Chemistry and related sciences

28
Jul

Calculate the current density.

Hi, i met a problem to calculate the current density in the
electroplating. As i know , to calculate the current density, we muz
know what is the current and the electrode surface area that immersed
in the electrolyte. My question is that the electrode used to
calculate the surface area is cathode or anode, or the average of
both? and lets say the surface area of cathode to be plated is used to
calculate, then what if the cathode is more than one. What i mean is i
have to use the average of the srface area of the cathodes or the
total of all cathode surface area??

posted by admin in Uncategorized and have Comments (3)

3 Responses to “Calculate the current density.”

  1. admin says:
    July 28 at 7:37 am

    On Mar 14, 2:10 am, "Hafel" <AnGhf…@gmail.com> wrote:

    > Hi, i met a problem to calculate the current density in the
    > electroplating. As i know , to calculate the current density, we muz
    > know what is the current and the electrode surface area that immersed
    > in the electrolyte.

    Current density refers to the electrode, not to the whole system. For
    electroplating, it would refer to the object being plated (working
    electrode).

    The counterelectrode, as a rule, should be larger in any case, the
    better to know or control the plating potential at the working
    electrode.

    Dangerous Bill

  2. admin says:
    July 28 at 7:37 am

    On Wed, 14 Mar 2007 10:10:00 +0100, Hafel <AnGhf…@gmail.com> wrote:
    > Hi, i met a problem to calculate the current density in the
    > electroplating. As i know , to calculate the current density, we muz
    > know what is the current and the electrode surface area that immersed
    > in the electrolyte. My question is that the electrode used to
    > calculate the surface area is cathode or anode, or the average of
    > both? and lets say the surface area of cathode to be plated is used to
    > calculate, then what if the cathode is more than one. What i mean is i
    > have to use the average of the srface area of the cathodes or the
    > total of all cathode surface area??

    Total surface at which the deposition is going on. This means sum of  
    surfaces of all cathodes present.

    Borek
    —
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    http://www.ph-meter.info/pH-electrode
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  3. admin says:
    July 28 at 7:37 am

    > Total surface at which the deposition is going on. This means sum of
    > surfaces of all cathodes present.

    Thanks. This is what i want to know.

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