How to repair a corroded heating element?
Due to the special use environment of the electric heating element, sometimes the heating element is inevitably corroded during use. When the heating element is found to be corroded, we can use chemical or physical methods to repair it.
1. Chemical method:
Use spray or pickling paste to assist the rusted parts to be re-passivated to form a chromium oxide film to restore the corrosion resistance. Apply the pickling paste to the surface to be treated, the thickness of the coating film is 0.5-2mm, the general reaction time is 3-10 minutes or more, when it is used below 0°C or where the oxide scale is thick, the time needs to be extended appropriately. It is best to use a brush to wash it several times during the treatment process. After the surface oxide scale is completely removed, rinse it with water (lime water or alkaline water is better) to avoid rust back. After pickling, in order to remove all contaminants and acid residues, it is important to rinse properly with clean water. After all treatments, use polishing equipment to polish again, and then seal with polishing wax. For those with slight rust spots, you can also use a 1:1 gasoline and engine oil mixture to wipe off the rust spots with a clean cloth.
2. Mechanical method:
Sandblasting, using glass or ceramic particles to clean, submerge, brush and polish. It is possible to use mechanical methods to wipe off the pollution caused by the previously removed materials, polishing materials or annihilation materials. All kinds of pollution, especially foreign iron particles, can become a source of corrosion, especially in humid environments. Therefore, mechanically cleaned surfaces should be properly cleaned in dry conditions. The use of mechanical methods can only clean the surface, and cannot change the corrosion resistance of the material itself. Therefore, it is recommended to re-polishing with polishing equipment after mechanical cleaning and sealing with polishing wax.
In order to let more users understand the application of heating element materials in different corrosion-resistant liquids, we will now tell you that there are mainly 304 stainless steel heating elements, 316 stainless steel heating elements, titanium heating elements, Teflon heating elements, and quartz in the market. Selection of heating element application in corrosive environment.