Surface treatment How to deal with uneven oxidation?
- Strengthen the pre-treatment of the surface of the parts, adopt suitable oil removal and cleaning processes to ensure that the surface is clean and the roughness meets the requirements; fully stir the blackening solution, regularly test and adjust the solution composition to ensure a stable concentration; optimize the placement of parts in the blackening tank to ensure that the solution can fully contact all parts of the parts, and can increase the solution circulation or shaking device appropriately.
The blackening film layer has poor adhesion.
- Before blackening, add a special process to remove oxidized skin, such as using acid washing or mechanical polishing; perform appropriate surface activation treatment on the parts, such as soaking in a specific activator solution; strictly control the temperature, time and other parameters of the blackening process, optimize and adjust according to the actual situation of the parts, and carry out small batch experiments as necessary to determine the optimal process parameters.
The black color does not meet the requirements (too dark or too light)
- Accurately determine the concentration of the blackening solution through chemical analysis, and adjust it according to the color deviation by diluting or adding the corresponding components; precisely control the blackening treatment time by using devices such as timers for precise timing; install an accurate temperature control device to ensure that the temperature of the blackening solution is stable within the specified range; for material difference issues, conduct sample tests on different batches of materials before mass processing, appropriately adjust the process parameters to adapt to material changes, and ensure the stability and consistency of the previous process.
