The Corrosion Factors
The corrosion of stainless steel is affected by three main factors:
Firstly: The content of alloying elements, in general, the steel’s chromium content is of 10.5% then not easy to rust. The higher the content of chromium-nickel, the better corrosion resistance. For example, the nickel content of 304 steel is 8%-10%, the chrome content is 18%-20%, suhc kind steel could not easy to rust under normal situations.
Secondly: Smelting process of manufacturing enterprises will also affect the corrosion resistance of stainless steel. Better smelting technology, advanced equipment, better craftsmanship, of big and advanced stainless steel manufacturer will have better control of the alloying elements, impurity removal, billet cooling temperature, then make sure of the product quality is stable and reliable, the intrinsic quality is good, not easy to rust. Otherwise,small factory due to equipment behind, backward technology, during smelting process, impurities can not be removed. Such product easy to rust.
Thirdly, Outside environmental also has effect on the corrosion of stainless steel. Dry and well-ventilated environment is not easy to rust. The air humidity, continuous rainy weather, or air with high pH environment is easy to rust. For 304 stainless steel, If the surrounding environment is too poor will be rusty.