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What are the properties of titanium in titanium coil pipe?
Advantages of titanium coil pipe
1. Excellent corrosion resistance in many media
2. Smooth surface, no scale layer
3. Low density, high strength, and therefore light weight
Ten properties of titanium in titanium coil pipe
1. Low density, high specific strength
The metal titanium has a density of 4.51 g/cm3, which is higher than aluminum and lower than steel, copper, and nickel, and the strength is larger in the metal.
2. Corrosion resistance
Titanium is a very active metal. Its equilibrium potential is very low and its tendency to thermodynamic corrosion in the medium is high. However, in fact, titanium is very stable in various media such as oxidizing, neutral and weak reducing properties, and has corrosion resistance. This is because titanium and oxygen have a strong adhesion. In an oxygen-containing air or medium, a dense, strong adhesion and inert oxide film is formed on the surface of the titanium to protect the titanium substrate from corrosion. Even if it is mechanically worn, it can recover or restore itself. This indicates that titanium is a metal with a strong tendency to passivate, and a titanium oxide film having a dielectric temperature lower than 315 ° C has maintained this property.
In order to increase the corrosion resistance of titanium, surface treatment skills such as oxidation, electroplating, plasma spraying, ion nitriding, ion implantation and laser treatment have been developed, and the protection of titanium oxide film has been increased to achieve the expected corrosion resistance. In order to meet the needs of metal materials such as sulfuric acid, hydrochloric acid, methylamine solution and high temperature wet chloride, a series of corrosion-resistant titanium alloys such as titanium molybdenum, titanium target and titanium molybdenum nickel have been developed. The titanium casting is made of titanium 32 molybdenum alloy. Ti-0.3 molybdenum-0.8 nickel alloy or Ti-0.2 palladium alloy is used locally in an environment where crevice corrosion or pitting often occurs, and good efficiency is obtained.
3. Good heat resistance
The new titanium alloy can be used for a long time at 600 ° C or higher temperatures.
4. Good low temperature resistance
Low-temperature titanium alloys represented by titanium alloys such as TA7 (Ti-5Al-2.5Sn), TC4 (Ti-6Al-4V) and Ti-2.5Zr-1.5Mn, whose strength increases with the decrease of temperature, but the plasticity changes are not Big. It maintains good ductility and toughness at a low temperature of -196-253 °C. It has spared the cold and brittleness of metal and is an ideal material for equipment such as cryogenic vessels and tanks.
5. Good anti-damping performance
When metal titanium is subjected to mechanical vibration and electrical vibration, its own vibration decay time is longer than that of steel or copper metal. This performance of titanium can be used as a tuning fork, an academic pulverizing vibration element, and a vibrating film of an acoustic speaker.
6. Non-magnetic, no dirt
Titanium is a non-magnetic metal that is not magnetized in large magnetic fields. It is non-fouling, has good compatibility with human tissues and blood, and is used by academics.
7. Tensile strength is close to its yield strength
This property of titanium indicates that the yield strength ratio (tensile strength/yield strength) is high, indicating that the plastic deformation of titanium metal during formation is poor. Since the ratio of the yield strength to the modulus of elasticity of titanium is large, the resilience of titanium during the forming process becomes large.
8. Good heat transfer performance
Although the thermal conductivity of titanium metal is lower than that of carbon steel and copper, its wall thickness can be greatly reduced due to its excellent corrosion resistance. The heat transfer between surface and steam is droplet condensation, which reduces the thermal resistance. Cooling on the surface also reduces thermal resistance. Since the surface is free of dirt, the heat transfer performance of titanium can be significantly increased.
9. Low modulus of elasticity
The modulus of elasticity of titanium is 106.4 GMPA at room temperature, which is 57% of steel.
10. Inspiratory performance
Titanium is a very active metal that reacts with many elements and compounds at high temperatures. Titanium inhalation mainly refers to the reaction with carbon, hydrogen, nitrogen and oxygen at high temperature.