The blackening treatment of Metal Stamping Parts is a surface treatment method mainly used to enhance the corrosion resistance, wear resistance, and improve the appearance of parts. The following are the general steps for blackening treatment:
Pre processing:
Cleaning: Use cleaning agents (such as alkaline cleaning agents or organic solvents) to remove oil, dust, and impurities from the surface of Metal Stamping Parts.
Pickling: Use a dilute acid solution (such as dilute sulfuric acid or hydrochloric acid) to remove oxides, rust, and stains on the surface of Metal Stamping Parts. This step is to ensure that the metal surface is clean so that the blackening agent can adhere evenly.
Rinse: Thoroughly rinse Metal Stamping Parts with clean water to ensure there is no acid residue.
Blackening treatment:
Blackening agent selection: Select the appropriate blackening agent based on the material of Metal Stamping Parts and the expected blackening effect. Common blackening agents include oxidants (such as sodium nitrite, sodium nitrate, etc.) and catalysts (such as sodium hydroxide, sodium carbonate, etc.).
Soaking treatment: Completely immerse the pre treated Metal Stamping Parts into the blackening agent, and control the soaking time and temperature. The length of soaking time and the temperature can affect the blackening effect, so adjustments need to be made according to specific circumstances.
Monitoring: During the blackening process, it is necessary to monitor the concentration, temperature, and soaking time of the blackening agent to ensure stable treatment effects.
Post processing:
Cleaning: After blackening treatment, thoroughly rinse Metal Stamping Parts with clean water to remove any remaining blackening agent on the surface.
Drying: Place the parts in a well ventilated area or use drying equipment to completely dry them.
Coating (optional): As needed, a protective coating such as rust proof oil, paint, etc. can be applied to the surface of the blackened parts to further improve their corrosion resistance and wear resistance.
Quality control:
Inspection: Inspect the Metal Stamping Parts after blackening treatment to ensure uniform blackening effect, no omissions or peeling.
Testing: If necessary, performance tests such as corrosion resistance and wear resistance can be conducted to ensure that the parts meet the usage requirements.