If the surface of the 304 stainless steel
pipe is scratched or damaged, it must be cleaned immediately, otherwise the free iron will cause the stainless steel pipe to rust and corrode the stainless steel pipe.
Stainless steel is actually a weak corrosion-resistant steel, and the corrosiveness of 304 stainless steel depends on the alloying elements in the stainless steel. The reason why stainless steel pipes are corrosion-resistant is that the chromium in it plays a big role. When the chromium content in the stainless steel pipe reaches 1.2%, a chemical reaction occurs between the chromium and the corrosive medium when the surface of the 304 stainless steel
pipe is damaged, and an oxide film forms on the surface of the stainless steel pipe, preventing further corrosion of the internal matrix of the stainless steel pipe. Therefore, we must not destroy the passivation film when cleaning the surface of the stainless steel pipe, otherwise the stainless steel pipe will be corroded. Therefore, when cleaning stainless steel pipes, we must not use wire cleaning balls to scrub, but should use detergent and soft cloth to scrub.
If you find that cleaning agents and a soft cloth can't clean the traces on the surface of the stainless steel pipe, consider using carrots. Because carrots contain a lot of carotene acid, the carotid acid is completely released after the carrot is grilled on a torch. This carotid acid is a good helper for cleaning. The specific cleaning method is to cut the carrots and roast them on the fire until they are completely cooked. Try it with your hands to make them soft. Then use the roasted carrots to wipe the stainless steel tube. After wiping, rinse them with water to remove dirt. Traces are cleared.