Effect of strain energy on corrosion behavior of ultrafine grained copper prepared by severe plastic deformation

Effect of strain energy on corrosion behavior ultrafine-grained (UFG) copper prepared by severe plastic deformation (SPD) was investigated in terms microstructural evolution. The SPD processed material showed an structure after grain refinement for several time processes, which will affect mechanical and Homogeneity can be obtained efficiently through the pressing process commonly known as simple shear extrusion (SSE), is one techniques. Pure SSE two, four, eight, twelve passes. treated sample observed laser microscope transmission electron well X-ray diffraction. potentiodynamic polarization curve modified Livingstone solution, 1 M NaCl, sulphuric solution. that first pass displayed large developing elongated sub-grain structure. By increasing number, shape became equiaxed due to excessive strain. broadening related sample, leading smaller crystallite size, higher microstrain, dislocation density. More homogeneous passive film developed with UFG appearance. However, current density NaCl decreased increment number dissolution metal. has more boundaries than coarse structure, these phenomena show why Cu dissolve ability influences boundary behaves cathodic site.