Corrosion resistance of titanium and titanium alloys pump than other common metals

Titanium and titanium alloy pump in the wet chlorine gas corrosion resistance than other common metals, this is because with a strong oxidizing action of chlorine, Titanium castings and titanium alloy pump can be in wet chlorine stable passive state, in order to maintain the chlorine in the titanium obtuse nature, requires a certain moisture content. Critical moisture and oxygen pressure, flow rate, temperature and other factors, but also with the shape and size of titanium and titanium precision casting equipment or machinery parts related to the degree of damage to the surface, therefore, the literature on critical water content of titanium in oxygen passivation is inconsistent is generally believed that the mass fraction of 0.01% to 0.05% titanium in oxygen as the critical water content, but the actual experience that in order to ensure the safe use of aerospace casting equipment in oxygen, and sometimes the water mass fraction of 0.6% also enough, requiring up to 1.5%. Critical water content also varies with temperature and air velocity chlorine decrease increase accordingly. Actual operating experience also shows that the surface oxide film of titanium and titanium alloy pump destroyed, requiring a higher water content in order to make re-passivation of titanium and titanium alloy pump.

Titanium alloy pump special considerations

Import and export operation rights and have the right to operate cross-border trade enterprises are not allowed to import or import agent titanium alloy pump scrap ,scrap titanium alloy pump,titanium alloy scrap ,titanium alloy pump once discovered ,is handled by the foreign trade department according to relevant regulations ,the circumstances are serious business ,cancel or suspend its right to operate import and export business.To titanium ,titanium alloy pump product catalog to include Titanium castings statutory inspection by the State Administration for Entry for the implementation of the statutory inspection of imported titanium , do not ban the import of compliant products .Enterprises for the production of titanium production license system , the quality and technical supervision departments providers nonferrous metals industry management department of the existing producers of titanium alloy sheets titanium production licenses issued . Unlicensed businesses and individuals are not allowed to production and processing of titanium and its products .

Titanium alloy development at an alarming rate

As the representative of the United States Bureau of Mines research and production facilities for titanium casting technology in-depth research, development of the melting and titanium precision casting process is suitable for titanium , which is a low-cost processing and forming of titanium alloys opened up a new path. As a method of casting forming complex shapes can be directly manufactured parts eliminates a lot of the subsequent titanium alloy pump processing steps , thus increasing material utilization and reduce manufacturing costs. According to statistics, titanium forgings material utilization is Titanium sheets generally not more than 20 %, while the common titanium alloy casting material utilization is 50% , for precision casting is as high as 70% or more , which can be seen the great potential of titanium alloy casting .

Titanium pump in wet chlorine corrosion resistance than other common metals

Titanium and titanium alloys in the wet chlorine gas corrosion resistance than other common metals, this is because with a strong oxidizing action of chlorine, titanium pumps and titanium alloys can be in wet chlorine stable passive state, in order to maintain the chlorine in the titanium obtuse nature, requires a certain moisture content. Critical moisture and oxygen pressure, flow rate, temperature and other factors, but also with the shape and size oftitanium alloy and titanium equipment or machinery parts related to the degree of damage to the surface, therefore, the literature on critical water content of titanium in oxygen passivation is inconsistent is generally believed that the mass fraction of 0.01% to 0.05% titanium alloy pump in oxygen as the critical water content, but the actual experience that in order to ensure the safe use of titanium equipment in oxygen, and sometimes the water mass fraction of 0.6% also enough, requiring up to 1.5%. Critical water content also varies with temperature and air velocity chlorine decrease increase accordingly. Actual operating experience also shows that the surface oxide film of titanium and titanium alloys destroyed, requiring a higher water content in order to make re-passivation of titanium and titanium alloys.