H2S gas when exposed to metal can be responsible for both general and localized corrosion. which depend on several parameters such as H2S concentration and the corrosion product layer formed. Therefore. the formation of passive film on 316L steel when exposed to H2S environment was investigated using several analysis methods such as FESEM and STEM/EDS analyses. https://www.freaknleather.com/product-category/magnetic-chip-collector/