Effect of temperature on the stress corrosion cracking of zircaloy-4 in iodine alcoholic solutions |
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Authors: | A.V. Gomez Sanchez,G.S. Duffó |
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Affiliation: | a Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Gral. Paz 1499, (1650) San Martín, Buenos Aires, Argentina b Comisión Nacional de Energía Atómica, Departamento de Materiales, Av. Gral. Paz 1499, (1650) San Martín, Buenos Aires, Argentina |
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Abstract: | Zircaloy-4 is susceptible to stress corrosion cracking (SCC) in solutions of iodine dissolved in different alcohols (methanol, ethanol, 1-propanol, 1-butanol, 1-pentanol and 1-octanol). The crack propagation rate is known to decrease as the solvent molecular weight increases, as a consequence of steric hindrance. However, the mechanism that operates during SCC is still unknown. In the present work the effect of temperature on SCC susceptibility was evaluated in 1-butanol and 1-pentanol iodine containing solutions. The dependence of the crack growth rate with temperature follows an Arrhenius law, and the activation energy obtained from experimental data is consistent with a process controlled by volume diffusion of the active species (the iodine-alcohol complex) to the crack tip. |
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Keywords: | A. Zirconium alloy C. Stress corrosion C. Intergranular corrosion |
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