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  2. Anode - Wikipedia

    en.wikipedia.org/wiki/Anode

    The terms anode and cathode are not defined by the voltage polarity of electrodes, but are usually defined by the direction of current through the electrode. An anode usually is the electrode of a device through which conventional current (positive charge) flows into the device from an external circuit, while a cathode usually is the electrode through which conventional current flows out of ...

  3. Galvanic cell - Wikipedia

    en.wikipedia.org/wiki/Galvanic_cell

    In the copper half-cell, the copper ions plate onto the copper electrode (reduction), taking up electrons that leave the external conductor. Since the Cu ++ ions (cations) plate onto the copper electrode, the latter is called the cathode. Correspondingly the zinc electrode is the anode. The electrochemical reaction is

  4. Cathode - Wikipedia

    en.wikipedia.org/wiki/Cathode

    Diagram of a copper cathode in a galvanic cell (e.g., a battery). Positively charged cations move towards the cathode allowing a positive current i to flow out of the cathode. A cathode is the electrode from which a conventional current leaves a polarized electrical device such as a lead-acid battery.

  5. Galvanic series - Wikipedia

    en.wikipedia.org/wiki/Galvanic_series

    The difference can be measured as a difference in voltage potential: the less noble metal is the one with a lower (that is, more negative) electrode potential than the nobler one, and will function as the anode (electron or anion attractor) within the electrolyte device functioning as described above (a galvanic cell).

  6. Galvanic anode - Wikipedia

    en.wikipedia.org/wiki/Galvanic_anode

    Since the operation of a galvanic anode relies on the difference in electropotential between the anode and the cathode, practically any metal can be used to protect some other, providing there is a sufficient difference in potential. For example, iron anodes can be used to protect copper. [13]

  7. Electroplating - Wikipedia

    en.wikipedia.org/wiki/Electroplating

    At the cathode, the Cu 2+ is reduced to metallic copper by gaining two electrons. When the anode is made of the metal that is intended for coating onto the cathode, the opposite reaction may occur at the anode, turning it into dissolved cations. For example, copper would be oxidized at the anode to Cu 2+ by losing two electrons. In this case ...

  8. Electrode - Wikipedia

    en.wikipedia.org/wiki/Electrode

    In a vacuum tube or a semiconductor having polarity (diodes, electrolytic capacitors) the anode is the positive (+) electrode and the cathode the negative (−). The electrons enter the device through the cathode and exit the device through the anode. Many devices have other electrodes to control operation, e.g., base, gate, control grid.

  9. Copper electroplating - Wikipedia

    en.wikipedia.org/wiki/Copper_electroplating

    A copper anode is also immersed in the solution. During plating, a direct electric current is applied to the cell which causes the copper in the anode to dissolve into the electrolyte through oxidation, losing electrons and ionizing into copper cations.

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