corrosion resistance of titanium standard parts

titanium is a very active metal, and its equilibrium potential is low, the corrosion tendency of the thermodynamic medium is large. But in fact a number of titanium is stable medium,Medical titanium bar such as titanium in an oxidizing, neutral or weakly reducing medium such as corrosion resistant. This is because there are a lot of titanium and oxygen affinity, in the air or oxygen-containing medium, the titanium surface layer of dense, strong adhesion, large inert oxide film to protect the titanium substrate from corrosion. Even due to mechanical wear and tear will soon heal or regenerate. This indicates that the passivation of titanium is a metal having a strong tendency. Dielectric oxide film of titanium at temperatures below 315 ℃ always maintain this characteristic.
In order to improve the corrosion resistance of titanium, developed oxidation, electroplating, plasma spraying, ion nitriding surface treatment technology, ion implantation and laser processing of titanium oxide film played a role enhanced protection, access to the desired corrosion resistance effect. For sulfuric acid, hydrochloric acid, methyl amine solution,surgical implant titanium the high temperature and high temperature chloride wet chlorine produced in need of metal materials, the development of the titanium - molybdenum, titanium - palladium, titanium - molybdenum - and a series of corrosion resistant nickel titanium alloy. -32 Titanium castings using titanium-molybdenum alloy, often occur on or crevice corrosion pitting environment uses a titanium -0.3 -0.8 partial molybdenum-nickel alloy or titanium equipment -0.2 using titanium-palladium alloy, which have received a very good use effect.