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Moly Tungsten Alloy Chemical Properties

Molybdenum Tungsten Alloy Chemical Properties(Composition) As Follows:

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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