Chemical etching
Corrosion is a technique in which a metal workpiece is removed using a chemical reaction or a physical impact.
Corrosion technology can be divided into two types: "wet etching" and "dry etching".
Generally referred to as corrosion, also known as photochemical etching, refers to the application of self-adhesive; exposure plate, development or screen printing screen image transfer, the protective ink in the area to be corroded to remove the need for corrosion, in the case of corrosion The metal contacts the chemical solution to achieve the effect of dissolving corrosion, forming the effect of unevenness or hollowing.
It can be used to manufacture printed embossed plates such as copper plate, zinc plate and stainless steel. It is also widely used in the processing of weight reduction instrument panels, billboard signs and thin workpieces that are difficult to process by traditional processing methods. The technical improvement and the development of process equipment can also be used for the processing of precision corrosion products of electronic sheet parts in the aviation, machinery and chemical industries. Especially in the semiconductor process, corrosion is an indispensable technology.
For example, stainless steel filter mesh, the round holes are formed by hollowing corrosion process.
Process: cleaning the workpiece to remove oil (stainless steel or other metal parts) --- coating --- baking dry --- exposure --- development -- etching -- peeling
Stainless steel surface chemical processing
The surface of the stainless steel product is etched with ferric chloride, and various patterns, patterns, characters, logos, and the like are drawn on the surface. The chemical etching process is to apply a protective ink or a sticker to the surface of the stainless steel that needs to be corroded now. Then, an etching solution composed of ferric chloride and a small amount of hydrochloric acid is placed, and the surface layer of the stainless steel acts on the ferric chloride, and the resulting chloride is dissolved in the etching liquid or deposited on the surface of the stainless steel.
