Photoelectrochemical Characterisation of Chromia Scales Thermally Grown on Various Metal Substrates

Yves Wouters; Alain Galerie; Jean Pierre Petit

doi:10.4028/www.scientific.net/MSF.595-598.1181

Paper Titles

Impedance Spectroscopy Applied to Metal Corrosion Study in Silicate Melts
p.1119

Manganese Effect on Isothermal High Temperature Oxidation Behaviour of AISI 304 Stainless Steel
p.1127

In Situ Thermal Gradient Controlled Investigation of Spallation -Experimental Design and Preliminary Results
p.1135

Ternary and Quaternary Interdiffusion in γ (fcc) Fe-Ni-Cr-X (X = Si, Ge) Alloys at 900°C
p.1145

Kinetics of Some Iron-Based Alloys in Industrial CO₂: Formation of Wüstite Phase
p.1153

Cyclic Oxidation Behavior of Sputtered Nanocrystalline Coating with Yttrium Additions in Air
p.1163

Use of the Sessile Drop Method to Understand the Behaviour of Self Healing Ceramic Matrix Composite
p.1173

Photoelectrochemical Characterisation of Chromia Scales Thermally Grown on Various Metal Substrates
p.1181

Effects of Water Vapour on the Oxidation of Chromia Formers
p.1189

HomeMaterials Science ForumMaterials Science Forum Vols. 595-598Photoelectrochemical Characterisation of Chromia...

Photoelectrochemical Characterisation of Chromia Scales Thermally Grown on Various Metal Substrates

Abstract:

Chromia scales grown on several chromia-forming metallic substrates in various conditions were characterised by photoelectrochemistry (PEC), highlighting the presence of two semiconductor phases signed by their respective bandgaps (3.0 and 3.5 eV) with variations of semiconduction type (n, p and insulator, more or less doped). The protective character of the scale was clearly demonstrated when the highest bandgap phase (3.5 eV), identified as the external subscale was close to an insulator.