Chem milling involves several steps to achieve the desired outcome. The first step is to apply a maskant to the surface of the workpiece. The maskant is a protective coating that is resistant to the chemical solution used in the milling process. It is applied to specific areas of the workpiece that need to be protected from the chemical solution. The maskant can be applied using various methods, such as spraying, brushing, or stenciling.
Once the maskant has been applied, the workpiece is submerged in a chemical solution that selectively removes material from the exposed areas. The chemical solution typically consists of strong acids, such as hydrochloric acid or sulfuric acid, that dissolve the metal at a controlled rate. The depth of material removal can be controlled by adjusting the temperature, concentration, and exposure time of the chemical solution.
After the desired amount of material has been removed, the workpiece is removed from the chemical solution and the maskant is stripped away. The remaining material is cleaned and rinsed to remove any residue from the chemical solution. The final step is to inspect the workpiece to ensure that it meets the specified dimensions and tolerances.
Applications of chem milling