Effects of duty cycle on microstructure and iodine-induced stress corrosion cracking behavior of pulse electro-deposited zirconium coating. Issue 5 (4th May 2022)

• Record Type: Journal Article
• Authors: Li, Yusha; Zhang, Yingchun; Li, Guangbin; Dong, Xiaoxu; Wang, Ying; Gu, Zongxing
• Is Part Of: Journal of nuclear science and technology. Volume 59:Issue 5(2022)
• Page Start: 564
• Page End: 572
• Publication Date: 2022-05-04
• Subjects: Zirconium coating -- pulse electro-deposition method -- iodine-induced stress corrosion cracking -- duty cycle; Nuclear engineering -- Periodicals; Nuclear physics -- Periodicals; Nuclear energy -- Periodicals; 621.4805
• DOI: 10.1080/00223131.2021.1989340
• Languages: English
• ISSNs: 0022-3131

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.