Anti-corrosion Application Of Titanium Alloy

Among organic compounds, titanium has very good stability except for five organic acids (formic acid, acetic acid, oxalic acid, trichloroacetic acid and trifluoroacetic acid) at higher temperatures. Therefore, titanium is an excellent structural material in petroleum refining and petrochemical industry. It can be used to make various reactors, pressure vessels, heat exchangers, separator piping, distillation tower top condenser linings, etc.

In oil and gas drilling and production, the United Kingdom used titanium drilling and production equipment at a depth of 600m and a temperature of 262°C containing 5% H2S and 25% NaCl. The former Soviet Union used titanium pumps, titanium valves and titanium flushing brine equipment. In order to solve the corrosion of 600-700atm high temperature H2S, CO2 and water vapor in natural gas wellheads in our country, the valve plate, valve seat and valve stem of Ti-6Al-4V are used, and the long-term use effect is very good.

Offshore oil and gas mining must withstand seawater corrosion and stress corrosion for a long time. Ti-6Al-4V is widely used abroad as oil platform pillars, rope supports, high-pressure pumps, risers and couplings of seawater circulation pressurization systems. Because Ti-6A1-4V is not only resistant to seawater corrosion, but also has high toughness, high yield strength and high fatigue limit. Recently, titanium prestressed oil production pipe joints have been selected abroad. This joint is simple and quick to assemble, light in weight, and maintains elastic sealing. Titanium is the best material. my country's offshore oil industry is entering a stage of large-scale development. The current platform's structural parts and key components and equipment are imported from abroad, and domestic materials are rarely used. But it can be expected that titanium will find a broad market here.