What is etching in chemical machining process? – Tongjin Technology
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What is etching in chemical machining process?

by 陈琼 08 Apr 2023 0 Comments

Etching is a process used in chemical machining to selectively remove material from a metal surface using a chemical solution. The process involves applying a protective mask or resist to the metal surface, then exposing it to a chemical solution that dissolves the unprotected areas of the metal. This results in the desired shape or pattern being etched into the metal surface.

The mask or resist used in etching can be made from a variety of materials, including photoresist, wax, or tape. The mask is applied to the metal surface before it is exposed to the etching solution. The mask can be applied using various methods, such as screen printing, photolithography, or inkjet printing.

The etching solution used in chemical machining depends on the type of metal being etched and the desired level of precision. The most commonly used etchants include acids such as nitric acid, hydrochloric acid, and ferric chloride. The etching solution dissolves the unprotected areas of the metal surface, leaving behind the desired shape or pattern.

After the etching process is complete, the mask or resist is removed from the metal surface, and the etched part is cleaned to remove any remaining chemical residues. The resulting part can be used as is, or it may require additional processing, such as polishing or plating.

Etching is a precise and versatile process that can be used to create complex shapes and patterns on metal parts. It is often used in the manufacturing of electronic components, medical devices, and aerospace parts, as well as in the production of decorative items such as jewelry and art pieces.

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