How to wash stainless steel seamless pipe surface rusty?
Stainless steel seamless pipes are generally treated at the factory, and there is no rust on the surface. However, when used for a long time and the use environment is bad, some rust which is difficult to remove may appear. At this time, it is necessary to carry out a "pickling" cleaning process for the stainless steel seamless pipe.
Pickling pool
After the production of stainless steel seamless pipes, a procedure is generally carried out, that is, "pickling", which can remove surface contamination stains for stainless steel pipes. After the stainless steel seamless pipe is produced, the surface is sour white.Before the pickling of the surface of the stainless steel seamless pipe is done, the pickling, splashing, burr, dirt, etc. of the pipe fittings must be cleaned before pickling. The surface of the stainless steel tube should be wiped clean with gasoline or other organic solvents. If it is a large area of dirt, it can be washed with steam or 3~5% caustic soda (NaOH) solution, then rinsed with water and dried. Note that the CL-concentration used should not exceed 25 mg/l.
What should I do if the surface of the stainless steel seamless pipe is slightly rusty or other dirty things are difficult to wash? You can consider using the acid hydrazine process to clean the slight rust on the surface of the stainless steel thick-walled tube without damaging the oxide film on the surface of the stainless steel tube or the other substrate of the stainless steel tube. The dirt on the surface of the stainless steel seamless tube will also disappear. The surface of the stainless steel tube is cleaned.
In order to clean stainless steel seamless pipe chemicals without destroying the performance of the stainless steel pipe, you can use a passivation process to form a dense oxide film or oxygen adsorption layer on the surface of the stainless steel pipe to prevent chemicals and The metal substrate of the stainless steel tube develops a telemetry retest reaction, thereby improving the corrosion resistance of the stainless steel tube surface.
