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Precautions for stainless steel polishing

Precautions for stainless steel polishing

After long-term use of stainless steel, the kettle wall will cause problems such as scratches in varying degrees. Therefore, in order not to affect the use effect, the polymerization kettle will be polished. However, the polishing should master the scale and avoid throwing the kettle wall too thin to use. Here are some problems that should be paid attention to when polishing the polymerization kettle:

1. Due to deep scratches or depressions (depth greater than 30 microns) on the wall of the polymerization kettle in previous work, only smooth grinding can be carried out without deep grinding, so as to avoid thinning the stainless steel composite layer and shorten the service life of the polymerization kettle.

2. After the polishing inspection of the polymerizer is qualified, the polymerizer shall be painted manually once: the temperature in the polymerizer shall be heated to 80 ℃ and dried for 1 hour. After drying in the polymerizer, the workers shall brush the inner side of the internal cooling pipe, the back of the paddle blade, dead corners, etc. with a brush. The coating shall be thin, and a large area of manual spraying shall be carried out. After coating, the temperature shall be heated to 80 ℃ and dried for 1 hour. The kettle coating liquid adopts small bottles of kettle coating liquid. For the first 20 kettles, double the amount of kettle coating liquid each time, dry it before coating, and dry it after coating for feed production.

3. Stainless steel polishing shall be carried out after the transformation of the coating kettle nozzle as far as possible to avoid serious sticking of stainless steel to the kettle again due to poor coating effect after polishing.