Characterization and micro- and ultra-structural analysis of PET-based Co-rolled composite electrolytic chromium coated steel (ECCS)

The production of thin metal–polymer plates looks for the proper combination of good mechanical properties and resistance to degradation against aggressive external media. However, in this regard it is important to satisfy structural aspects, surface conditions and interface characteristics of the metal substrates as well as those of the protective polymer. Characterization and performance evaluations of the metal–polymer protective substrates, composed by a steel plate coated with electrolytic chromium (ECCS) and surface-protected by a polyethylene teraftalate (PET) co-rolled layer, were carried out by SEM, TEM, SFET and EDAX microanalyses. The chemical composition and morphology of the components that allow for a good adherence of the metal–polymer plate were studied at the interface level. The knowledge of this composite is important to understand and improve the assemblies of the substrates.