镍铝青铜作为海工装备动力部件在服役过程中面临空蚀破坏的突出问题，相关的空蚀机制理论尚未厘清，不同工况条件下的空蚀行为特性也有待进一步深入探索。本项目通过研究镍铝青铜空蚀过程中机械作用/化学腐蚀协同效应及其钝化膜动态回复机制，揭示间歇脉冲空蚀过程中空泡冲击与腐蚀作用之间的互做机制，阐明表面钝化膜的成膜特性及其对空蚀进程的影响规律。通过研究空蚀模式、空蚀介质对空蚀行为的影响进程，构建工况因素-材料组分-空蚀特性的本构关系方程，提出基于材料物性参数的系统评价体系；施加阴极极化电位抑制腐蚀反应，引入酸性空蚀介质消除表面钝化膜的影响，进而直接表征机械作用机制，直观反映钝化膜的影响机理；通过研究空蚀过程中镍铝青铜的机械损伤和化学腐蚀行为，阐明两者之间的交互作用机理，进而完善发展现有的空蚀理论，可以为镍铝青铜在海工装备中的耐空蚀应用提供理论依据和数据支撑，具有重要的学术价值和现实意义。

Nickel-aluminum bronze faced the outstanding problem of cavitation erosion failure when servicing in the marine condition. The theory of cavitation erosion has not yet been clarified. And the characteristics of cavitation erosion under different working conditions should be further explored. It was studied that the synergistic effect of mechanical action/chemical corrosion as well as the dynamic recovery mechanism of the passive film during the cavitation erosion process of Ni-Al bronze. It was revealed that the mutual mechanism between the cavitation attack and the corrosion during the intermittent pulse cavitation. The forming characteristics of the surface passivation film and its influence on the process of cavitation erosion were also clarified. The effect on the cavitation behavior of cavitation mode and cavitation media was investigated to construct the constitutive equation of servicing condition，material component and cavitation characteristic. The systematic evaluation system was also established based on the material properties parameters. The cathodic polarization potential was applied to suppress the corrosion reaction. The acidic cavitation media was also introduced to eliminate surface passivation film. And then the mechanical mechanism was directly characterized as well as the mechanism of passivation film. It was clarified that the interaction mechanism between mechanical damage and chemical corrosion during the cavitation process of nickel-aluminum bronze to develop the existing cavitation erosion theory. It is believed to provide a theoretical basis and data support for the cavitation application of nickel-aluminum bronze in the marine equipment, which has important academic value and practical significance.