Application and corrosion protection of titanium alloy in ships

The ship is the most important equipment of the Navy, which is the platform for maritime transportation and combat. The materials used to build the ship should be able to withstand the corrosion of sea water and ocean atmosphere, with high specific strength, good plastic toughness and processing technology. As the overall structure of the ship is complex, the amount of materials used is large, and there are many varieties and specifications. It is the basis of guaranteeing the integrity and advancement of naval equipment to choose the material with excellent performance to make warship.

Titanium alloy in ship to application, mainly based on the following features of titanium alloy: the strength of a wide range, excellent mechanical properties, the unique physical properties (including magnetic), high specific strength and structure validity, excellent corrosion resistance and erosion resistance, good shock resistance, good machinability and weldability, reasonable cost and effectiveness. Experience in using a large number of Marine piping material, confirmed that the service life of the pipeline system in the traditional material is limited, among them, the steel pipe system using 1 ~ 2 years can produce corrosion, CuNi the service life of the piping system for 6 ~ 8 years, and titanium alloy pipe in the pipe system, pumps, valves, heat exchangers and other equipment can serve more than 40 years. Because Marine titanium alloy needs long-term service in Marine environment, the strength, stress corrosion fracture toughness and weldability of the alloy should be considered in the design of Marine titanium alloy.