How to wash off the rust on the surface of stainless steel seamless pipe

Stainless steel seamless pipes are generally treated before leaving the factory, and there will be no rust on the surface. However, some rust stains that are difficult to remove may appear when they are used for a long time and the use environment is harsh. At this time, it is necessary to carry out the "pickling" cleaning procedure on the stainless steel seamless pipe.
After the production of stainless steel seamless pipes, a procedure is generally carried out, which is "pickling". Pickling can remove surface pollution stains for stainless steel pipes. After the stainless steel seamless pipe is produced, the surface is acid white.
The preparatory work to be done before pickling the surface of the stainless steel seamless pipe includes pickling and passivation. The welding coating, splashes, burrs, dirt, etc. The surface of the stainless steel pipe should be wiped clean with gasoline or other organic solvents. If it is a large area of dirt, it can be cleaned with steam or 3~5% caustic soda (NaOH) solution, then rinsed with water and dried. Note that the CL-concentration of the water used shall not exceed 25mg/l.
What should I do when there is a slight rust or other dirt on the surface of the stainless steel seamless pipe that is difficult to wash off? You can consider using the acid washing process to clean the slight rust on the surface of the stainless steel thick-walled pipe without destroying the oxide film on the surface of the stainless steel pipe or other substrates of the stainless steel pipe, and the dirt on the surface of the stainless steel seamless pipe will also disappear. Purify the surface of the stainless steel pipe.
In order not to damage the performance of stainless steel pipes when cleaning stainless steel seamless pipes with chemicals, you can use the passivation process to form a dense oxide film or oxygen adsorption layer on the surface of stainless steel pipes to prevent chemicals and The metal matrix of the stainless steel pipe develops the reaction of the telephone science retest, which can improve the corrosion resistance of the surface of the stainless steel pipe.
Centerway Steel adopts stainless steel pipe blanks from famous large steel factories at home and abroad, such as Shanghai Steel No. 5 Factory, and adopts domestic advanced technology and testing methods. The annual output of high-pressure boiler tubes, medium and low-pressure heat exchanger tubes, oil cracking tubes, and stainless steel tubes for fluid transportation is more than 10,000 tons. It is one of the professional manufacturers of stainless steel tubes. The products are widely used in aviation, aerospace, petroleum, chemical industry, and oil refining , fertilizer, shipbuilding, food and bioengineering and other fields