The main characteristics of titanium tubes for seawater desalination

1, Small density, higher than the intensity (strength / specific gravity)

The density of titanium metal is 4.51 g/cm3, which is higher than aluminum and lower than steel, copper and nickel. But the specific strength is located in the first of the metal, 3 times of stainless steel, 1.3 times of aluminum alloy;

2, Good corrosion resistance

Titanium is a very active metal with a very low equilibrium potential and a large thermodynamic corrosion tendency in the medium. But in fact, titanium is very stable in many media, such as titanium in oxidation, neutral and weak reducing media are corrosion resistant. This is because titanium and oxygen have a great affinity, in air or medium containing oxygen, the titanium surface generates a dense layer of strong, strong adhesion, inert oxide film, which protects the titanium matrix from corrosion. Even if the mechanical wear can quickly self-heal or regenerate. This indicates that titanium is a metal with a strong passivation tendency. The oxide film with a medium temperature below 315℃ always maintains this characteristic.

3,Good heat transfer performance

Although the thermal conductivity of titanium metal is lower than that of carbon steel and copper, the wall thickness can be greatly thinner, and the heat transfer mode of surface and steam is drop condensation, which reduces the heat group, the surface can also reduce thermal resistance, so that the heat transfer performance of titanium is significantly improved.

4, Good heat resistance

The new titanium alloy can be used for a long time at temperatures of 600℃ or higher.

5, The chemical industry low temperature resistance performance is good

Titanium alloy TA7(Ti-5Al-2.5Sn), TC4 (Ti-6Al-4V) and Ti-2.5Zr-1.5Mo, their strength increases with the decrease of temperature, but the plastic change is not great.

6,Tensile strength and its yield strength

This performance indicates the high yield strength ratio (tensile strength / yield strength), which indicates the poor plastic deformation of the titanium material when forming. Due to the large ratio of the yield limit to the elastic modulus, the rebound ability of titanium when forming is large.