The raw materials of stainless steel elbows mainly include steel ingots, billets, steel and other raw materials, and different raw materials occupy an important position in the use. Steel is a material of various shapes, sizes and properties required by steel ingots, billets or steel through pressure processing. Due to the high viscosity of the stainless steel elbow material and poor chip breaking performance, it is easy to cause the chips to scratch the workpiece thread or tap chipping when the stainless steel elbow is tapped, which affects the processing efficiency and thread quality.
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 form holes. The surface of stainless steel elbows can be guaranteed by electroplating with paint or oxidation-resistant metals (for example, zinc, nickel, and chromium), but, as people know, this protection is only a thin film. If the protective layer is damaged, the steel below will begin to rust.
It is different if it is to process stainless steel pipe fittings, because this is a metallurgical process from the inside to the outside. The secret of stainless 304 stainless steel fittings is that the metal chromium is added to the carbon steel, and the content is not low, at about 12%. After it comes into contact with air, the chromium will react with oxygen to form a layer on the surface of the carbon steel. The dense passivation film can effectively and continuously protect the stainless steel pipe fittings.
Moreover, this passivation film is super thin, and the natural luster of the steel surface can be seen, which makes the stainless steel pipe fittings have very unique surface characteristics. However, there is no guarantee that this protective film will not be damaged. Once damaged, the exposed steel will react with oxygen and re-form a passivation film and continue to take up his work. In theory, stainless steel pipe fittings will not rust, but in fact, the degree of rust produced by different levels of dry and wet environments is also normal.
