Coupling Effect of Precipitates and Hydrogen on Pitting Corrosion of Stainless Steel
Source abstract
Abstract
This study investigated the coupling effect of hydrogen and precipitates on the initiation of pitting using HR3C stainless steel with large NbCrN precipitates as the study material. Stainless steel exhibited good resistance to pitting when not subject to hydrogen charging. Hydrogen charging significantly reduced the corrosion resistance and stability of the passive film. Results obtained using the hydrogen microprint technique revealed that hydrogen was enriched within NbCrN precipitates and along the precipitate/substrate interface. Through immersion experiments, we discovered that pits preferentially initiated at the precipitate/substrate interface because they had weaker corrosion resistance than the precipitates.
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Research context
OpenAlex topics: Hydrogen embrittlement and corrosion behaviors in metals · Corrosion Behavior and Inhibition · Non-Destructive Testing Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
*State Key Laboratory of Nuclear Power Safety Technology and Equipment, University of Science and Technology Beijing, Beijing, 100083, China.
**Institute for Advanced Materials and Technology, University of Science and Technology Beijing, 100083, China.
***State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials, Tubular Goods Research Institute of CNPC, Xi’an, 710077, China.
****Key Laboratory of Petroleum Tubular Goods and Equipment Quality Safety for State Market Regulation, Xi’an, 710077, China.
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