The corrosion of unaged and 7000-h thermally aged 308L stainless steel weld metals in simulated PWR primary water under aerated and deaerated conditions was investigated,involving the corrosion of austenite,δ-ferrite and δ-ferrite/austenite phase boundary.The results revealed that thermal ageing for 7000 h had a limited effect on the corrosion behavior of 308L weld metal as it only increased the inner oxide thickness of δ-ferrite slightly under the deaerated condition.No obvious corrosion enhance-ment of 308L weld metal under the aerated condition was found compared to the deaerated condition regardless of the thermal ageing.Nevertheless,Cr-enrichment on the surface of oxide particles,dissolved regions at the metal/oxide interface and localized corrosion along the δ-ferrite/austenite phase boundary occurred under the aerated condition.

Xiaodong Lin;Qunjia Peng;Yaolei Han;En-Hou Han;Wei Ke

Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;Institute of Materials,Shanghai University,Shanghai 200072,China;Suzhou Nuclear Power Research Institute,Suzhou 215004,China

材料科学技术（英文版）

[1]Xiaodong Lin;Qunjia Peng;Yaolei Han;En-Hou Han;Wei Ke-.Effect of thermal ageing and dissolved gas on corrosion of 308L stainless steel weld metal in simulated PWR primary water)[J].材料科学技术（英文版）,2022(01):308-324

308L,unaged,deaerated

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