1. Process flow (suitable for automatic production line): sealing → curing → vibrating → feeding → ultrasonic degreasing → washing → washing → pickling → washing → washing → ash → washing → washing → activation → washing → washing → pre-Nickel plating→ bright nickel→ recycling→ washing→ water washing→ sealing→ water washing→ hot drying→ feeding→ drying
(1) Sealing: The powder-metallurgy Neodymium permanent magnet material has many pores, like the other powder materials. During the electroplating process, the solution penetrates into the pores and is difficult to clean, so that the Neodymium and the coating occur during use and storage. Lateral corrosion, the coating adhesion is reduced, the coating is bubbled, the skin is peeled, and the alloy material is powdered.
(2) Curing: In an oven, cure at 30 ° C for 30 ~ 40 min, or room temperature for more than 2 h.
(3) The vibrating light is vibrated at room temperature for more than 12 hours in the presence of abrasive and degreasing anti-rust corrosion inhibitor until a satisfactory metal surface is obtained.
(4) Ultrasonic degreasing porous powder metallurgy materials are easy to adhere to grease. In order to ensure the quality of the coating, it is necessary to strengthen the degreasing measures, and it is not suitable to discharge the oil. Of course, this process can also be omitted depending on the specific situation.
(5) Pickling: Pickling is a very critical step affecting the quality of the coating. Improper handling can cause corrosion and affect the plating quality.
The amount must be added to the corrosion inhibitor.
(6) Deashing: In addition to strontium iron, Neodymium alloy also contains a small amount of metal and non-metal components that are insoluble in acid. Therefore, ash is often produced after pickling. This gray-black substance is insoluble in common inorganic substances. Acid (such as HF, HCl, H2SO4, H3PO4, etc.).
(7) activation process;
(8) Pre-nickel plating process;
(9) Bright nickel process.
