REIS, FERNANDO M. dosMELO, HERCILIO G. deCOSTA, ISOLDA2014-07-152014-07-302014-07-152014-07-302006REIS, FERNANDO M. dos; MELO, HERCILIO G. de; COSTA, ISOLDA. EIS investigation on Al 5052 alloy surface preparation for self-assembling monolayer. <b>Electrochimica Acta</b>, v. 51, p. p. 1780-1788, 2006. DOI: <a href="https://dx.doi.org/10.1016/j.electacta.2005.02.118">10.1016/j.electacta.2005.02.118</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/5396.0013-4686http://repositorio.ipen.br/handle/123456789/5396Environmental restrictions are leading to the research for environmentally friendly Cr-free treatments to substitute chromatizing. Recently, promising results have being reported for the corrosion protection offered by self-assembly monolayer (SAM) on different metals. In the present work, the influence of surface preparation on the electrochemical behaviour of SAM-treated Al 5052 alloy in naturally aerated 0.5 M Na2SO4 solution (pH 4) has been investigated using EIS. The effects of three different surface treatments were compared: (A) alkaline cleaning; (B) alkaline cleaning followed by SAM treatment; (C) alkaline cleaning followed by acid etching and then SAM treatment. The results indicate that the acid-etching step, carried out after cleaning had a favourable effect on the corrosion behaviour of the Al 5052 alloy when it is subsequently treated with SAM process.p. 1780-1788openAccessaluminium alloyscorrosion resistancesurface treatmentsArtigo de periódico5110.1016/j.electacta.2005.02.118https://orcid.org/0000-0002-4987-3334