In fact, distinguishing quality is very effective. The corrosion resistance of stainless steel mainly depends on the content of chromium and nickel. The higher the content, the lower the possibility of rust. At present, the 201 nickel content on the market is only 1%, and the chromium content is only 12%, which is easy to rust. But the price difference between the two is more than twice. As long as the user uses some stainless steel solder joint pickling solution (also called cleaning molten steel) on the surface of the steel pipe, if the surface of the steel pipe does not change color, the quality is good and it is not easy to rust. On the contrary, if the black is faster, the quality is worse, it is easy to become black and rust. To keep it rust-free, only by scrubbing and cleaning the surface regularly can it not rust.
