First, clean the surface of the electric heating tube, remove impurities, and ensure the clean and clean surface of the electric heat pipe.
Immerse the electrical heating tube into the PH value of about 13 degree-free night for 30 minutes. After the time, heat the water to remove the impurities produced by the chemical reaction on the surface to ensure the surface cleaning.
After degreasing treatment, the electric heating tube is placed in the PH value of 3 acidic solution for 10 minutes, and then the electric heating tube is cleaned with water.
4. Black processing:
Ensure that the PH value of the liquid is 2-4, and the processing time is about 10 minutes. After processing, the surface of the heating tube is cleaned.
5. Drying oil:
After finishing the surface chemical treatment and cleaning of the electric heat pipe, the surface should be dried and removed. After drying, the electric heating tube shall be oily.
A layer of oxide film is produced on the surface of the heating tube after dark treatment, and the oxidation film has a good corrosion resistance and protective effect on the heating tube.
Contact Person: Mr. Qiu