Four steps of metal chemical etching process

Four steps of metal chemical etching process

Industrial metal chemical corrosion processing usually involves the following four steps:

  • (1) Cleaning: The material to be corroded is subjected to surface treatment on the blank to remove various stains and oil stains and keep the surface clean. The material is selected mainly according to the type of metal material and the degree of contamination on the surface of the material to ensure that the anti-corrosion layer can adhere to the metal surface uniformly and the etching speed is uniform. Organic solvent cleaning, alkaline chemical and acid cleaning, ultrasonic and electrolytic cleaning, etc. are usually used.
  • (2) Anti-corrosion treatment: The surfaces that do not need to be corroded are protected by photosensitive ink, so that the metal surfaces that need to be corroded are completely exposed and corroded by the corrosive agent suitable for the metal material. The anti-corrosion material, i.e., photosensitive ink, must adhere firmly to the metal surface and the anti-corrosion layer will not fall off during the entire corrosion process.
  • (3) Corrosion processing: The main control of the process: corrosive agent concentration, corrosion temperature, etching time, etc. After the anti-corrosion pattern is made according to the requirements of the drawing, the corroded metal material is placed in the corrosion tank for etching.
  • (4) Removing the anti-corrosion layer: After the etching process is completed, the surface of the component is stripped by solvents, alkali solutions or other cleaning agents to remove the anti-corrosion layer.
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