It is unavoidable of the corrosion of metal by scale. The corrosion and condensation of scale on the metal heating tube, which will reduce the thermal efficiency and waste electrical energy. However, more seriously, the heating tube will burst, which endangers the safety of human life. Besides, it should pay attention on the corrosion of inner tank by scale.
The accumulation of scale in industrial electric heating tubes will surround the heating tubes layer by layer. The thermal conductivity of scale is very low, resulting in waste of electrical energy. At the same time, due to the large scale and poor thermal conductivity, the internal temperature of the electric heating tube is too high, which will greatly shorten the service life of the heating tube. Generally speaking, the electric heating tube with a service life of 3 years can only be used for half a year to 1 year under the condition of excessive scale. In addition, scale easily breed bacteria and pollute water quality. More seriously, it will also burst the surface of the electric heating tube, resulting in a risk of electric shock.