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Recent excavations in southern Jordan have reveuled the largest Early Bronze Age (c. 3600-2000 BC) metal manufactory in the ancient Near East. On-site Geographic Information Sysferns (GIs) antrlyses of the finds provide new evidence concerning the scale and organization of metal production nt n time when ttiefirst cities emerged in this part of the Near East. Materials and lead isotope analyses of the metallurgical finds provide important data for reconstructing ancient metal processing and for identijjing trade networks.

Abstract:In this paper we demonstrate that optical coherence tomography (OCT) is a powerful tool for the non-destructive investigation of transparent coatings on metal substrates. We show that OCT provides additional information which the common practice electrical impedance spectroscopy (EIS) cannot supply. First, coating layer thicknesses were measured and compared with reference measurements using a magnetic inductive (MI) measurement technique. After this validation of the OCT measurements, a customized sectioned sample was created to test the possibility to measure coating thicknesses with underlying corrosion, which cannot be analyzed accurately by MI or EIS measurements. Finally, we demonstrate the benefit of OCT on a standard sample. The OCT measurements provide the correct coating layer thickness with high lateral resolution and even enable metal and corrosion layers to be distinguished from each other.

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