Stainless steel flanges and pipe fittings are considered to be free from rust. However there still are some possibility of getting corrosive and rust. How can we prevent stainless steel flanges and pipe fittings from corrosion? 

1.The content of alloying elements.

Generally speaking, the content of chromium in 10.5% steel is not easy to rust. The higher the content of chrome nickel, the better the corrosion resistance. For example, the content of nickel in 304 material is 8-10%, and the content of chromium is 18-20%. Such stainless steel will not rust under normal conditions.

2.The smelting process

The smelting process will also affect the corrosion resistance of stainless steel. The large stainless steel plant with good smelting technology, advanced equipment and advanced technology can guarantee the control of alloy elements, the removal of impurities and the control of the cooling temperature of the slab. Therefore, the product quality is stable and reliable, the internal quality is good, and it is not easy to rust. On the contrary, some small steel mills are backward and the process is backward. During the smelting process, impurities cannot be removed, and the products produced will inevitably rust.

3.The external environment, 

Stainless steel in dry climate and ventilated environment is not easy to rust. The environment with high humidity, continuous rainy weather, or high pH in the air is prone to rust.