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Untreated tungsten (W), laser-ablated tungsten (LA-W), and a 500 nm tantalum-coated laser-ablated tungsten surface (Ta-LA-W) were therefore immersed in deionized water for up to 28 days. Laser ablation replaced the machined surface with a hierarchical micro\/nanostructure and increased the areal roughness Sa from 0.22 \u00b1 0.01 to 1.75 \u00b1 0.07 \u03bcm; after Ta deposition, Sa was 1.62 \u03bcm. LA-W exhibited the largest topographic attenuation and the highest dissolved W concentration, reaching 7.915 mg\u00b7L\u22121 at 21 days. Ta-LA-W maintained Sa within the range from 1.60 \u00b1 0.06 to 1.66 \u00b1 0.07 \u03bcm and limited dissolved W to 1.118\u20131.601 mg\u00b7L\u22121. X-ray photoelectron spectroscopy showed increased WOx-related intensity and disappearance of the metallic-W loss feature only for untreated W. The W 4f envelopes of LA-W and Ta-LA-W remained broadly similar before and after immersion, but for different reasons: sustained W dissolution for LA-W and suppression of W oxidation and release by the Ta-containing barrier for Ta-LA-W. The dissolution-based corrosion sequence was LA-W &gt; W &gt; Ta-LA-W. Laser texturing therefore acted as an interfacial-engineering treatment rather than an intrinsically corrosion-resistant modification.<\/jats:p>","DOI":"10.3390\/nano16161043","type":"journal-article","created":{"date-parts":[[2026,8,21]],"date-time":"2026-08-21T11:37:34Z","timestamp":1787312254000},"page":"1043","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Laser-Ablated Tungsten as an Interfacial Architecture for Tantalum Coatings: Suppression of Shutdown-Stage Water Corrosion in Accelerator-Driven Neutron-Source Targets"],"prefix":"10.3390","volume":"16","author":[{"given":"Baolong","family":"Ma","sequence":"first","affiliation":[{"name":"School of Nuclear Science and Technology, School of Energy and Power Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"},{"name":"State Industry-Education Integration Center for Medical Innovations, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"},{"name":"XJTU-Huzhou Neutron Science Laboratory, Science Valley Medium-Sized Building #1, Huzhou 313000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shixi","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Nuclear Science and Technology, School of Energy and Power Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"},{"name":"XJTU-Huzhou Neutron Science Laboratory, Science Valley Medium-Sized Building #1, Huzhou 313000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yaru","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Nuclear Science and Technology, School of Energy and Power Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"},{"name":"XJTU-Huzhou Neutron Science Laboratory, Science Valley Medium-Sized Building #1, Huzhou 313000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fanxi","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Nuclear Science and Technology, School of Energy and Power Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"},{"name":"XJTU-Huzhou Neutron Science Laboratory, Science Valley Medium-Sized Building #1, Huzhou 313000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sheng","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Nuclear Science and Technology, School of Energy and Power Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"},{"name":"State Industry-Education Integration Center for Medical Innovations, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"},{"name":"XJTU-Huzhou Neutron Science Laboratory, Science Valley Medium-Sized Building #1, Huzhou 313000, China"},{"name":"HBNCT Co., Ltd., Hangzhou 310000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7227-579X","authenticated-orcid":false,"given":"Yupeng","family":"Xie","sequence":"additional","affiliation":[{"name":"School of Nuclear Science and Technology, School of Energy and Power Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"},{"name":"State Industry-Education Integration Center for Medical Innovations, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"},{"name":"XJTU-Huzhou Neutron Science Laboratory, Science Valley Medium-Sized Building #1, Huzhou 313000, China"},{"name":"National Key Laboratory for High Energy Pulsed Power, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,8,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.physrep.2016.07.007","article-title":"Research opportunities with compact accelerator-driven neutron sources","volume":"654","author":"Anderson","year":"2016","journal-title":"Phys. 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