ASTM E536 – 08 Chemical Analysis of Zinc and Zinc Alloys

ASTM E536 – 08 Chemical Analysis of Zinc and Zinc Alloys

ASTM E536 – 08 covers the chemical analysis of zinc and zinc alloys with chemical compositions within the following limitations i.e., Aluminum (0.005 to 4.5), Cadmium (0.001 to 0.5), Copper (0.001 to 1.3), Iron (0.001 to 0.1), Lead (0.001 to 1.6), Magnesium (0.001 to 0.1), and Tin (0.001 to 0.1). The values are considered as a standard when expressed in SI units.

    Scope:

    These test techniques for the chemical analysis of zinc metals and alloys are primarily designed to serve as referee procedures for determining whether materials meet compositional standards.

    Procedure:

    The solution is buffered, and disodium (ethylenedinitrilo) tetraacetate (EDTA) is added after the material is dissolved in hydrochloric acid. Standard zinc solution is used to titrate the excess EDTA. The aluminum-EDTA complex is decomposed with sodium fluoride, and the liberated EDTA is titrated with normal zinc solution.

    Specimen size:

    Almost 1 mg sample must be used.

    Data:

    The percentage of aluminum is calculated as.
    Aluminum, % = (AB/C) × 100
    Where:
    A = standard zinc solution used, mL
    B = aluminum equivalent of the standard zinc solution, g/mL
    C = sample represented in the aliquot, g

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