Published January 1990 | Version v1
Journal article Metadata-only

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

Creators

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

Description

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 Fe2+ on tetrahedral sites

Additional details

Publishing Information

Journal Title
Journal of the Electrochemical Society
Journal Volume
137
Journal Issue
1
Series
J. Electrochem. Soc.
Journal Page Range
82-87
ISSN
0013-4651
CODEN
JESOA

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
21070284
Subject category
S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
BORATES; BORIC ACID; CHROMIUM; ELECTRIC IMPEDANCE; ELECTROCHEMISTRY; MAGNETITE; MORPHOLOGICAL CHANGES; MOTT SCATTERING; PH VALUE; PHOTOCHEMISTRY; SCHOTTKY BARRIER DIODES; SEMICONDUCTOR MATERIALS; SOLID-STATE PLASMA; STEEL-CR19NI10; SURFACE COATING; THIN FILMS
Descriptors DEC
ALLOYS; AUSTENITIC STEELS; BORON COMPOUNDS; CARBON ADDITIONS; CHEMISTRY; CHROMIUM ALLOYS; CHROMIUM-NICKEL STEELS; CORROSION RESISTANT ALLOYS; DEPOSITION; ELASTIC SCATTERING; ELEMENTS; FILMS; HEAT RESISTING ALLOYS; HIGH ALLOY STEELS; HYDROGEN COMPOUNDS; IMPEDANCE; INORGANIC ACIDS; INORGANIC COMPOUNDS; IRON ALLOYS; IRON BASE ALLOYS; IRON ORES; MATERIALS; METALS; MINERALS; NICKEL ALLOYS; ORES; OXIDE MINERALS; OXYGEN COMPOUNDS; PLASMA; SCATTERING; SEMICONDUCTOR DEVICES; SEMICONDUCTOR DIODES; STAINLESS STEELS; STEELS; TRANSITION ELEMENTS