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Open AccessArticle

Surface and Microstructural Failures of PET-Coated ECCS Plates by Salmon-Polymer Interaction

Institute of Materials, Chemistry and Food Science, University Austral of Chile, Valdivia 5111187, Chile
Department of Condensed Matter Physics, University of Valladolid, Valladolid 47002, Spain
Author to whom correspondence should be addressed.
Academic Editors: Vineet V. Joshi and Alan Meier
Metals 2016, 6(3), 59;
Received: 17 January 2016 / Revised: 27 February 2016 / Accepted: 29 February 2016 / Published: 11 March 2016
(This article belongs to the Special Issue Oxidation of Metals)
The new types of knowledge-intensive, multilayer containers consist of steel plates protected against corrosion by nanometric electrolytic chromium (Cr0) and chromium oxide (Cr2O3) layers chemically bonded to polyethylene terephthalate (PET) polymer coating to preserve food. It was observed that after emptying the cans, the salmon adhered to the polymer coating, changing its color, and that this adhesion increased with longer storage times. This work was aimed at determining the product-container interactions and their characterization by X-ray diffraction (XRD), confocal Raman and micro-Raman imaging and scanning electron microscopy (SEM) analysis. The zones of adhesion showed surface changes, variations in crystallinity and microstructural degradation of the PET coating. In addition, localized damages altering the functional properties of the multilayer system were observed as microcracking in the chromium layers that protect the steel. The degradation undergone was evaluated and characterized at a surface and microstructural level to establish the failure mechanisms, which were mainly associated with the activity of the adhered muscle and its biochemical components. Finally, a recommendation is done to preserve the useful life and functionality of cans for the preservation and efficient use of resources with an impact on recycling and environmental conservancy. View Full-Text
Keywords: salmon; packaging; metal-polymer; layers; failure diagnostics; characterization salmon; packaging; metal-polymer; layers; failure diagnostics; characterization
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MDPI and ACS Style

Zumelzu, E.; Wehrhahn, M.J.; Rull, F.; Pesenti, H.; Sanz-Arranz, A.; Ugarte, R. Surface and Microstructural Failures of PET-Coated ECCS Plates by Salmon-Polymer Interaction. Metals 2016, 6, 59.

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