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在尿素水溶液中通过电解等离子体对AISI 304不锈钢进行抛光：对表面改性和耐腐蚀性的影响。

Polishing of AISI 304 SS by Electrolytic Plasma in Aqueous Urea Solution: Effect on Surface Modification and Corrosion Resistance.

作者信息

Pérez-Durán Hugo, Martínez-Baltodano Francisco, Vargas-Gutiérrez Gregorio

机构信息

Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Unidad Saltillo, Ramos Arizpe 25900, Mexico.

出版信息

Materials (Basel). 2025 Aug 12;18(16):3786. doi: 10.3390/ma18163786.

DOI:10.3390/ma18163786
PMID:40870102
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12387136/
Abstract

Plasma Electrolytic Polishing (PEP) is an advanced anodic process that enhances stainless steel surfaces through controlled electrochemical dissolution and plasma-mediated modification. This study demonstrates that PEP treatment of AISI 304 SS at 300 V in aqueous urea solution (3.0 wt.%)/NHNO (0.25 wt.%) achieves remarkable improvements: surface roughness decreases by 54.6% (from 0.197 ± 0.023 μm to 0.0895 ± 0.0205 μm) with minimal mass loss (0.0035 g·cm) in just 20 min. Tafel analysis showed a 99% reduction in corrosion rate (0.00497 mm yr) compared to untreated AISI 304 SS (0.094 mm yr). Cyclic Potentiodynamic Polarization (CPDP) measurements indicated superior pitting resistance (E = +0.423 vs. +0.486 V for PEP processing). XPS analysis elucidates the underlying mechanisms, showing a 91% increase in the Cr/Fe ratio (0.44 to 0.84) and complete transformation of surface oxides to protective CrO (57.34 wt.%) and FeO (55.88 wt.%), which collectively explain the enhanced corrosion resistance.

摘要

等离子体电解抛光（PEP）是一种先进的阳极处理工艺，通过可控的电化学溶解和等离子体介导的改性来改善不锈钢表面。本研究表明，在尿素水溶液（3.0 wt.%）/NHNO（0.25 wt.%）中于300 V对AISI 304不锈钢进行PEP处理可实现显著改善：表面粗糙度降低54.6%（从0.197±0.023μm降至0.0895±0.0205μm），且在仅20分钟内质量损失极小（0.0035 g·cm）。塔菲尔分析表明，与未处理的AISI 304不锈钢（0.094 mm/yr）相比，腐蚀速率降低了99%（0.00497 mm/yr）。循环动电位极化（CPDP）测量表明耐点蚀性能优异（PEP处理的E为+0.423 V，未处理的为+0.486 V）。XPS分析阐明了其潜在机制，表明Cr/Fe比增加了91%（从0.44增至0.84），并且表面氧化物完全转变为保护性的CrO（57.34 wt.%）和FeO（55.88 wt.%），这些共同解释了耐腐蚀性的增强。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/a31c9380ee5d/materials-18-03786-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/7fcaa8fbfbbd/materials-18-03786-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/2ddcaf114aeb/materials-18-03786-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/3fd777631187/materials-18-03786-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/5b2f3eb642b6/materials-18-03786-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/60439b739e91/materials-18-03786-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/f05461ddfe00/materials-18-03786-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/e29329a989d5/materials-18-03786-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/9a6217613496/materials-18-03786-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/a31c9380ee5d/materials-18-03786-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/7fcaa8fbfbbd/materials-18-03786-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/2ddcaf114aeb/materials-18-03786-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/3fd777631187/materials-18-03786-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/5b2f3eb642b6/materials-18-03786-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/60439b739e91/materials-18-03786-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/f05461ddfe00/materials-18-03786-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/e29329a989d5/materials-18-03786-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/9a6217613496/materials-18-03786-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b0f5/12387136/a31c9380ee5d/materials-18-03786-g009.jpg

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本文引用的文献

1
Effect of the gas layer evolution on electrolytic plasma polishing of stainless steel.气体层演变对不锈钢电解等离子体抛光的影响。
Sci Rep. 2024 Sep 27;14(1):22099. doi: 10.1038/s41598-024-74263-1.
2
Plasma Electrolytic Polishing-An Ecological Way for Increased Corrosion Resistance in Austenitic Stainless Steels.等离子体电解抛光——提高奥氏体不锈钢耐腐蚀性的生态方法。
Materials (Basel). 2022 Jun 14;15(12):4223. doi: 10.3390/ma15124223.
3
Effect of Polishing on Electrochemical Behavior and Passive Layer Composition of Different Stainless Steels.
抛光对不同不锈钢电化学行为及钝化膜成分的影响
Materials (Basel). 2020 Aug 1;13(15):3402. doi: 10.3390/ma13153402.