Influence of molybdenum on the conduction mechanism in passive films on iron–chromium alloys in sulphuric acid solution

• Published in: Electrochimica acta Vol. 46; no. 9; pp. 1339 - 1358
• Main Authors: Bojinov, Martin, Fabricius, Gunilla, Laitinen, Timo, Mäkelä, Kari, Saario, Timo, Sundholm 1, Göran
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.02.2001; Elsevier
• Subjects: Chemistry; Contact electric resistance technique; Electrochemistry; Electrodes: preparations and properties; Exact sciences and technology; General and physical chemistry; Impedance spectroscopy; Ionic and electronic conductivity; Iron–chromium–molybdenum alloys; Kinetic model; Other electrodes; Kinetic model; Contact electric resistance technique; Ionic and electronic conductivity; Impedance spectroscopy; Iron–chromium–molybdenum alloys; Chromium base alloys; Electrode impedance; Electronic properties; Electrode production; Electronic conductivity; Electrolyte solution; Rotating disk electrode; Ionic conductivity; Composition effect; Contact resistance; Voltammetry; Experimental study; Molybdenum base alloys; Electrochemical characteristic; Electrochemical polarization; Electrodissolution; Aqueous solution; Electrode capacity; Electrode potential; Iron base alloys

This paper describes an extension of the mixed-conduction model to predict quantitatively the electrochemical behaviour and transport properties of anodic films on pure Cr, Fe–Cr alloys and Fe–Cr–Mo alloys in 1 M sulphuric acid solution. The anodic films on Fe–Cr–Mo alloys (12 and 25% Cr; 0, 5 and 1...