Tea filter screen

發布時間：2019-08-01

Introduction to the working principle and practical application of tea filters. First, cover the parts that need to be protected on the substrate with silk screen or screen printing, then use chemical or electrochemical methods to corrode the unnecessary parts, and finally remove the protective film When etching the tea filter, we may find that some parts of the material are not etched. If we encounter such a situation, we need to analyze it
The reasons for incomplete etching include: 1. too fast corrosion rate 2. too dilute and insufficient concentration of corrosive solution Countermeasures: the corrosion rate can be appropriately reduced. The reasons for a slow etching rate include: 1. too high etching temperature 2. too slow development speed Countermeasures: 1. lower etching temperature 2. increase development speed too slowly
The process of material damage caused by the combined action of wear and corrosion on tea filter screens is called wear corrosion. Wear and corrosion can occur in high-speed flowing metal corrosive fluid pipelines, as well as in pumps, pipelines, and other locations carrying suspended friction particles of metal corrosive fluids. Some overcurrent components, such as valve discs (heads) and seats in high-pressure pressure reducing valves, impellers of centrifugal pumps, blades in fans, etc., have high relative flow velocities of corrosive media in these areas, making it difficult for the passive film on the surface of passive corrosion-resistant metal materials to recover due to excessive mechanical erosion, and the corrosion rate will significantly increase. If there are solid particles in the corrosive media, it will greatly exacerbate wear and corrosion
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Tea filter screen