Titanium alloys are mainly suitable for seawater, chlorides, oxidizing acids, organic acids, alkalis and other media with nominal pressure not greater than PN25 and working temperature between -30°C~+316°C.

Titanium has a good affinity with oxygen, and it is very easy to react with oxygen to form a strong and dense passive oxide film on its surface. In the medium of many harsh corrosive working conditions, this layer of oxide film is very stable and difficult to dissolve. Even if it is damaged, it can repair itself and regenerate quickly as long as there is sufficient oxygen. Titanium alloy valves mainly use the characteristics of good stability and self-passivation ability of the oxide film of titanium metal materials in strong corrosive environments to resist strong corrosion in various harsh working conditions. It is resistant to seawater, various chlorides and hypochlorites, wet chlorine, oxidizing acids, organic acids, alkalis, etc. However, it is not resistant to the corrosion of relatively pure reducing acids, such as sulfuric acid and hydrochloric acid, but it is resistant to corrosion of nitric acid containing oxidants. Titanium alloy valves have good resistance to pitting corrosion, but stress corrosion will occur in red fuming nitric acid, chloride, methanol and other media.

Titanium alloy valves have outstanding advantages such as light specific gravity, high strength, corrosion resistance and good pressure resistance, and are widely used in aviation, space development, ocean engineering, petroleum, chemical industry, light industry, food processing, metallurgy, electric power, medicine and health, Instrumentation and other industry sectors.

Corrosion resistance characteristics and applications of titanium and titanium alloy valves:

Titanium alloy valves hardly corrode in the atmosphere, fresh water, sea water, and high-temperature steam.

Titanium alloy valves are very corrosion resistant in alkaline media.

Titanium alloy valves are very strong in resistance to chloride ions (Cl), and have excellent resistance to chloride ion corrosion.

Titanium alloy valves have good corrosion resistance in media such as aqua regia, sodium hypochlorite, chlorine water, and wet chlorine gas.

The corrosion resistance of titanium in organic acids depends on the reducing or oxidizing properties of the acid.

The corrosion resistance of titanium alloy valves in reducing acid depends on whether the medium has a corrosion inhibitor.