[en] This work presents the results of studies performed on an eutectoid Zn-Al alloy with small additions of Cu. It is well known that the microstructure and mechanical properties of an alloy depend on its thermal and mechanical history. This alloy was subjected to different heat treatments and rolling at 250 ^oC. The microstructure was analyzed by scanning electron microscopy, the composition of the phases present was specified by microprobe and the phase transformation temperatures were determined by DSC. Mechanical tests, rate-of-corrosion tests with sea water and X-ray diffractometry were also performed. With reference to eutectoid Zn-Al alloys with less Cu, the mechanical resistance increases, the phase transformation temperatures are different and the τ 'phase appears after a longer annealing time (96 hs). The microstructures are characteristic of the thermomechanical treatments performed. The alloy show improved corrosion resistance (3 MPY) (Author)