Effect of the plastic deformation on the electrochemical behavior of metal coated steel sheets

An electrochemical study on deformed galvanneal steel sheets

“…2-5). A similar trend is observed by the previous authors [2]. The following characteristics of the anodic polarization become evident on examination.…”

“…[3][4][5]. The study by Sacco et al [2] shows similar results, i.e. when the deformed (1.3% and 12.5%) hot dip galvanized coating was immersed in 3.5 wt.% NaCl it did not exhibit any increase in the anodic current density.…”

“…Literature published on the effect of deformation on corrosion behavior of the galvanized coatings is limited. Sacco et.al, who carried out polarization resistance studies of uniaxially deformed galvanized steel, showed an increase in the corrosion rate with an increase in the degree of deformation [2]. This effect was related to an increase in the actual surface area of the coating and the activation of the cathodic reaction because of galvanic coupling between the coating and the exposed steel substrate.…”

Effect of deformation on the electrochemical behavior of hot-dip galvanized steel sheets

“…Sacco et al, who carried out polarization resistance studies of uniaxially deformed galvanized steel, observed a slight increase in the corrosion rate of zinc with an increase in the degree of deformation [4]. Also, a few research groups have studied the forming behavior of coated steel sheets [5][6][7].…”

Effect of zinc crystals size on galvanized steel deformation and electrochemical behavior

“…[11][12][13][14][15][16] ; also that information related with the formability effect on the corrosion behavior of galvanized coatings is limited. In this sense, from polarization resistance studies of uniaxally deformed galvanized steel, a slight increase of the zinc corrosion rate occurs as a function of the deformation degree 17 . It was also demonstrated that the loss in the hot-dip galvanized steel during its formability is high in biaxial mode, intermediate in plain strain mode, less in uniaxial and tensile modes of deformation, and that even in most deformed substrate the galvanic potential value is so negative as to prevent its corrosion 18,19 .…”