深海钻具腐蚀冲蚀磨损失效规律及其防护机理研究

The special service environment of earth deep drilling and ocean scientific drilling put forward higher requirements on the service performance and service safety of the deep-sea drills. The corrosion resistance, erosion resistance and abrasion resistance of key parts of deep-sea drills can be significant improved through the surface protection of quick-wear part using advanced surface engineering technology. However, the research on the corrosion-erosion-wear failure law and the protective mechanism of the protective layer in the special service environment is not systematically enough. In this project, the changing law of microstructure, mechanical property and electrochemical performance of drill protective layers in the special deep-sea environment will be systematically analyzed. The action mechanism among the service environment, structure evolution and corrosion-erosion-wear failure law for the protective layers will be also researched. The life prediction model with high reliability for the protective layers on the deep-sea drills will be established. The influence of the key parameters on the life of the protective layer will be revealed. The research results can provide the theoretical basis and engineering guidance for the reliability design of the performance and structure, and the service safety verification of the protective layers on deep-sea drills.

深海探测和大洋科学钻探特殊的服役环境对深海钻具的使用性能和服役安全提出了更高的要求。利用先进的表面工程技术对深海钻具关键易损零部件进行表面防护，能显著提升其耐腐蚀、耐冲蚀和耐磨损性能，但是对于防护层在特殊服役环境下的腐蚀-冲蚀-磨损失效规律及其防护机理的研究尚不够系统深入。本项目提出系统分析深海特殊环境中钻具防护层的微观结构、力学性能及电化学性能变化规律，深入挖掘防护层的服役环境-组织结构演变-腐蚀/冲蚀/磨损失效规律之间的作用机制，建立高置信度深海钻具防护层寿命预测模型，揭示深海关键工况参数对防护层寿命的影响规律。项目预期研究成果可为深海钻具防护层的性能结构可靠性设计及其服役安全验证提供理论基础和工程指导。

深海探测和大洋科学钻探特殊的服役环境对深海钻具的使用性能和服役安全提出了更高的要求。利用先进的表面工程技术对深海钻具关键易损零部件进行表面防护，能显著提升其耐腐蚀、耐冲蚀和耐磨损性能，但是对于防护层在特殊服役环境下的腐蚀-冲蚀-磨损失效规律及其防护机理的研究尚不够系统深入。本项目系统分析了深海特殊环境中钻具防护层的微观结构、力学性能及电化学性能变化规律，挖掘了防护层的服役环境-组织结构演变-腐蚀/冲蚀/磨损失效规律之间的作用机制，揭示了深海复杂工况参数对防护层寿命的影响规律。项目研究成果为深海钻具防护层的性能结构可靠性设计及其服役安全验证提供理论基础和工程指导。