Industrial chemical etching of metal etching machines usually has the following four steps:
1. Cleaning treatment: The purpose is to clean all kinds of stains on the surface of the hair to be corroded to ensure that the adhesion of the anti-corrosion layer to the metal surface is uniform and the etching speed is uniform. Commonly used cleaning methods are: organic solvent cleaning, alkaline chemical cleaning, acid chemical cleaning, ultrasonic cleaning and electrolytic cleaning. During use, it can be selected according to the type of metal material of the part and the degree of contamination of the surface of the part.
2. Anti-corrosion treatment: The purpose is to protect the surface that does not need to be corroded, so that the metal surface that needs to be corroded is completely exposed, and is corroded by the corrosive agent compatible with the metal material. This process requires that the corrosion-resistant material adheres firmly to the metal surface, and the corrosion-resistant layer does not fall off during the entire corrosion process. Anti-corrosion treatment mainly includes: screen printing anti-corrosion technology, photographic chemical anti-corrosion technology, pad anti-corrosion technology, graphic electroplating anti-corrosion technology, laser lithography anti-corrosion technology and scribing anti-corrosion layer technology.
3. Anti-corrosion processing: It is the process of corroding metal parts to be corroded after being prepared according to the requirements of the drawings. Mainly controlled in this process: etchant concentration, corrosion temperature, time of day, and the like. Metal corrosion processing can be divided into five basic types according to the drawings, namely: overall corrosion, selective corrosion, multi-step corrosion, taper corrosion and chemical cutting. The metal is completely corroded without anti-corrosion treatment, and the parts can be corroded after being cleaned.
4. Remove the anti-corrosion layer: After the parts are removed from the metal corrosion machine, use a solvent, lye or other cleaning agent to remove the corrosion-resistant layer on the surface of the part.
