banner
Home » Knowledge » Content
Product Categories

What is the effect of strip speed on plating thickness?How to adjust?

- Jan 19, 2019 -

What is the effect of strip speed on plating thickness?How to adjust?

Generally speaking, when other factors remain unchanged, the thickness of zinc layer increases with the increase of strip speed.The main reason is that the speed of the strip is fast and the zinc liquid is much.And bring out of the zinc pot too late to return to the cause of being taken away.Therefore, in production practice, in order to obtain the same coating thickness, it is necessary to increase the pressure of the air knife when increasing the speed, and vice versa.

Effect of distance between nozzle and strip on coating thickness?How to adjust?

Generally speaking, the greater the distance between the nozzle and the strip, the thicker the zinc layer will be under the condition that all other factors remain unchanged.Because when the distance between the nozzle and the strip is larger, the pressure of the flow is lower, so the impulse is smaller, which will cause coating thickening.In the production practice, the actual working range of the nozzle from the strip is between 15~30mm. In order to save the spray energy, it is hoped that the nozzle and the strip can keep the closest distance, and the adjustment of the distance mainly depends on the shape of the plate.

What is the effect of the height of the nozzle from the zinc level on the coating thickness?

How to adjust?If the zinc is still in the liquid state, the height of the nozzle from the liquid level has virtually no effect on the coating thickness.In actual production, the working range of nozzle height is between 70 mm and 360mm.The adjustment of the nozzle height mainly depends on the nozzle pressure and the strip steel speed. When the nozzle pressure and the strip steel speed are high, the nozzle height must be increased; otherwise, the strong airflow will pressure the zinc liquid surface and make the zinc liquid splash, which will easily lead to the nozzle blockage.If the strip speed is low, and the required coating is thick, then the blowing pressure is small, you can reduce the nozzle height.In summary, to save energy, the height of the nozzle should be kept as low as possible.