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XPS study of passive films formed on molybdenum‐implanted austenitic stainless steels by E. De Vito; P. Marcus is a Engineering article available to read on EtoBox.

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## Abstract Austenitic stainless steels (Fe–19Cr–10Ni (at.%)) have been implanted with molybdenum ions (Mo^+^, 100 keV, 2.5 × 10^16^ atoms cm^−2^). The implanted material has been characterized by XPS and RBS. The implanted region has a thickness of ∼1000 Å with a maximum molybdenum concentration of ∼9 at.% Mo located at ∼210 Å from the surface. The effects of implanted molybdenum on the passivation of the alloy in 0.5 M H~2~SO~4~ have been investigated by electrochemistry and XPS. Prior to electrochemical experiments, surfaces with well defined Mo concentrations were produced by argon ion sputtering the implanted alloy for a fixed time in the preparation chamber of the spectrometer in order to reach a well defined point on the molybdenum depth profile. After XPS analysis the samples were transfered without exposure to air into a glove‐box with an inert atmosphere. The electrochemical behaviour of the alloy is significantly modified by the implanted molybdenum. The major effect is that the activation peak disappears. A bilayer structure (outer hydroxide/inner oxide) of the passive film is observed for both the implanted and non‐implanted alloys and the thicknesses of the films are

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Author

E. De Vito; P. Marcus

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley; Research Square (ISSN 0142-2421)

Published

1992

Language

EN

Field

Engineering (Physical Sciences)