Flange Stainless Steel Heating Tube Price - Yangzhou Darui

Flange Stainless Steel Heating Tube Price - Yangzhou Darui

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How should the blackening problem of flange electric heating tubes be correctly handled? Below, the cast aluminum heater manufacturer will introduce the relevant content to you:

1. Pre-cleaning preparation

First, clean the surface of the electric heating tube to remove impurities, thereby ensuring the surface of the heating tube is clean and tidy. 

2. Degreasing treatment

Immerse the electric heating tube in a degreasing solution with a pH value of about 13,The degreasing solution is easy to buy on the market,Immerse in the alkaline degreasing solution for about 30 minutes,Treat the surface of the heating tube for this time,Use clean water to remove impurities generated by chemical reactions on the surface

Ensure the surface is clean. 

3. Pickling

After degreasing treatment,the surface of the heating tube will have alkaline substances and alkaline substances,so it is necessary to use acidic liquid for cleaning,Generally, the pH value of the acid solution is about 3,Immersion time is about 10 minutes. After treatment, rinse the electric heating tube with clean water. 

4. Blackening treatment

Ensure the liquid pH value is between 2-4,treatment time is about 10 minutes,after treatment, clean the surface of the heating tube. 

5. Drying and oiling

After the surface chemical treatment and cleaning of the heating tube,

dry it to remove the clean water on the surface, and after drying, oil the electric heating tube. After blackening treatment, a layer of oxide film will be formed on the surface of the heating tube, which plays a good role in corrosion resistance and protection for the heating tube.

Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.