If the flange electric heating pipe turns black, don't worry. The flange electric heating pipe manufacturer will teach you the solution. Clean the surface of the electric heating pipe to eliminate the residue, so as to ensure the cleaning and tidiness of the surface of the heating pipe. Deoiling solution: the electric heating tube is infiltrated into the deoiling night with pH value above or below 13. The deoiling solution is very easy to buy in the market at present. It can be infiltrated into the alkaline deoiling solution for about 30 minutes. When it is time to solve the surface of the heating tube, the residue caused by chemical changes on the surface is eliminated with cold water to ensure the surface cleaning.
After pickling, passivation and deoiling, there will be alkaline substances and alkaline substances on the surface of the heating pipe. Therefore, it is necessary to clean the acid-base liquid. Generally, the pH value of the acid liquid is about 3, and the infiltration time is about 10 minutes. After the traffic accident is over, clean the electric heating pipe with cold water. Blackening treatment ensures that the pH value of the liquid is between 2-4, and the solution time is about 10 minutes. After the solution, the surface layer of the heating tube is removed. Air drying and oiling: after solving and cleaning the organic chemical problem on the surface of the heating tube, air drying should be carried out, and the cold water on the surface should be removed. After air drying, oiling should be carried out on the electric heating tube. After blackening, the surface of the heating tube will form a layer of air oxide film, which has good anti-corrosion and maintenance effect on the heating tube.