Aplica？？o de SAM em liga de alumínio AA 2024-T3 com desengraxe alcalino

self-assembly molecules (sam - self assembly monolayer) are corrosion inhibitors, due to their capacity to organize on surfaces, forming thin films. sam presents a high affinity to aluminum oxide. however, the interactions between the oxide layer and sam are not always satisfactory; therefore the oxide formed on the surface presents heterogeneities that hinder sam film formation. the aim of this work was to study the corrosion protection of aluminum aa 2024-t3 associated with sam, after treatment with alkaline degreasing. the electrochemical characterization was carried out by electrochemical impedance spectroscopy and anodic potentiodynamic polarization in na2so4 0,5 mol.l-1 in ph 4,0. the superficial morphology was investigated by optic microscopy. the results showed that sam promoted greater aluminum protection when this was pretreated with degreasing.