Abstract
The unusual appearance of corrosion products on inner surfaces of copper water pipes from a large public facility in Melbourne led to this investigation. There was a thick coating of copper oxides across the surface, with black bands extending around the circumference of the pipe at fairly regular intervals. This was investigated using micro X-ray diffraction, giving information on the distribution of crystalline materials across the inner pipe surfaces with spatial resolution down to approximately 200 microns.
The study revealed that the appearance of banding was related to differing distributions of cuprite and tenorite in the corrosion products, and that the regularity of this banding was associated with preferred crystallographic orientation phenomena in the copper matrix. Potential causes of regular variations in crystallographic preferred orientation in copper pipes under certain drawing conditions are discussed, as is the epitaxial growth of copper oxide films on ordered copper surfaces.
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Hay, D., O’Halloran, R., Wright, N. (2013). Investigation of Unusual “Sharkskin” Corrosion in Drawn Copper Pipes. In: Marquis, F. (eds) Proceedings of the 8th Pacific Rim International Congress on Advanced Materials and Processing. Springer, Cham. https://doi.org/10.1007/978-3-319-48764-9_313
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DOI: https://doi.org/10.1007/978-3-319-48764-9_313
Publisher Name: Springer, Cham
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