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inside Corrosion

Correlative tomography is a new concept for characterising materials.

Correlative tomography is in essence the extension of correlative imaging into three dimensions. The concept uses a workflow to connect multiple imaging and analytical capabilities to extract information from the same 3D volume. This approach also provides a multiscale framework allowing understanding of the specimen from the macro to the nano scale.

Correlative tomography has already been successfully applied to critical problems facing stainless steel components in the energy sector. Firstly pitting corrosion of a pipeline used in sub-sea applications and secondly creep cavitation in power station steam header. In both cases a new insight into these degradation processes was found.

Work is continuing within the Henry Mosley X-Ray Imaging Facility to establish workflows that connect X-ray computed tomography to other imaging and analysis capabilities, for example scanning electron microscopy (SEM and transmission electron microscopy (TEM). The effective correlation of information from these different tools provides the best insight possible to the material.


T. L. Burnett, S. A. McDonald, et al. (2014). Correlative Tomography. Scientific Reports 4, Article number: 4711 doi:10.1038/srep04711
T. L. Burnett, R. Geurts, et al. (2015) Multiscale 3D analysis of creep cavities in AISI type 316 stainless steel. Materials Science and Technology 31,5: 522-534 doi:10.1179/1743284714Y.0000000639