Carbon steel tee passivation process can be specifically divided into many types, commonly divided into wet and dry two.The iron oxide formed on ordinary carbon steel continues to oxidize, expanding the corrosion and eventually forming holes.The surface of carbon steel can be secured by electroplating with paint or oxidization-resistant metals such as zinc, nickel and chromium, but, as is known, this protection is only a thin film.If the protective layer is broken, the steel underneath begins to rust.
 

The passivation effect of carbon steel tee depends not only on the passivation process, but also on the stainless steel elbow material itself, the specific influencing factors are the elements contained in the stainless steel elbow, stainless steel metallographic structure, stainless steel processing state.In the composition of elements, chromium and nickel belong to the passivation of strong elements, the passivation of iron is second, therefore, the higher the content of chromium and nickel, the stronger the passivation of stainless steel.

Austenitic and ferritic stainless steel elbow has uniform structure and good passivability. Martensite stainless steel is strengthened by heat treatment, and its metallographic structure is multi-phase structure, so the passivability is not strong.After machining, the smooth surface of carbon steel tee has good passivation. The surface of the workpiece obtained by casting and sandblasting is coarse and dry, which is not conducive to passivation.Carbon steel tee will not corrode, pitting, rust or wear.Stainless steel is also one of the strongest metal materials used in construction.