ULTRASONIC CAVITATION EROSION-CORROSION BEHAVIOR OF NiTi CLADDINGS WITH Ni AND Cu INTERLAYER

Zhenping Shi, Zhengbin Wang, Yanxin Qiao, Tao Wang and Yugui Zheng
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Zhenping Shi: Metals and Chemistry Research Institute of China Academy of Railway Sciences, Beijing 100081, P. R. China
Zhengbin Wang: ��CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China
Yanxin Qiao: ��School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China
Tao Wang: Metals and Chemistry Research Institute of China Academy of Railway Sciences, Beijing 100081, P. R. China
Yugui Zheng: ��CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China

Surface Review and Letters (SRL), 2025, vol. 32, issue 05, 1-11

Abstract: The NiTi claddings by tungsten inert gas (TIG) with Ni and Cu interlayer were manufactured to resist the cavitation erosion-corrosion (CEC). The cavitation test, the open circuit potential and the potentiodynamic polarization measurements were used to study the synergistic effect among cavitation erosion (CE) and corrosion for the NiTi claddings. After the CEC test for 11h, the cumulative mass loss of 304 stainless steel is 5 and 1.15 times that of NiTi-Ni-TIG cladding and NiTi-Cu-TIG cladding, respectively. In NiTi-Cu-TIG cladding, the galvanic corrosion between the Cu-Ti intermetallics and the B2 phase causes the anodic dissolution of the Cu-Ti intermetallics, and results in the B2 phase losing support and spalling off during the CEC test. In contrast, NiTi-Ni-TIG cladding can be used against the CEC because of its uniform microstructure, no Cu-rich area and the effect of corrosion on CE of NiTi-Ni-TIG cladding is small.

Keywords: Cavitation erosion-corrosion; synergistic effect; NiTi; cladding; interlayer (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1142/S0218625X22400029

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