molybdenum and some metal solution

Sulfur vapor above 440 ℃, the hydrogen sulfide is required above 800 ℃ in order reaction occurs with Molybdenum tube molybdenum disulfide (MoS2), sulfur-containing gases at 700 ~ 800 ℃ can be oxidized molybdenum. Silicon and molybdenum at temperatures above 1200 ℃, the interactions generated molybdenum disilicide (MoSi2), when the temperature has risen at 1500 ℃, MoSi2 are very stable in the air. In addition, molybdenum and some metal solution, the role of non-metallic elements are shown in Table 1-2.
    Table 1-2 and some of the molten metal is molybdenum, the role of non-metallic elements case
    Name Function situation
    Bismuth Bi immersed in a liquid 1430 ℃ 2h Li Mo no significant corrosion in 1200 ~ 1600 ℃ liquid lithium, molybdenum solubility of performance (9 ± 5) × 10-6Na at 900 ~ 1200 ℃ liquid sodium, molybdenum, good resistance rot resistance, 1500 ℃ dip 100h intergranular corrosion was found, containing 0.5% O2 in the
    Sodium 700 ℃ molybdenum corrosion begins
    At 1205 ℃ liquid potassium, molybdenum has corrosion resistance, containing 15 × 10-6O2 liquid potassium in 1040K and 1316K when dissolved molybdenum K degrees were 6 × 10-6 and 13 × 10-6, with 5 × 10-3O2 liquid potassium 923K solubility is 0.02% Rb Rb immersed in the liquid at 1040 ℃ 500h molybdenum corrosion was not found at 1000 ℃ Be, molybdenum and their reaction MoBe2, Mo-Be two-element exists MoBe2, MoBe12 compounds such as Pb at 1098 ℃, the molybdenum has good corrosion resistance Hg at 600 ℃, molybdenum has good corrosion resistance N21200 ℃ above, the nitrogen does not dissolve rapidly in the molybdenum Mo H2 react molybdenum used as the reducing agent F2 quick response at room temperature, at 60 ℃ generate MoF6, generated when the presence of O2 or MoOF4Cl2 Mo2OF2 below 230 ℃, the drying of chlorine has a strong corrosion resistance, to start the reaction at 250 ℃, easily wet chlorine Corrosion Br2 below 450 ℃, the dried bromine has a strong corrosion resistance, wet with bromine in the air a role of molybdenum in the 500 ~ 800 ℃ I2, began to react with the molybdenum S sulfur vapor drying is started with the red heat Mo reaction at about 1200 ℃ graphite reacts with molybdenum MoC
    At room temperature, hydrochloric acid and sulfuric acid in the molybdenum is stable; but heated to 80 ~ 100 ℃ when the slightly soluble molybdenum. Nitric acid and aqua regia slowly at room temperature to dissolve the metal molybdenum, heating speed dissolution.
    Mo is stable to hydrofluoric acid, hydrofluoric acid and nitric acid in a mixture of rapid dissolution. When nitric acid, sulfuric acid, water at a volume ratio of 5:3:2, consisting of a mixture of molybdenum can be used as solubilizer. Molybdenum, tungsten coil wound core is dissolved in this mixture.
    Molybdenum metal dissolved in hydrogen peroxide and generates over hydracid - H2MoO6 and H2Mo2O11. Mo in the alkaline solution at room temperature is stable, slightly alkaline solution in the hot corrosion. Molten alkali metal oxide of molybdenum can strongly, if the presence of oxidants, molybdenum oxide is more severe, generated molybdate.
    1.3.2 Molybdenum analytical chemistry characteristics [5]
    In molybdenum metallurgical production process, the chemical analysis of molybdenum occupies an important position, to study the characteristics of analytical chemistry is essential.