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Application of Titanium Alloy in Ships and Corrosion Protection (3)

The titanium alloy for marine use in the United States is mainly based on aerospace titanium alloy, and has a corrosion resistance, weldability and stress corrosion resistance in a seawater corrosive environment, including pure titanium, Ti-0. 3Mo-0. 8Ni , Ti-3Al-2. 5V, Ti-6Al-4V, Ti-6Al-4V ELI, Ti-3Al-8V-6Cr-4Mo-4Zr. In addition, for the characteristics of marine titanium alloy, Ti-5Al-1Zr-1Sn-1V-0. 8Mo-0. 1Si, Ti-6Al-2Nb-1Ta-0. 8Mo and other marine titanium alloys have also been developed. The use of high-performance titanium alloys on ships has a significant effect on improving the mobility, stability, effectiveness, and hull quality of ships. The US Navy has certified the following ships in the 1990s, including: Nuclear Powered Carrier (CVN), Missile Cruiser (CG-47), Missile Frigate (FFG-7), Exploration Vessel (MCM), amphibious landing craft (LSD41CV), landing ship, hovercraft (LVCA), amphibious assault landing ship (LHD), fast combat munitions supply ship (AOE-6), double-shell monitoring ship (SWATH T-AGOS19), coastal survey ship (MHC-51), guided missile destroyer (DDG-51). High-performance titanium alloys have been or will be used in seawater cooling systems, seawater systems and fire suppression systems, structural components, propulsion, sewage treatment systems, electrical components, fasteners, etc. of these ships.

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