ASTM E159 Loss of Mass in a Reducing Gas Atmosphere for Cobalt, Copper, Tungsten, and Iron Powders (Hydrogen Loss)

ASTM E159 Loss of Mass in a Reducing Gas Atmosphere for Cobalt, Copper, Tungsten, and Iron Powders (Hydrogen Loss)

ASTM E159 test method is used to determine the mass of hydrogen reducible constituents such as oxygen in metals like cobalt, copper, iron, and tungsten.

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    Scope:

    ASTM E159 test method is useful for cobalt, copper, and iron which has an oxygen range from 0.05% to 3%, and for tungsten powder in the range of 0.10% to 0.5% oxygen. It cannot be used for silicon oxide (SiO2), aluminum oxide (Al2O3), magnesium oxide (MgO), calcium oxide (CaO), titanium dioxide (TiO2), etc., that is not reduced by hydrogen at the test temperatures. 

    Test Procedure

    ASTM E159 test method consists of subjecting a sample of powder to the action of a hydrogen-containing gas under standard conditions of temperature and time and measuring the resulting loss of mass.

    Video 01: Method to determine the loss of mass in a reducing atmosphere for metal powders (hydrogen loss)

    Test Specimen:

    The test specimen shall weigh approximately 5 g.

    Data

    In ASTM E159, the mass loss is calculated as follows:

    Where,

    A = original mass of the boat and powder specimen, g;

    B = mass of the boat and powder specimen after reduction, g

    C = original mass of the boat, g.

    Conclusion:

    ASTM E159 test method is used to determine the mass of hydrogen reducible constituents such as oxygen in metals like cobalt, copper, iron, and tungsten.

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