稀土氧化物对Ti6Al4V合金表面渗渗层电化学性能的影响

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS Surface & Coatings Technology Pub Date : 2025-05-01 Epub Date: 2025-03-03 DOI:10.1016/j.surfcoat.2025.131997

Nianqiang Li , Zikun Tang , Yonghua Duan , Zhiqi Feng , Lishi Ma , Shanju Zheng , Mingjun Peng , Mengnie Li

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引用次数: 0

摘要

采用固态扩散法制备了Ti6Al4V钛合金表面的稀土氧化物硼化层和硼铝化复合层。研究了涂层在3.5 wt% NaCl和5.0 vol% H2SO4溶液中的腐蚀行为和机理，重点研究了不同稀土氧化物对涂层腐蚀的影响。结果表明，与未经处理的Ti6Al4V相比，处理后的样品表现出更稳定的析氢和均匀的腐蚀速率，形成保护产物层，增强了耐腐蚀性。其中，TmB样品在两种溶液中表现出最好的电化学性能，因为Tm2O3促进了更厚的TiB2层的形成，通过阻止离子渗透和降低衬底活性提供了优异的电阻。由于残余Al3Ti的存在，硼铝复合层的效果略差，但结合了TiB2和铝相的性能，提供了双重保护，提高了合金的耐腐蚀性。

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Effect of rare earth oxides on electrochemical properties of infiltration layer on Ti6Al4V alloy surface

Rare earth oxides borided as well as boron-aluminized composite layers were prepared on Ti6Al4V titanium alloy using a solid-state diffusion method. The corrosion behavior and mechanisms of the coatings were studied in 3.5 wt% NaCl and 5.0 vol% H₂SO₄ solutions, with a focus on the effects of different rare earth oxides. Results showed that treated samples exhibited more stable hydrogen evolution and uniform corrosion rates compared to untreated Ti6Al4V, forming a protective product layer that enhanced corrosion resistance. Among them, the TmB sample showed the best electrochemical performance in both solutions, as Tm₂O₃ promoted the formation of a thicker TiB₂ layer, providing excellent resistance by blocking ion penetration and reducing substrate activity. The boron-aluminized composite layer, while slightly less effective due to residual Al₃Ti, provided dual protection by combining the properties of TiB₂ and aluminum phases, improving the alloy's resistance to corrosion.

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.