Effect of temperature on the stress corrosion cracking of zircaloy-4 in iodine alcoholic solutions

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 ste...

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Bibliographic Details
Published in:Corrosion science 2007-07, Vol.49 (7), p.3112-3117
Main Authors: Gomez Sanchez, A.V., Farina, S.B., Duffó, G.S.
Format: Article
Language:English
Subjects:
A. Zirconium alloy
Applied sciences
C. Intergranular corrosion
C. Stress corrosion
Corrosion
Corrosion environments
Exact sciences and technology
Metals. Metallurgy
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Summary: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.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2007.01.005