The Effect of Ultrasonic Frequency on the Deposition Speed of Electric Heating Tube Electroplating

The Effect of Ultrasonic Frequency on the Deposition Speed of Electric Heating Tube Electroplating

The Effect of Ultrasonic Frequency on Deposition Speed

The influence curve of 40kHz and 60kHz ultrasound on the chemical deposition rate of rare earth with different amounts of additives.

At the same rare earth dosage, the deposition rate under 40kHz ultrasound is higher than that under 60kHz. As the amount of rare earth elements added increases, the trend of sedimentation rate change is not obvious, that is, under the action of ultrasound, the addition of rare earth elements has a small impact on sedimentation rate. The rare earth element Ce has a large number of nuclear charges and strong adsorption ability, which can reduce the activity of metal ions such as diamond and nickel in the plating solution and increase the stability of the plating solution. The following experiments were conducted using an ultrasonic frequency of 40kHz and a sound intensity of 0.15W/cm'o

2.4 Effect of concentration of main salt substance f on sedimentation rate

The influence curve of the mass concentration of the main salt on the chemical deposition rate.

The main salt is CoC12.6HZO and NiC12.6H20, with a mass ratio of 7:3. From the figure, it can be seen that the sedimentation rate is very small when there is less main salt added, and rapidly increases with the increase of main salt mass concentration. The complexing agent forms a complex with metal ions, which promotes the dissociation equilibrium of metal ions as the mass concentration of the main salt increases [3]. Therefore, when the mass concentration of the main salt increases to a certain value, the deposition rate tends to stabilize. At this point, the maximum chemical deposition rate without ultrasound is about 6mg/(cm '· h); The maximum deposition rate under ultrasonic conditions is about 8mg/(cm '"h), which means that the deposition rate increases by up to 30Yo. It can be observed that the optimal ranges for COC12.6H, O, and NiC12.6H30 in ultrasonic chemical deposition are 9.4 ^ -11.7g/L and 3.5-5.0g/L, respectively.

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