How to optimize the treatment of blackening of electric heating tubes

How to optimize the treatment of blackening of electric heating tubes

Users, purchasers, or producers all know that prolonged use of electric heating tubes can cause them to turn black over time. If used in liquid for a long time, it can accumulate scale on top. Today, let's discuss how to optimize the treatment of blackening of electric heating tubes? To help more troubled people and solve their troubles.

The simplest method for blackening the surface of electric heating tubes under normal working conditions is as follows:

1. Firstly, clean the surface of the metal tube and keep it clean;

2. The second is to perform degreasing treatment on the surface, which can completely place the metal tube in the degreasing solution. The pH value of the degreasing solution should be around 13, and the time should not be less than half an hour. After degreasing, rinse with clean water;

3. Next, acid washing can be carried out. The pH value of the acid washing solution is about 3, and the processing time should not be longer than 10 minutes. After acid washing, rinse with clean water;

4. Blackening treatment: The pH value of the pool solution is between 2-4, and the treatment time is about 10 minutes. After blackening, it is thoroughly cleaned;

5. Finally, dry and oil;

In the production process of electric heating tubes, blackening treatment is used. If the above five points are followed, the blackening treatment of the electric heating tubes can be carried out. Heat treatment is a process of heat treatment for metal objects such as stainless steel. After treatment, there will be a layer of oxide film on the surface to achieve the purpose of corrosion prevention and rust prevention. After heating treatment, the wear resistance and hardness of the surface of the electric heating tube will be improved, and it will not affect the components inside the electric heating tube.

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