contact and high-grade decoration. Chamfering small chamfer parts can be used in a centrifugal finishing equipment, large parts grinder can be used after grinding edge with spiral vibration or centrifugal vortex chamfering finishing equipment. Chamfer should be in neutral or weak alkaline medium, avoid by all means use chamfer containing acidic or corrosive medium. Oil removal should be done in neutral and weak alkaline except oil, to avoid oxidation and permeability of hydrogen, had better not to anode or cathode electrolytic process. Dilute nitric acid solution used for pickling pickling or weak organic acids for short periods of time, but should not be in a strong halogen acid pickling, avoid by all means in the high concentration of acid pickling, otherwise, the material surface coarsening and pulverization sharply. Ultrasonic cleaning should be done after each processing, and ultrasonic cleaning, to ensure that the cleaning effect and to prevent pollution of the next working procedure. Electroplating electroplating appropriate USES low corrosive solution, it is best to use a combination of multilayer coating to meet the actual requirements. Post-processing may, when necessary, so as to further improve the corrosion resistance. Dongguan magnet products co. , LTD. Company name: 86 0769 81313183 contact: Mr Mo mobile phone: 13826919856 sites: the true: 86, 0769, 81313568 address: China guangdong dongguan dongguan city based wangniudun town pier five chung industrial zone
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