304L pickled stainless steel pipe

304L pickled stainless steel pipe

304L pickled stainless steel pipe is a specially treated stainless steel pipe, and its treatment process mainly includes two steps: pickling and passivation. This treatment method is designed to improve the corrosion resistance and rust resistance of 304L pickled stainless steel pipe.

First, pickling is an aggressive chemical cleaning process using an acidic solution, usually a nitrogen-hydrofluoric acid solution that is corrosive to stainless steel. The purpose of this step is to remove contaminants on the surface of stainless steel, including surface deposits, welding tempering color, and the underlying chromium-depleted layer, which may hinder the formation of a protective film, thereby affecting the corrosion resistance and rust resistance of stainless steel. After pickling, rinse the surface of the stainless steel pipe with clean water to ensure that the surface is clean and clean, creating conditions for the subsequent formation of a protective film.

Next, passivation is a chemical cleaning method that uses a solution that is not corrosive to 304L pickled stainless steel pipe, but can effectively remove free iron that hinders the formation of a protective film. Passivation treatment can thicken the original protective film, thereby further improving corrosion resistance. This step not only protects and repairs the protective film, but also further consolidates the protective film on the surface of the 304L pickled stainless steel pipe, significantly improving its corrosion resistance and rust resistance.

Therefore, the 304L pickled stainless steel pipe that has been pickled and passivated can be regarded as a true 304L pickled stainless steel pipe, and its corrosion resistance and rust resistance have been greatly enhanced, which is particularly suitable for application environments with high corrosion resistance requirements, such as the chemical industry, the petroleum industry, etc.