Abstract
ABSTRACT Compact and dense zirconium coatings with silvery-white metallic luster were deposited on the surfaces of alloy ZIRLO under different duty cycles of 20%, 50% and 80% by pulse electro-deposition (PED) method in FLiNaK molten salt at 1023 K. The characteristics of the Zr coatings were investigated by SEM, EDS and XRD. The iodine-induced stress corrosion cracking(I-SCC) behavior of the Zr-coated alloy ZIRLO was investigated using slow strain rate tensile (SSRT) tests. The results showed that as the duty cycle increased from 20% to 80%, the average grain size of zirconium deposits increased but current efficiency decreased progressively. All of the Zr-coated samples improve the ultimate tensile strength and ductility in iodized butanol solution with respect to the uncoated Zr. The sample with Zr coating of 50% duty cycle has the highest ultimate tensile strength and ductility during the SSRT test in iodized butanol solution.
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