Unexpected pitting inhibition of additively-manufactured austenitic stainless steel by electrochemical hydrogen-charging

被引：0
|
作者：
Wang, Mingyang [1 ]
Tian, Xingda [1 ]
Liu, Yong [2 ]
Ding, Zhiyi [1 ]
Hou, Juan [1 ]
Chen, Aiying [1 ]
机构：
[1] Univ Shanghai Sci & Technol, Sch Mat & Chem, Shanghai 200093, Peoples R China
[2] Nanchang Univ, Key Lab Light Weight & High Strength Struct Mat Ji, Nanchang 330031, Peoples R China
来源：
CORROSION SCIENCE | 2025年 / 243卷
基金：
中国国家自然科学基金;
关键词：
Austenitic stainless steel; Selective laser melting; Hydrogen-charging; Microstructure; Pitting; CORROSION-RESISTANCE; BEHAVIOR; CHLORIDE; MICROSTRUCTURE; DEFORMATION; PROPAGATION; MARTENSITE;
D O I：
10.1016/j.corsci.2024.112598
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Pitting of austenitic stainless steel (SS) is intensified under hydrogen environment, resulting in great uncertainty of safety. However, austenitic SS printed by selective laser melting (SLM) after electrochemical hydrogencharging manifests an unanticipatedly anti-pitting behavior. Pitting resistance is found in all the SLM samples after H-charging, while the original SLM and all the commercial SS samples are composed of corrosive pits on the surfaces. XRD, EBSD and TEM observations of SLM sample after H-charging reveal that nanotwins and epsilon-phase are newly formed interior of the cellular cells, which inhibit martensite transformation and enhance the formation of Cr oxides in passivation film.
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页数：11
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