Study On Preparation And Properties Of Electrodeposited Ni-W-P Alloy Film In The Stabilized Magnetic Field

The application of electromagnetic filed in material science and preparation filed becomes an important research direction and the hotspot in the world. It has distinguishable advantages comparing to other methods of material processing. Electromagnetic filed has high energy density and can be easily controlled; it also can transfer heat energy and kinetic energy to materials without pollution. So, the application of electromagnetic filed can proffer a clean and novel method in material processing. A new method for plating film is put on electroplating with electromagnetic filed. This paper studies the effects of electromagnetic filed on electroplating Ni-W-P alloy. The deposit of Ni-W-P alloy has broad appliance prospects because of its high corrosion resistance and hardness, good wearing resistance and heat stability. Therefore it is theoretical and realistic to do researches on applying steady magnetic filed to the process of electroplating Ni-W-P alloy.Through applying a mangnetic field (0-1.5T magnetic flux density), which is parallel (B //J) or perpendicular (B(?) J) to the electric field, this paper studies the effects of electromangnetic field in electroplating Ni-W-P alloy on pure copper and Q235A steel. The field include current efficiency, deposition rate and corrosion resistance of the coating alloying component, microhardness; observing the micro-morphology of the coating with SEM and metallographic microscope; analyzing the diffraction of the deposits with X-rate. The rule of the effect on performance indexes Ni-W-P alloy were obtained by analyzing the experiment data.From the results, it was shown that:comparing to the coating without magnetic field, the coating in magnetic field becomes more homogeneous and more smooth; but the content of Ni increases, the deposition of W is inhibited, and the content of P remains basically unchanged; the microhardness increases; amorphism extent becomes better; corrosion resistance increases; but the total current efficiency and deposition rate of electroplating Ni-W-P alloy decrease.