Abstract
To study the effect of pre-strain on corrosion behavior of pure Zn strip/membranes, the U-bending treatment, immersion and mechanical tests were conducted. The pre-strain accelerated the corrosion rates of both pure Zn strips or membranes with an elevated ratio of 78.02 % (strips), 27.33 % (300 μm), 32.09 % μm/yr (600 μm) and 52.77 % μm/yr (1000 μm). Besides, the finite element simulation results indicated that stress concentration occurred at the maximum deflection sites, leading to the rupture of surface protective layer and formation of micro cracks. Moreover, the applied strain would accelerate the mechanical integrity decay of pure Zn membranes.
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