1. The first cleaning preparation is to clean the surface of the electric heating tube, remove impurities, and then ensure that the surface of the electric heating tube is clean and clean.
2. Degreasing treatment: Immerse the electric heating tube in the degreasing night with a PH value of about 13. The degreasing liquid is relatively easy to buy in the market, soak it in the alkaline degreasing liquid and keep it for about 30 minutes. For treatment, use clean water to remove impurities generated by the chemical reaction on the surface to ensure that the surface is clean.
3. After acid eluting grease treatment, there will be alkaline substances and alkaline substances on the surface of the heating tube, so it needs to be cleaned with acidic liquid. Usually the pH of the acid liquid is about 3, and the immersion time is about 10 minutes. Use it after processing Clean the electric heating tube with clean water.
4. The blackening treatment ensures that the PH value of the liquid is between 2-4, and the treatment time is about 10 minutes. After treatment, clean the surface of the heating tube.
5. Drying and oiling After finishing the chemical treatment and cleaning of the surface of the electric heating tube, dry it and take out the clean water on the surface. After drying, oil the electric heating tube. After the blackening treatment, an oxide film will be formed on the surface of the heating tube, which has a better corrosion resistance and protection effect on the heating tube.
