molybdenum materials in the petrochemical industry applications

 The density of 10.2 g of molybdenum / cc. Melting point 2610 ℃. Boiling point 5560 ℃. In the Cape molybdenum powder made by isostatic beat green and sintered at about 2100 ℃ at 870 ~ 1260 ℃ within the range of thermal processing. Can be obtained through the plastic processing molybdenum alloy sheet, strip, foil, tubes, rods, wire and profiles, add different ingredients in the Cape after Ferrous Metals Ltd. also improve its strength and improve the low temperature ductility.
Molybdenum tube also very stable chemical properties, can not be hydrochloric acid, hydrofluoric acid, and the alkali etching, but in the nitric acid, aqua regia, or hot concentrated sulfuric acid may be corroded. Molybdenum is also an important additional element. Mo is effective at high temperatures accelerate the solid reinforced to prevent chloride pitting, but also improve the corrosion resistance of the stock solution.
A large demand for oil has forced people to accelerate on land and sea in deep oil extraction, and deep reservoirs often subjected to corrosive two hydrogen sulfide, carbon dioxide and high chloride brine contaminated and molybdenum from 0.15% to 0.25% AISI 4100 series of Cr-Mo steel is widely used. Improved molybdenum 0.4 to 0.6% of 4140 series of sulfide stress corrosion cracking (SCC) most resistant low-alloy steel, for the use of sulfur-containing wells.
 With the deepening of the drilling depth and the deteriorating conditions of use, higher stainless steel containing molybdenum and nickel-based alloys, such as alloy C -22 (13% Mo) and alloy C -276 (16% Mo) applications will continue to increase. Since chromium steel surface in a thin natural protective passivation film, so stainless steel has corrosion resistance. In fact, Molybdenum crucible this more robust passivation film, and chloride in the passivation film is destroyed it quickly regenerated. Increased molybdenum content to increase stainless steel pitting corrosion resistance and crack. 316 (2% ~ 3% Mo) is the most widely used stainless steel containing molybdenum. It is designated for food handling and processing and pharmaceuticals production and use of tanks, pipes and heat exchanger materials. Increased molybdenum content can enhance the air resistant to chlorides, so that 316 can also be used as the surrounding sea and coastal extensive use of the material of choice.
   When the Mo in the air reaches a temperature above about 600 ℃ easy to form volatile oxides, the application of high temperature molybdenum preferably in an inert gas or vacuum environment. http://www.lykehai.com segments