Characterization of corrosion and scaling products with portable X-ray diffraction

Burkett, Dane; Olympus Imaging Australia Pty Ltd; Australia

Burkett, D.A.; Olympus Scientific Solutions; Australia

ID: ECNDT-0164-2018

To prevent the threats posed by corrosion and scaling to pipelines, refineries, mining processes, and other infrastructure, it is important to develop effective corrosion management strategies. A key part of such a program is the rapid identification of the corrosion and scaling products on-site, so that the appropriate controls are implemented. X-ray diffraction (XRD) has long been the standard for phase identification of corrosion and scaling products. Owing to capital costs, environmental requirements, and significant sample preparation, XRD instruments are typically restricted to laboratories or research institutes and generally not deployed on-site. As a result, it can take weeks for samples to be analyzed, ultimately delaying the understanding of the corrosion or scaling and therefore the appropriate corrosion management strategy. Recent advances in XRD sample holders and X-ray sources have allowed for the development of portable XRD (pXRD) devices where the sample preparation is simpler and does not require regular calibration by a technical expert. This allows for the rapid acquisition of XRD data, enabling corrosion information to be obtained in minutes. This data can then be provided to the corrosion engineer, on- or off-site, to help characterize the deterioration process and determine the most effective corrosion management strategy. This paper provides case studies from a range of applications where pXRD is used to aid the corrosion engineer.