Introduction to the pickling process for the surface of stainless steel pipes

What should I do when there is slight rust or other dirt on the surface of a stainless steel pipe that is difficult to remove? You can consider using the acid washing process to clean the slight rust on the surface of thick walled stainless steel pipes without damaging the oxide film or other substrates on the surface of the stainless steel pipes. The dirt on the surface of seamless stainless steel pipes will also disappear, achieving purification on the surface of the stainless steel pipes.
After producing stainless steel seamless steel pipes, there is usually a process called "acid cleaning", which can remove surface pollution and stains for stainless steel pipes. Make the surface of stainless steel seamless pipes acid white after production is completed.
To avoid damaging the performance of stainless steel seamless pipes when cleaning with chemicals, you can use passivation technology to form a dense oxide film or oxygen adsorption layer on the surface of the stainless steel pipe to prevent the reaction between chemicals and the metal substrate of the stainless steel pipe, thereby improving the corrosion resistance of the stainless steel pipe surface.
The preparation work to be done before pickling the surface of stainless steel seamless pipes includes cleaning the welding coating, spatter, burrs, dirt, etc. on the pipe surface before pickling and passivation. The surface of stainless steel pipes 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 clean water and dried. Please note that the CL - concentration of clean water used should not exceed 25mg/l.