Zn-TiO2 nanocomposite thin films were obtained from the occlusion electrodeposition method using pulsed reverse current electrolysis, from acidic zinc sulfate solutions, on a Ti support. According to the glow discharge optical emission spectrometry analysis, the TiO2 nanoparticles are incorporated and uniformly distributed through out the metallic matrix. The 24 h stability of these coatings, in neutral sulfate solutions, has been investigated and compared with the behaviorof the Zn electrodeposits. The stability of the films is strongly dependent on their morphologic and structural characteristics, namely the crystallite size and texture of the matrix. It has been found that a protective layer, mainly composed by Zn4SO4(OH)(6) and ZnSO4, is easily formed on the Zn-TiO2 films than on the Zn electrodeposits. Such protective layer acts as a barrier against further metal dissolution, proved by the solution analysis using atomic absorption spectrophotometry and anodic stripping voltammetry of the solution. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3531949] All rights reserved.