This paper measures the geometry and the amount of corrosion of a steel bar using different methods: mass loss, calipers, drainage measurements, 3D scanning, and X-ray micro-computed tomography (XCT).
Li, D., Li, P., Du, Y., Wei, R. Applicability Analysis of Assessment Methods for Morphological Parameters of Corroded Steel Bars. J. Vis. Exp. (141), e57859, doi:10.3791/57859 (2018).