Oxidation Resistance and Stress Corrosion Cracking Susceptibility of 308L and 309L Stainless Steel Cladding Layers in Simulated Pressurized Water Reactor Primary Water

被引：9

作者：

Cui, Tongming ^{[1
]}

Xiong, Qi ^{[1
]}

Ma, Jiarong ^{[1
]}

Zhang, Kun ^{[1
]}

Lu, Zhanpeng ^{[1
]}

Chen, Junjie ^{[1
]}

Jia, Yibo ^{[1
]}

Zheng, Hui ^{[2
]}

Yang, Shuangliang ^{[2
]}

Zhong, Zhimin ^{[2
]}

Lozano-Perez, Sergio ^{[3
]}

Shoji, Tetsuo ^{[4
]}

机构：

[1] Shanghai Univ, Sch Mat Sci & Engn, Inst Mat, 149 Yanchang Rd, Shanghai 200072, Peoples R China

[2] State Nucl Power Plant Serv Co, 888 Tianlin Rd, Shanghai 200233, Peoples R China

[3] Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England

[4] Tohoku Univ, New Ind Creat Hatchery Ctr, Sendai, Miyagi 9808579, Japan

来源：

CORROSION | 2021年 / 77卷 / 08期

基金：

国家重点研发计划;

关键词：

ferrite; inclusions; oxidation; oxide film; pressurized water reactor; stainless steel cladding; PWR PRIMARY WATER; NICKEL-ALLOYS; MICROSTRUCTURAL CHARACTERIZATION; DISSOLVED HYDROGEN; YIELD STRENGTH; OXIDE-FILMS; SAFE-END; WELD; PREDICTION; DIFFUSION;

D O I：

10.5006/3699

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Exposure and slow strain rate tensile tests were conducted in a simulated pressurized water reactor (PWR) primary water to investigate the oxidation resistance and stress corrosion cracking (SCC) susceptibility of 308L and 309L stainless steel (SS) cladding layers. A double-layer structure oxide layer grown on 308L SS and 309L SS contained the Cr-enriched nanocrystalline internal layer and the Fe-enriched spinel oxide in the external layer. Ni-enrichment at the matrix/oxide boundary was observed. The internal oxide film on 309L SS was thicker and had a lower Cr content than that on 308L SS. Preferential dissolution of inclusions led to pits on 308L SS and 309L SS surfaces during the exposure tests. More inclusions in 309L would decrease its SCC resistance due to the pits' ability to act as the SCC initiation site. 308L SS had a lower susceptibility to SCC than 309L SS in PWR primary water. Lower ferrite content and higher strength/hardness reduced the oxidation and SCC resistance of 309L SS cladding. The effect of ferrite on oxidation and SCC of the SS claddings is discussed.

引用

页码：878 / 895

页数：18

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