Titanium alloy is widely used in marine engineering, and has become the material of choice for many marine equipment due to its excellent corrosion resistance, high strength, low density and other characteristics.
Oil extraction and marine platforms
A U.S. company used seamless titanium alloy pipe made of nearly 500m long vertical well pipe for offshore drilling platforms. The light weight, high fracture toughness and long fatigue life of this kind of vertical shaft pipe greatly reduces ballast costs.Ti-6Al-4V(Gr.5) alloy is the best material for drilling pipe, and its yield strength and fatigue strength are very suitable for drilling applications. In addition, titanium pumps, valves, fittings, fasteners and other small titanium components are widely used on oil extraction platforms.
Harbor Construction
Titanium has an oxide film on its surface with a thickness of no more than 10nm, which provides excellent corrosion resistance to air, seawater and marine environments. In Japan, titanium is used extensively in marine development projects such as bridges, cross-sea roads, airports, and harbor logistics bases. Titanium not only has excellent corrosion resistance, but is also non-toxic and does not pollute the environment.
Coastal power stations
The condenser of a coastal power station is a device that utilizes a large amount of seawater. As seawater contains a large number of corrosive substances, the traditional condenser material copper alloy tube is often seriously damaged. Titanium, however, has good corrosion resistance in seawater, especially polluted seawater, and is therefore widely used in condenser manufacturing.
Seawater desalination plant
At present, the lack of water resources has become a problem plaguing the whole world. Seawater desalination will be an effective method for human beings to solve fresh water resources. From the development of seawater desalination at home and abroad, it mainly consists of two methods: distillation method and reverse osmosis method. Titanium is widely used in the heater heat transfer tubes of desalination units because of its excellent seawater corrosion resistance. By 2004, there were more than 15,000 desalination units built and under construction all over the world, in which a large number of titanium materials were used.
Ship
Titanium and its alloys are corrosion-resistant in seawater and marine atmosphere, and light weight, high strength, impact resistance, non-magnetic, sound transmission, small expansion coefficient, is considered a good ship material. National navies and the shipbuilding industry also attach great importance to the application of titanium on ships, and have developed many grades of titanium alloys for ships. Titanium is widely used in hull structural parts, deep-sea survey ships and submarines pressure-resistant shells, pipes, valves, rudders and other components.
Ocean thermal energy conversion
The ocean contains huge thermal energy resources. The use of titanium and its alloys for the manufacture of equipment can be highly efficient marine thermal energy conversion. Due to its excellent corrosion resistance and high strength, titanium is an ideal material for ocean thermal energy conversion systems.
In addition, titanium is also widely used in marine fisheries, such as titanium metal mesh and titanium tube heat exchangers used in artificial aquaculture technology.
