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Corrosão e Protecção de Materiais

versão On-line ISSN 2182-6587

Resumo

DIAMANTINO, T. C. et al. Paint systems for marine structures. Corros. Prot. Mater. [online]. 2014, vol.33, n.3, pp.44-50. ISSN 2182-6587.

The increase of aluminum alloys applications registered some decades ago for marine constructions has led to a considerable number of cases of structure damages mainly due to corrosion problems. So, the use of aluminum alloys for these constructions implies a suitable anticorrosive protection. The immersed structures like ship hulls need to be kept free from marine organisms in order to minimize drag resistance and reduce fuel consumption. Antifouling paints (AFP) are applied and developed to avoid the micro and macrofouling. A great development of AFP has been registered aiming for a better efficiency in compliance with emerging environmental legislation. The main aim of this study was to evaluate the anticorrosive behaviour and antifouling efficiency of three different paint systems that include antifouling paints with different biocides. With this purpose tests were carried out including artificial ageing (salt spray resistance, immersion resistance and cathodic disbonding) and natural exposure during two years. All this paint systems were evaluated in terms of visual assessment, thickness, and morphological and chemical characterization by Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM/EDS), Fourier Transform Infrared Absorption Spectroscopy (FTIR) and X-Ray Diffraction (XRD). Finally the actual research lines on antifouling technologies are pointed.

Palavras-chave : Anticorrosive Protection; Antifouling Paints; Marine Paints; Fouling.

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