Corrosion resistance of sanitary stainless steel elbow

The corrosion resistance of the sanitary stainless steel elbow is due to its smooth inner wall, low resistance to heat flow, acid and alkali resistance, long service life, and easy installation. Stainless steel elbows are steels that are resistant to weak corrosive media such as air, steam, and water, and chemically corrosive media such as acids, alkalis, and salts. Also known as stainless acid-resistant steel. In practical applications, steel that is resistant to corrosion by weak corrosive media is often referred to as stainless steel stamping elbow, and steel that is resistant to chemical media is called acid-resistant steel. Due to the difference in chemical composition between the two, the former is not necessarily resistant to corrosion by chemical media, while the latter is generally non-corrosive. The corrosion resistance of sanitary stainless steel elbows depends on the alloying elements contained in the steel. Chromium is the basic element for the corrosion resistance of stainless steel elbows. When the chromium content in the steel reaches about 1.2%, the chromium interacts with the oxygen in the corrosive medium to form a thin oxide film (self-passivation) on the surface of the steel. Membrane), which can prevent further corrosion of the steel matrix. Stainless steel elbows have different production processes and processes, and need to be produced and processed according to certain conditions during processing. Elbow pipe fittings of different properties need to be paid attention to in processing. The chromium-containing sanitary stainless steel elbow also integrates mechanical strength and high extensibility, easy to process and manufacture parts, and can meet the needs of architects and structural designers. All metals react with oxygen in the atmosphere to form an oxide film on the surface. Unfortunately, the iron oxide formed on ordinary carbon steel continues to oxidize, causing the corrosion to continue to expand and eventually forming holes. It is possible to use paint or oxidation-resistant metals (such as zinc, nickel and chromium) for electroplating to ensure the surface of carbon steel, but, as people know, this protection is only a thin film.