Abstract:

Marine economy has become one of the important pillars of global economic development. However, the high temperature, humidity, salt mist, and intense radiation in the South China Sea cause severe corrosion of marine engineering materials and equipment in service. Titanium alloys, with their low density, high specific strength, and excellent corrosion resistance, are the preferred materials for marine engineering equipment. However, the high application costs severely restrict their widespread application. Reducing the application costs of titanium in marine environments has become a key focus for the development of marine titanium alloys. This article reviewed the progress of low-cost titanium applications both in China and abroad, focusing on two aspects of low-cost extraction and reduced usage of titanium. It analyzed three low-cost titanium extraction technologies: the FFC process, the OS process, and the USTB process. The article also outlined three approaches for reducing titanium usage: titanium-steel thermomechanical composites, high-energy beam preparation of titanium alloy coatings, and titanium-steel ultrasonic composites. It envisioned a development model for the large-scale and low-cost application of marine titanium alloys and offered targeted suggestions for advancing basic research, conducting product application studies, strengthening talent cultivation and recruitment, and enhancing industry, university, and research collaboration and technology transfer, so as to promote the overall enhancement and high-quality development of China’s marine titanium alloy industry.

Key words: marine titanium alloy, corrosion, low cost, titanium metal extraction, titanium-steel composite

摘要：

海洋经济已成为全球经济发展的重要支柱之一。南海海洋环境的高温、高湿、高盐雾、强辐照，导致海洋工程材料和装备服役出现严重的腐蚀问题。钛合金具有低密度、高比强度、高耐蚀性等突出优点，是海洋工程装备的优选材料，但昂贵的应用成本严重制约了其应用拓展。如何降低钛在海洋领域的应用成本已成为海洋钛合金发展的重点。文章从钛的低成本提取和钛的减量使用两个方面，回顾了国内外钛的低成本应用研究进展，剖析了3种钛的低成本提取技术，概述了钛钢热机复合工程、高能束流制备钛合金涂层和钛钢超声复合3种钛的减量使用技术途径，展望了海洋钛合金低成本规模化应用的发展模式，针对性提出了深化基础研究、开展产品应用研究、强化人才培育与引进、加强产学研结合与技术转化等发展建议，以期促进中国海洋钛合金产业整体水平提升和高质量发展。

关键词: 海洋钛合金, 腐蚀, 低成本, 钛金属提取, 钛钢复合