Abstract
The structure and composition of the passive film formed on the super-austenitic AISI 254SMO stainless steel in borate solution were studied using photocurrent spectroscopy coupled with electrochemical measurements. Charge passed calculations suggested that the phase formed in the transpassive region is insoluble. Evidence for the presence of Ni in the passive film was also found. Photocurrent spectroscopy revealed that an n-type oxide phase dominated at more positive potentials, where was expected. However, once the phase started to form in the reverse potential scan both and phases appeared together in the passive region between 200 and , with both showing n-type behavior. At more negative potentials, cathodic photocurrents were observed, most likely due to the reduction of the to p-type . The magnitude of the bandgaps of the oxides were found to be independent of the values of the applied potential.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
