Study of passive films formed on AISI 304 stainless steel by impedance measurements and photoelectrochemistry

Journal Article · Sun Dec 31 23:00:00 EST 1989 · Journal of the Electrochemical Society; (USA)

DOI:https://doi.org/10.1149/1.2086444· OSTI ID:6884709

Simoes, A M.P.; Ferreiro, M G.S. ^[1]; Rondot, B; Belo, M ^[2]

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1. Dept. de Engenharia Quimica, Instituto Superior Tecnico, 1096 Lisboa Codex (PT)
2. Centre National de la Recherche Scientifique, 94 - Vitry-sur-Seine (France). Centre d'Etudes de Chimie Metallurgique

Moss-Schottky plots and photoelectrochemical measurements were made on films formed at different potentials on AISI 304 stainless steel in a borate/boric acid solution, pH 9.2. The results allowed the determination of the semiconductive properties and band structure of the films, which account for the existence of two kinds of films depending on the formation potential. For potentials below 0 V (SCE), the results point out for a film with an inverse spinel structure constituted by Cr-substituted magnetite with two donor levels. Above 0 V only one donor level is detected, which should be Fe{sup 2 +} on tetrahedral sites.

• OSTI ID: 6884709
• Journal Information: Journal of the Electrochemical Society; (USA), Journal Name: Journal of the Electrochemical Society; (USA) Vol. 137:1; ISSN JESOA; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
360602 -- Other Materials-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
AUSTENITIC STEELS
BORATES
BORIC ACID
BORON COMPOUNDS
CHALCOGENIDES
CHEMISTRY
CHROMIUM
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
DEPOSITION
ELASTIC SCATTERING
ELECTRIC IMPEDANCE
ELECTROCHEMISTRY
ELEMENTS
FILMS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
HYDROGEN COMPOUNDS
IMPEDANCE
INORGANIC ACIDS
IRON ALLOYS
IRON BASE ALLOYS
IRON COMPOUNDS
IRON ORES
IRON OXIDES
MAGNETITE
MATERIALS
METALS
MINERALS
MORPHOLOGY
MOTT SCATTERING
NICKEL ALLOYS
ORES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PHOTOCHEMISTRY
PLASMA
SCATTERING
SCHOTTKY BARRIER DIODES
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SEMICONDUCTOR MATERIALS
SOLID-STATE PLASMA
STAINLESS STEEL-304
STAINLESS STEELS
STEEL-CR19NI10
STEELS
SURFACE COATING
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS