At present, there are many choices of cleaning agents suitable for ultrasonic cleaning in the market. From the impact of the properties of cleaning agents on ultrasonic cleaning, the following aspects can be considered when selecting ultrasonic cleaning agents:

1、工件材質及污垢性質

1. Workpiece material and dirt properties

針對不同的污垢選擇其專用的清洗劑，例如，油脂的清洗用除油劑、銹漬的清洗用除銹劑等等。專用的清洗劑針對特定污垢起作用，在適應性及清洗效率等方面考慮的更加全面。

Select special cleaning agents for different dirt, such as oil remover for oil cleaning, rust remover for rust cleaning, etc. The special cleaning agent works for specific dirt and considers more comprehensively in terms of adaptability and cleaning efficiency.

2、清洗劑表面張力、蒸汽壓、黏度

2. Surface tension, steam pressure and viscosity of cleaning agent

超聲波清洗的主要機理是空化作用，而清洗劑表面張力、蒸汽壓、黏度等特性與超聲波空化強弱息息相關，不同的清洗劑其空化閥值也不同。當清洗劑表面張力大、黏度大時是不利于超聲波空化的，而高蒸汽壓也會降低空化強度。因此，表面張力大、蒸汽壓高和黏度大的清洗劑都不利于超聲波清洗。

The main mechanism of ultrasonic cleaning is cavitation, and the surface tension, steam pressure and viscosity of cleaning agent are closely related to the strength of ultrasonic cavitation. The cavitation threshold of different cleaning agents is also different. When the surface tension and viscosity of the cleaning agent are large, it is not conducive to ultrasonic cavitation, and high steam pressure will also reduce the cavitation intensity. Therefore, cleaning agents with high surface tension, high steam pressure and high viscosity are not conducive to ultrasonic cleaning.

3、安全環保

3. Safety and environmental protection

需考慮廢液處理問題，優選常溫、低毒、安全、高效的新型環保清洗劑。其次，需要注意的是當超聲波清洗設備未做任何防爆措施時，嚴禁使用易燃易爆的清洗劑。

Firstly, waste liquid treatment should be considered, and a new environmental protection cleaning agent with normal temperature, low toxicity, safety and high efficiency should be selected. Secondly, it should be noted that when the ultrasonic cleaning equipment is not provided with any explosion-proof measures, it is strictly prohibited to use flammable and explosive cleaning agents.