Mössbauer study of oxide films of Fe-, Sn-, Cr- doped zirconium alloys during corrosion in autoclave

• Published in: Hyperfine interactions 2016-12, Vol.237 (1), p.1-7, Article 67
• Main Authors: Filippov, V. P., Bateev, A. B., Lauer, Yu. A.
• Format: Article
• Language: English
• Subjects: 13-18 September 2015; Atomic; Autoclaves; Casting; Chromium; Condensed Matter Physics; Copper; Corrosion; Corrosion resistance; Corrosion resistant alloys; Germany; Hadrons; Hamburg; Heavy Ions; Inclusions; Iron; Iron compounds; Molecular; Nuclear Physics; Optical and Plasma Physics; Oxide coatings; Physics; Physics and Astronomy; Precipitates; Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME 2015); Reaction kinetics; Surfaces and Interfaces; Thin Films; Tin base alloys; Zirconium alloys; Zirconium base alloys; Zirconium oxides
• ISSN: 0304-3843; 1572-9540
• DOI: 10.1007/s10751-016-1254-0

Mössbauer investigations were used to compare iron atom states in oxide films of binary Zr-Fe, ternary Zr-Fe-Cu and quaternary Zr-Fe-Cr-Sn alloys. Oxide films are received in an autoclave at a temperature of 350–360 °C and at pressure of 16.8 MPa. The corrosion process decomposes the intermetallic precipitates in alloys and forms metallic iron with inclusions of chromium atoms α –Fe(Cr), α –Fe(Cu), α –Fe 2 O 3 and Fe 3 O 4 compounds. Some iron ions are formed in divalent and in trivalent paramagnetic states. The additional doping influences on corrosion kinetics and concentration of iron compounds and phases formed in oxide films. It was shown the correlation between concentration of iron in different chemical states and corrosion resistance of alloys.