What should I do if the surface of the stainless steel tube is slightly rusted or if other dirty things are difficult to wash? You can consider the acid hydrazine process to clean 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 base of the stainless steel tube, the dirt on the surface of the stainless steel seamless tube will also disappear, so that the surface of the stainless steel tube can be purified.
After the production of stainless steel seamless steel pipe, 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.
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.
The preparatory work for the surface of the stainless steel seamless pipe before pickling is acid cleaning, and the welding coating, splash, burr, dirt, etc. of the pipe fittings must be cleaned before passivation. 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 25mg/l.