期刊
CORROSION SCIENCE
卷 206, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2022.110491
关键词
Residual stress; Ti35 alloy; Corrosion behavior; Reprocessing; Nitric acid
资金
- Qinchuangyuan Project of Shaanxi Province of China [2021QCY1-01]
- Natural Science Foundation of Shaanxi Province of China [2020JC-50, 2021JQ-976]
- Xi?an Sci- ence and Technology Plan Project of China [2020YZ0028]
The effect of microscale residual stresses on the initial corrosion behavior of Ti35 alloys in boiling nitric acid solutions was investigated. It was found that the concentration of residual stresses accelerated the dissolution of the alloys, but the formation of oxide films prevented the corrosion medium from reaching the surface of the alloys, reducing the effect of residual stresses on corrosion.
The effect of microscale residual stresses on the initial corrosion behavior of Ti35 alloys in boiling nitric acid solutions was investigated using a combination of electrochemical and immersion tests. The concentration of microscale residual stresses 48 h before corrosion accelerated the dissolution of Ti2+, Ti3+, and Ta5+, as determined by electrochemical impedance spectroscopy measurements and quantitative X-ray photoelectron spectroscopy analysis. After 48 h, the formation of oxide films with consistent compositions and contents (TiO2-51%, Ti2O3-47%, and Ta2O5-1.9%) prevented the corrosion medium from reaching the outer surface of the metal matrix, reducing the effect of residual stresses on the corrosion behavior.
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