Electric tube black handle

Sometimes used in the production process of heating tube black processing, heat processing is a process of heat treatment of stainless steel and other metal objects, there will be a layer of oxide film after processing surface corrosion preventive purposes. After heat processing to improve the wear resistance of the heating tube surface, increase the surface hardness, and will not affect the parts of the electric tube inside.

Under normal working conditions, usually black in the following steps:

1, first cleaning the surface of the metal tube to keep it clean;

2, the second is surface degreasing treatment, this process metal tube can be completely placed on the degreasing fluid which Skim the PH value of the best 13 or so, time is not less than half an hour. The skim After washed with water.

3, the next pickling acid lotion, PH value of about 3, the processing time of no longer than 10 minutes, washed with water in the pickling after;

4, black handle: pool concentration, PH value between 2-4, the processing time of 10 minutes up and down without having to clean the black after;

5, and finally drying, oiling;

This is the heating tube surface black easiest way.

Heating pipe , heating pipe , heating wire , single-head electric tube , stainless steel heating pipe , flange type heating tube , threaded-type electric tube and explosion-proof electric tube , electric ring , and temperature control products manufacturers - Shanghai Chong Hai Electric Co., Ltd. ,

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