Fig. 3From: Long-term corrosion of copper alloys in the soil: new aspects of corrosion morphology in archaeological vessels from south-western IranOptical and SEM-BSE micrographs of three samples of the M1 morphology with very thin internal smooth patina (layers A and B) and some thin external corrosion layers (C and D). The limit of the original surface (OS) is obviously visibleBack to article page