【摘要】 工程装备在极端苛刻的深海环境中服役，将承受低温、低溶解氧、低pH值、污染物和微生物等复杂环境因素以及热液、洋流、高压和复杂工况载荷的作用，对深海装备的服役安全造成严重威胁。钛合金作为高耐蚀海洋结构材料，在深海工程装备制造中具有举足轻重的地位，但目前仍对钛合金在深海极端环境下的服役行为和失效机制认识不清，导致深海装备钛合金结构选材、设计和防护缺乏科学依据。通过对钛合金的耐蚀性及基本腐蚀电化学特征分析，梳理评述了钛合金材料在深海极端环境下所面临的微生物腐蚀、缝隙腐蚀、电偶腐蚀、氢脆及应力腐蚀、腐蚀疲劳以及多因素耦合腐蚀损伤问题，并提出了深海环境下钛合金腐蚀研究重点和发展方向。更多还原

【Abstract】 Engineering equipments serving in extremely harsh deep-sea environments will withstand complex environmental factors such as low temperature, low dissolved oxygen, low pH, pollutants, and microorganisms, as well as the effects of hydrothermal, ocean currents, hydrostatic pressure, and complex loads, which pose serious threats to the safety of these equipments in service. Titanium alloy,as a highly corrosion-resistant marine structural material, plays a crucial role in the manufacturing of deep-sea engineering equipments.However, the service behavior and failure mechanism of titanium alloy in extreme deep-sea environments are still unclear, leading to a lack of scientific basis for the selection, design, and protection of titanium alloy structures in deep-sea equipment. This paper analyzes the corrosion resistance and basic corrosion electrochemical characteristics of titanium alloys, systematically reviews the problems of microbial corrosion, crevice corrosion, galvanic corrosion, hydrogen embrittlement and stress corrosion, corrosion fatigue, and multi-factor coupled corrosion damage faced by titanium alloy materials in extreme deep-sea environments, and proposes the research focus and development direction of titanium alloy corrosion in deep-sea environments.更多还原