Electrochemical Hydrogen Charging on Corrosion Behavior of Ti-6Al-4V Alloy in Artificial Seawater

• Published in: Chinese journal of mechanical engineering 2024-01, Vol.37 (1), p.2-13, Article 2
• Main Authors: Qiao, Yanxin, Qin, Yue, Zhou, Huiling, Yang, Lanlan, Wang, Xiaojing, Wang, Zhengbin, Liu, Zhenguang, Zou, Jiasheng
• Format: Article
• Language: English
• Subjects: Corrosion resistance; Corrosion resistant alloys; Electrical Machines and Networks; Electrochemical analysis; Electrochemical corrosion; Electrodes; Electronics and Microelectronics; Engineering; Engineering Thermodynamics; Experiments; Heat and Mass Transfer; Hydrogen; Hydrogen charging; Instrumentation; Machines; Manufacturing; Mechanical Engineering; Original Article; Passive film; Power Electronics; Processes; Seawater; Smart Material; Spectrum analysis; Stainless steel; Surface properties; Theoretical and Applied Mechanics; Ti-6Al-4V alloy; Titanium alloys; Titanium base alloys; Work stations
• ISSN: 2192-8258; 1000-9345; 2192-8258
• DOI: 10.1186/s10033-023-00983-6

This study employs advanced electrochemical and surface characterization techniques to investigate the impact of electrochemical hydrogen charging on the corrosion behavior and surface film of the Ti-6Al-4V alloy. The findings revealed the formation of γ-TiH and δ-TiH 2 hydrides in the alloy after hydrogen charging. Prolonging hydrogen charging resulted in more significant degradation of the alloy microstructure, leading to deteriorated protectiveness of the surface film. This trend was further confirmed by the electrochemical measurements, which showed that the corrosion resistance of the alloy progressively worsened as the hydrogen charging time was increased. Consequently, this work provides valuable insights into the mechanisms underlying the corrosion of Ti-6Al-4V alloy under hydrogen charging conditions.