Naslov
Change of an n-type to a p-type conductivity of the N steel's semiconductor passive film: enhancement in the pitting corrosion resistance

Autori
Metikoš-Huković, Mirjana ; Grubač, Zoran ; Omanović, Saša

Izvornik
Journal of the Serbian Chemical Society (0352-5139) 78 (2013); 2053-2067

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Stainless steel; Corrosion; Passive films; Metal oxide semiconductors

Sažetak
The electrochemically-assisted modification of the N-austenitic stainless steel (ASS N25) surface was successfully employed to improve barrier properties of the passive film in a chloride containing solution. The chemical composition, electronic and barrier properties of the surface film before and after the electrochemical treatment were examined using X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). Electrochemical measurements were carried out in a corrosion testing solution. The excellent corrosion resistance (both pitting and general) of the N-steel’s modified surface was discussed according to the Mott-Schottky analysis of the interfacial capacitance of the space charge layer and impedance spectroscopy results. The conductivity change of the surface film from an n- to a p-type in the pitting susceptible region was explained using the XPS analysis and semiconducting properties of the film.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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