After long time using,the heating element will be black.
The premise of its blackening treatment is to keep the surface clean and clean. If there are impurities on its surface, it will not be conducive to blackening treatment.
The first thing to do is to clear the surface of organic matter, that is, the so-called degreasing treatment. Degreasing is easy to do. Concerning the degreasing, all you need is degreasing liquid.
After the c alkali wash, the following process is acid-washed. There is not only alkaline organic matter on the surface, but also acidic organic matter. So acid cleaning is also very necessary. The acidity is required to be a ph value of 3, and the processing time is not required to be about 10 minutes.
The final step is to dry the heater. Drying is to remove the water sticking to the surface .Finally, it's oiling.
After treatment above, it will improve the wear resistance of the electric heater's surface , improve the hardness of the surface, and will not affect the components inside.
