Effect of Salt Composition and Microstructure on Stress Corrosion Cracking of 316L Austenitic Stainless Steel for Dry Storage Canisters

被引：24
作者：
Dong, P. [1 ,2 ]
Scatigno, G. G. [3 ]
Wenman, M. R. [1 ,2 ]
机构：
[1] Imperial Coll London, Dept Mat, London SW7 2AZ, England
[2] Imperial Coll London, Ctr Nucl Engn, London SW7 2AZ, England
[3] EDF, Gloucester GL4 3RS, England
来源：
JOURNAL OF NUCLEAR MATERIALS | 2021年 / 545卷
基金：
英国工程与自然科学研究理事会;
关键词：
Stress Corrosion Cracking; Austenitic Stainless Steel; 316L Weld; Dry Storage Canister; Trangranular SCC; Chloride; CONCRETE CASK STORAGE; PITTING CORROSION; CHLORIDE; 304L; BEHAVIOR; STRAIN; DEPOSITION; INITIATION; SULFATE; NITRATE;
D O I：
10.1016/j.jnucmat.2020.152572
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The atmospheric SCC/pitting susceptibility of deposited MgCl2, synthetic sea-salt and site-specific sea-salt (containing ammonium and nitrate ions) on weld, HAZ and base 316L canister material was investigated. Higher SCC/pitting densities were observed for the HAZ region exposed to MgCl2, due to higher tensile residual stresses and plastic strains. Pitting in the weld region exposed to MgCl2 show preferential corrosion of delta-ferrite. Salt composition appears to have had a significant impact on SCC, pitting density and surface corrosion behaviour. Maximum surface crack propagation rates in the HAZ of 4 x 10(-11) ms(-1) were obtained for both synthetic sea-salt and MgCl2. (C) 2020 Published by Elsevier B.V.
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页数：18
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