Titanium Basics Introduction

Due to the excellent corrosion resistance of titanium, titanium is widely used in petroleum, chemicals, salt,; the relevant pharmaceutical, metallurgy, electronics, aviation, aerospace, marine and other.

Titanium is a metal having a strong tendency to passivation, and oxidizing in air or a neutral aqueous solution can quickly generate a stable oxidation protective film, even if the film is destroyed for some reason, can quickly resume automatically. Thus Titanium has excellent corrosion resistance in oxidizing, neutral medium.

Due to the huge passivation properties of titanium, in many cases when in contact with dissimilar metals does not accelerate corrosion, which may accelerate the corrosion of dissimilar metals. When such a low concentration of non-oxidizing acids, if Pb, Sn, Cu, or Monel and titanium-contact electrical coupling, accelerate corrosion of these materials, and titanium is not affected. In hydrochloric acid, when brought into contact with the titanium low carbon steel, since the surface of titanium nascent hydrogen, destroys the oxide film of titanium, titanium not only causes hydrogen embrittlement, and to accelerate the corrosion of titanium, titanium this may be due to hydrogen is highly activity due.

Titanium iron content of certain media affect corrosion resistance, iron number of reasons in addition to the reasons of raw materials, are often contaminated iron welding weld penetration, so the local iron bead increased, which When corrosion has an uneven nature. Used iron pieces to support titanium equipment, iron titanium contact surface iron contamination is almost inevitable in accelerated corrosion of iron contamination zone, especially in the presence of hydrogen. When the surface of the titanium oxide film contamination of mechanical damage, infiltration of hydrogen on metal, depending on the temperature, pressure and other conditions, the hydrogen generating corresponding diffusion, which makes titanium produce different degrees of hydrogen embrittlement. Therefore titanium at moderate temperatures and moderate pressure and hydrogen used in the system to avoid surface iron contamination.

Because titanium in hydrocarbons corrosion resistance is very good, even when containing acid and chloride impurities is also very good. Therefore, in the organic chemical industry Titanium is also widely used, such as PTA (purified terephthalic acid), PVA (Vinylon), etc. Titanium has excellent corrosion resistance in seawater, it is also widely used titanium offshore oil drilling platform, desalination and other marine areas.