MIRALLOY® Copper-Tin-(Zinc-) Electrolytes

    Thương hiệu: UMICORE
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    Barrel and rack plating electrolyte for functional applications

    MIRALLOY® has been offering nickel-free plating for the connector, clothing and fashion jewellery industries for more than 30 years. You can benefit from our experience and the ongoing development of our product range. The trademark MIRALLOY® comes from the English words “mirror“ and “alloy“. It refers to the Bronze Age, when copper and tin were used to make mirrored alloys.

    MIRALLOY® denotes electroplating processes for the deposition of alloy coatings of copper and tin or of copper, tin and zinc. Depending on the electrolyte used, white or yellow layers can be deposited. You can choose electrolytes for rack and barrel plating from the wide range of MIRALLOY® processes available.

    Electrolyte characteristics

    Electrolyte type

    Alkaline-cyanide

    Metal content

    8.5 g/l Cu 34 g/l Sn 0.75 g/l Zn

    pH value

    > 13

    Operating temperature

    60 (58 - 62) °C

    Current density range

    0.5 (0.3 - 1) A/dm²

    Plating speed

    0.12 μm/min at 0.5 A/dm²

    Anode material

    MMO (type PLATINODE® 167, graphite)

    Electrical conductivity

    >50 m*(Ω*mm²)-1

    Coating characteristics

    Coating

    Copper-tin-zinc

    Alloy composition

    55 wt. % Cu 30 wt. % Sn 15 wt. % Zn

    Colour of deposit

    white

    Hardness

    550 HV

    Max. coating thickness

    5 μm


    Advantages

    • White layer, similar to silver
    • Diamagnetic
    • High reflectivity
    • Good wear and corrosion protection
    • Abrasion- and tarnish-resistant
    • Can be combined with precious metals
    • Good sliding properties
    • High hardness
    • Solderable and weldable
    • Very good metal distribution
    • Low porosity
    • Free from heavy metals like CR, Pb, Co, Th etc.
    • Low intermodulation
    • Platings are RoHS-compliant


    Applications

    • High frequency connectors
    • Battery covers
    • Hydraulic parts
    • Contact pins
    • Cooling coils
    • Bearing shells
    • Conducting elements







    Umicore is a global materials technology and recycling group, with about 10,000 employees and a turnover of € 10.4 billion in 2015. Umicore generates the majority of its revenues and dedicates most of its R&D efforts to clean technologies, such as emission control catalysts, materials for rechargeable batteries and recycling. Umicore’s overriding goal of sustainable value creation is based on an ambition to develop, produce and recycle materials in a way that fulfils its mission: materials for a better life.

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    Umicore is a global materials technology and recycling group, with about 10,000 employees and a turnover of € 10.4 billion in 2015. Umicore generates the majority of its revenues and dedicates most of its R&D efforts to clean technologies, such as emission control catalysts, materials for rechargeable batteries and recycling. Umicore’s overriding goal of sustainable value creation is based on an ambition to develop, produce and recycle materials in a way that fulfils its mission: materials for a better life.