Time:2017-01-01 15:25:41 Dep:[Kitamura News] Auth:admin Click:
Kitaura valve (China) Co., Ltd. was commissioned by a nuclear plant in China, corrosion resistance, boiling point of 4377 degrees C. 2500LB 36''emergency shut-off valve, recently, by the customer...
Kitaura valve (China) Co., Ltd. was commissioned by a nuclear plant in China, corrosion resistance, boiling point of 4377 degrees C. 2500LB 36''emergency shut-off valve, recently, by the customer and the relevant departments of the project design debugging qualified, put into use, get a nuclear industry chemical plant high-profile attention and praise.
Kitaura ball zirconium has high temperature resistance, good corrosion resistance, processability and good performance and comprehensive performance of low thermal neutron absorption section, is an important structural materials of nuclear reactors, zirconium alloy is corrosion resistant valves and the one and only in alkali solution and molten alkali in various concentrations, even better than that of tantalum, zirconium series products ball valve etc. Ketem, now the development of chlor alkali industry, widely used in soda industry, pharmaceutical industry, chemical industry, fine chemical industry, textile and dyeing synthetic fiber industry, the production of organic acid and inorganic salt, nitrate industry etc..
Kitaura ball valve corrosion characteristics and application of zirconium in all concentration, temperature higher than the boiling point until the hydrochloric acid has excellent corrosion resistance, and easy occurrence of crevice corrosion, pitting corrosion and stress corrosion; zirconium ball in sulfuric acid resistant to boiling point, and higher than the boiling point, concentration below 70% sulfuric acid in acetic acid resistant; to various concentrations of acetic acid medium of 250 DEG in the almost no corrosion; in alkali solution and molten alkali medium with different concentration is the one and only corrosion resistant materials; zirconium ball valve has very good corrosion resistance in organic acid. Design standard HG, GB, JB, API, ANSI, ISO, BS, DIN, NF. zirconium element, used in and at high temperature and high pressure as corrosion resistant chemical materials. One of the high melting metals, light gray. Density 6.49 g / cm 3. Melting point 1852 + - 2 DEG C, boiling point of 4377 degrees C. +2, +3 and +4 valence. First ionization energy 6.84 ev. Zirconium surface is easy to form a layer of oxide film, shiny, so the appearance of similar steel. Has corrosion resistance, not soluble in hydrofluoric acid and aqua regia; high temperature, with non metallic elements and many metal elements to form solid solution compound reaction.
The surface of zirconium is like steel, which is covered by a dense oxide layer at normal temperature, but it has metallic luster. Powdered zirconium as dark gray. Zirconium melting point of 1852 degrees, density of 6.49 g / cm 3. Its plasticity is good, easy to process into plate, silk, etc.. Zirconium can absorb large amounts of oxygen, hydrogen, nitrogen and other gases when heated, and can be used as hydrogen storage materials. The corrosion resistance of zirconium is better than that of titanium. Zirconium and hafnium are chemically similar, history and symbiosis of two metal together, and containing radioactive substances. The content of zirconium in the crust is twentieth, almost equal to that of chromium. At present, zirconium minerals are of industrial value in nature, mainly zircon and baddeleyite. Zirconium is a rare metal, but in the earth's crust is more than copper, tin, zinc, etc..
Application of zirconium in the petrochemical industry, mainly used in corrosion resistance of high performance requirements of equipment, such as used in the manufacture of anti tank, acid proof pump, heat exchanger, infusion device, exhaust valve, mixer impeller, zirconium, nozzle, thermocouple sleeve, catheter and container liner and environmental protection equipment etc.. Many of the production of fertilizers, resins, plastics, acid chemical equipment and spare parts are used zirconium.