Initial oxidation of duplex stainless steel |
| |
Authors: | ?rtomir Donik Aleksandra Kocijan Irena Paulin Boris Pihlar |
| |
Institution: | a Institute of Metals and Technology, Lepi pot 11, SI-1000 Ljubljana, Slovenia b Faculty of Chemistry and Chemical Technology, Ašker?eva 5, SI-1000 Ljubljana, Slovenia |
| |
Abstract: | Three different techniques were used to produce thin oxide layers on polished and sputter-cleaned duplex stainless-steel samples. These samples were exposed to 10−5 mbar of pure oxygen inside the vacuum chamber, exposed to ambient conditions for 24 h, and plasma oxidized. The oxide layers thus produced were analysed using XPS depth profiling in order to determine the oxide layers’ compositions with depth. We found that all the techniques produce oxide layers with different traces of metallic components and with the maximum concentration of chromium oxide shifted towards the oxide-layer-bulk-metal interface. A common characteristic of all the oxide layers investigated is a double-oxide stratification, with regions closer to the surface exhibiting higher concentrations of iron oxide and those more in-depth exhibiting higher concentrations of chromium oxide. A simple non-destructive Thickogram procedure was used to corroborate the thickness estimates for the thinnest oxide layers. |
| |
Keywords: | Duplex stainless steel Stainless steel Oxidation XPS Thickogram Plasma oxidation |
本文献已被 ScienceDirect 等数据库收录! |
|