Chemistry Commons^™

Location Of Cobalt Impurities In The Surface Oxide Of Stainless Steel 316l And Metal Release In Synthetic Biological Fluids, Xuying Wang, Jonas Hedberg, Heng-Yong Nie, Mark Biesinger, Inger Odnevall, Yolanda S. Hedberg

Chemistry Publications

Since 2021, cobalt (Co) is in Europe classified as carcinogen in quantities exceeding 0.1 wt-%. This affects nickel-rich stainless steels, which contain about 0.2 wt-% Co impurities. Previous findings show the bioaccessibility of Co in stainless steel to be primarily determined by the corrosion resistance. It has been unclear whether Co is distributed heterogeneously in the alloy and the outermost surface and whether a specific location would pose a risk for Co release under specific exposure conditions. This study aimed at locating Co in stainless steel 316L (0.2 wt-% Co) surfaces prior to and after exposure to different synthetic body …