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 chromium and nickel, the better the corrosion resistance, such as 304 material nickel to the content of 8-10%, chromium content of 18-20%, such stainless steel in general is not rusted.
2, the smelting process of the producer will also affect the corrosion resistance of stainless steel.
Smelting technology is good, advanced equipment, advanced technology of the large stainless steel plant both in the control of alloying elements, impurity removal, billet cooling temperature control can be guaranteed, so the product quality is stable and reliable, good inherent quality, not easy to rust. On the contrary, some small steel mills are backward in equipment, technology, smelting process, impurities can not be removed, the production of products will inevitably rust.
3, the external environment, dry climate and good ventilation is not easy to rust.
And air humidity, continuous rainy weather, or air containing acidity and alkalinity in the environmental areas will be easy to rust. 304 material stainless steel, if the surrounding environment is too poor is also rusty.
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