Xin Lang Cai Jing·2026-01-21 08:13Core Viewpoint - The development of deep-sea materials is crucial for advancing deep-sea technology and unlocking the potential of the trillion-dollar deep-sea mineral resources market, supporting the entire industry chain from equipment manufacturing to resource utilization [1][3]. Group 1: Deep-Sea Materials Overview - Deep-sea materials are essential for operations in extreme environments characterized by high pressure, low temperature, and strong corrosion, directly influencing development capabilities [1]. - These materials can be categorized by function into pressure-resistant structural materials, buoyancy materials, sealing materials, protective materials, and lighting materials, and by properties into high-strength metal materials, polymer composites, and ceramic-based composites [1][3]. Group 2: Pressure-Resistant Structural Materials - Pressure-resistant structural materials are divided into metal and non-metal categories, with metal systems being more mature, including high-strength alloy steel, titanium alloys, and aluminum alloys [3]. - Non-metal materials are also making progress, with composite materials showing significant potential due to their lightweight and corrosion-resistant properties [3][4]. Group 3: Titanium Alloys - Titanium alloys, known as "marine metals," are favored for their high strength, excellent corrosion resistance, and low density (60% of steel), making them ideal for marine engineering and deep-sea pressure vessels [5]. - Companies like BaoTi Co., Ltd. and Western Materials are leading in titanium alloy production, with BaoTi being the largest global producer and achieving mass production of deep-sea titanium alloy components [7]. Group 4: Sealing Materials - Deep-sea sealing materials include rubber sealing materials, metal sealing materials, and special engineering plastics, with rubber materials currently dominating the market [9]. - Metal seals, particularly titanium and nickel-based alloys, are gaining attention for their superior durability and temperature adaptability in deep-sea applications [9]. Group 5: Corrosion-Resistant Materials - Corrosion-resistant materials are critical in deep-sea environments, with methods to reduce corrosion including the development of new materials and the application of protective coatings [11]. - Common anti-corrosion coatings used in marine applications include rubber-based, epoxy-based, fluorocarbon, and organic silicone coatings, each with specific advantages and limitations [11].