Molybdène alliage de tungstène Propriétés chimiques (composition) comme suit:
Tungsten |
Media |
Molybdenum |
No reaction |
Hydrogen |
No reaction |
No reaction |
Water |
No reaction |
Hot rapid oxidation state |
Steam |
700 ° C strongly oxidizing |
Slight oxidation at room temperature |
Air |
Slight oxidation at room temperature |
400 ~ 500 ° C was oxidized |
400 ° C was significantly oxidized |
|
700 ° C or more rapidly oxidized to WO3 |
600 ° C or more rapidly oxidized to MoO3 |
|
800 ° C begins to absorb carbon |
Carbon |
900 ° C begins to absorb carbon |
1400-1600 ° C to generate brittle WC |
1300 ~ 1400 ° C to generate brittle MO3C |
|
850 ° C starts brittle |
Carbon monoxide |
Above 800 ° C the reaction Mo2C |
WC generated over 1000 ° C |
|
|
1200 ° C or more is oxidized tungsten |
Carbon dioxide |
700 ° C above the oxidation of molybdenum |
|
Nitrogen |
500 ° C the following does not react |
2000 ° C the following does not react |
600 ° C or more brittle |
|
2300 ° C or more generated nitride |
1500 ° C or more generated nitride |
|
Hot oxidation state |
Nitrogen dioxide |
Hot oxidation state |
A little hot under the reaction condition |
Sulfur |
440 ° C above the reaction of sulfides |
Hot oxidation state |
Sulfur dioxide |
Hot oxidation state |
Fluoride generated at room temperature |
Halogen
|
Fluoride generated at room temperature |
250-300 ° C to generate chloride |
250 ° C to generate chloride |
|
Hot state, produces bromides and iodides |
Hot state, do not react with iodine |
|
The reaction temperature is not |
Ammonia |
Little reaction at room temperature |
In almost insoluble sodium hydroxide solution |
Sodium hydroxide |
Slightly soluble in sodium hydroxide solution |
Quickly dissolved in the molten sodium hydroxide |
Quickly dissolved in the molten sodium hydroxide |
|
Slightly soluble |
Nitric acid |
Easily soluble |
Sulfuric acid at room temperature in the reaction but is not slightly soluble in concentrated sulfuric acid |
Sulfuric acid |
In the dilute sulfuric acid at room temperature is slightly dissolve slowly dissolved in hot dilute sulfuric acid |
In hot dilute sulfuric acid and concentrated sulfuric acid slowly dissolved |
Slowly dissolved in concentrated sulfuric acid |
|
|
200 ~ 50 ° C was dissolved in concentrated sulfuric acid rapidly |
|
The reaction temperature is not |
Hydrochloric acid |
|
At 100 ° C slightly soluble |
In hot dilute hydrochloric acid dissolved in a little |
|
Slightly soluble at room temperature |
Hydrofluoric acid |
Slightly soluble at room temperature |
Dissolved in hot aqua regia |
Aqua regia |
Dissolved at room temperature, heat quickly dissolved in aqua regia |
The molten salt rapidly dissolved |
Sodium nitrite |
The molten salt rapidly dissolved |
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