Corrosion Resistance Evolution of SiCf/Ti55531 Composite in Simulated Marine Atmosphere

WEI Wei; QIAO Chuang; JIANG Yishan; ZHANG Qichao; HAO Long

doi:10.7643/ issn.1672-9242.2025.09.002

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Equipment Environmental Engineering ›› 2025, Vol. 22 ›› Issue (9) : 12-22. DOI: 10.7643/ issn.1672-9242.2025.09.002

Special Topic—Reliability of Ship Equipment

Corrosion Resistance Evolution of SiC_f/Ti55531 Composite in Simulated Marine Atmosphere

WEI Wei¹, QIAO Chuang^2,*, JIANG Yishan³, ZHANG Qichao³, HAO Long^2,*

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Abstract

The work aims to reveal the effect of SiC fiber exposure on the corrosion resistance evolution of SiC_f/Ti55531 composite in marine atmosphere environment to provide data support for the application of SiC_f reinforced titanium alloy composites in the field of marine equipment. The EIS data of SiC_f/Ti55531 composites under different states during the corrosion process were obtained based on electrochemical impedance spectroscopy (EIS) test. The evolution behavior of EIS data was analyzed with Ohmic resistance correction method. The electrical equivalent circuit model and Voigt model were used to fit the EIS data, clarifying the physical source of the observed time-constants of the authentic-EIS characteristics during the corrosion process of SiC_f/Ti55531 composites in different states. For the intact SiC_f/Ti55531 composite without SiC_f exposure, the measured EIS response came from the corrosion-resistant oxide film on the Ti55531 alloy substrate surface. The low-frequency impedance modulus |Z|_{0.01 Hz} under wet surface condition was at the order of 10⁶ Ω·cm², indicating the good corrosion resistance of the composite. For the SiC_f/Ti55531 composite with SiC_f exposure, the observed |Z|_{0.01 Hz} value under wet surface condition was at the order of 10⁵ Ω·cm², and the corrosion resistance was slightly reduced. However, the obtained EIS response, at this time, still came from the surface oxide film, and the film resistance did not show a significant decreasing trend over the corrosion duration. The SiC_f exposure will not seriously deteriorate the corrosion resistance of SiC_f/Ti55531 composite, which means that even if the SiC_f/Ti55531 composite is damaged, causing SiC_f exposure, it still has good and stable corrosion resistance in marine atmosphere environment.

Key words

Ti alloy / SiC_f/Ti55531 composite / oxide film / marine corrosion / atmospheric corrosion / electrochemical impedance spectroscopy

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WEI Wei, QIAO Chuang, JIANG Yishan, ZHANG Qichao, HAO Long. Corrosion Resistance Evolution of SiC_f/Ti55531 Composite in Simulated Marine Atmosphere[J]. Equipment Environmental Engineering. 2025, 22(9): 12-22 https://doi.org/10.7643/ issn.1672-9242.2025.09.002

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Funding

; Fund：National Natural Science Foundation of China (52401126); China Postdoctoral Science Foundation (2025M770108); Liaoning Natural Science Foundation Program (2024-MSBA-67); Doctoral Research Initiation Grant of Liaoning Institute of Science and Technology (1910B06)