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Related Experiment Videos

Temperature-dependent nickel release from nickel alloys.

T Menne, P Solgaard

    Contact Dermatitis
    |March 1, 1979
    PubMed
    Summary

    Nickel release from coins and jeans buttons increases with temperature. Different metal alloys show varying sensitivity to heat, impacting nickel leaching into water and synthetic sweat.

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    Area of Science:

    • Materials Science
    • Environmental Science
    • Toxicology

    Background:

    • Nickel is a common metal found in consumer products like coins and clothing fasteners.
    • Nickel release from metal objects can be a concern due to potential allergic reactions and environmental contamination.
    • Understanding factors influencing nickel leaching is crucial for product safety and risk assessment.

    Purpose of the Study:

    • To quantify nickel release from Danish one krone coins and metal buttons from jeans.
    • To investigate the effect of temperature (20°C vs. 35°C) and medium (distilled water vs. synthetic sweat) on nickel release.
    • To determine if alloy composition influences nickel leaching sensitivity to temperature.

    Main Methods:

    • Nickel release was measured from coin and button samples under controlled laboratory conditions.
    • Experiments were conducted at two temperatures: 20°C and 35°C.
    • Testing involved immersion in both distilled water and synthetic sweat.

    Main Results:

    • Elevated temperature (35°C) significantly increased nickel release from the one krone coins.
    • Two out of nine metal buttons tested also showed increased nickel release at the higher temperature.
    • The sensitivity of nickel release to temperature varied among the different metal alloys tested.

    Conclusions:

    • Temperature is a critical factor influencing nickel release from certain metal products.
    • The specific alloy composition of metal objects plays a significant role in their propensity for nickel leaching.
    • Findings highlight the need to consider environmental conditions and material properties in assessing nickel exposure risks.

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