X-ray microtomography studies of localised corrosion and transitions to stress corrosion cracking

B.J. Connolly (1) , D. Horner (1) , S.J. Fox (1) , A.J. Davenport (1) , C. Padovani (1) , S. Zhou (2) , A. Turnbull (2) , M. Preuss (3) , N.P. Stevens (3) , T.J Marrow (3) , Jean-Yves Buffiere (4) , E. Boller (5) , A. Groso (6) , M. Stampanoni (6)

1 School of Metallurgy and Materials
2 NPL - National Physical Laboratory [Teddington]
3 School of Materials [Manchester]
4 MATEIS - Matériaux, ingénierie et science [Villeurbanne]
5 ESRF - European Synchrotron Radiation Facility
6 SLS-PSI - The Swiss Light Source (SLS)

Two forms of high resolution X-ray tomographic experiments (i.e. synchrotron based X-ray microtomography and desktop microfocus computed X-ray tomography) are demonstrated in the present paper to illustrate the wide application of these techniques for qualitative and quantitative studies of localised corrosion and environmentally assisted cracking. Specifically, synchrotron based X-ray tomography was used to investigate the localised corrosion morphology within aluminium specimens when exposed in situ to a chloride environment while microfocus computed X-ray tomography was used to investigate the morphology and quantify the transition from localised corrosion to stress corrosion cracking in steel specimens exposed ex situ to a simulated corrosive condensate environment.

Domaines: Mécanique des matériaux [physics.class-ph]

B.J. Connolly, D. Horner, S.J. Fox, A.J. Davenport, C. Padovani, et al.. X-ray microtomography studies of localised corrosion and transitions to stress corrosion cracking. Materials Science and Technology, 2006, 22 (9), pp.1076-1085. ⟨10.1179/174328406X114199⟩. ⟨hal-00436212⟩