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  2. Electrometallurgy - Wikipedia

    en.wikipedia.org/wiki/Electrometallurgy

    The electrolysis can be done on a molten metal oxide (smelt electrolysis) which is used for example to produce aluminium from aluminium oxide via the Hall-Hérault process. Electrolysis can be used as a final refining stage in pyrometallurgical metal production (electrorefining) and it is also used for reduction of a metal from an aqueous metal ...

  3. Hall–Héroult process - Wikipedia

    en.wikipedia.org/wiki/Hall–Héroult_process

    The baking process in Söderberg anodes during electrolysis releases more carcinogenic PAHs and other pollutants than electrolysis with prebaked anodes and, partially for this reason, prebaked anode-using cells have become more common in the aluminium industry. More alumina is added to the electrolyte from the sides of the Söderberg anode ...

  4. Electrochemical machining - Wikipedia

    en.wikipedia.org/wiki/Electrochemical_machining

    7: Metal hydroxide. Electrochemical machining (ECM) is a method of removing metal by an electrochemical process. It is normally used for mass production and for working extremely hard materials, or materials that are difficult to machine using conventional methods. [1] Its use is limited to electrically conductive materials.

  5. Electrolysis - Wikipedia

    en.wikipedia.org/wiki/Electrolysis

    The key process of electrolysis is the interchange of atoms and ions by the removal or addition of electrons due to the applied potential. The desired products of electrolysis are often in a different physical state from the electrolyte and can be removed by mechanical processes (e.g. by collecting gas above an electrode or precipitating a ...

  6. Aluminium smelting - Wikipedia

    en.wikipedia.org/wiki/Aluminium_smelting

    The Hall-Héroult electrolysis process is the major production route for primary aluminium. An electrolytic cell is made of a steel shell with a series of insulating linings of refractory materials. The cell consists of a brick-lined outer steel shell as a container and support. Inside the shell, cathode blocks are cemented together by ramming ...

  7. Rust - Wikipedia

    en.wikipedia.org/wiki/Rust

    Rust is a general name for a complex of oxides and hydroxides of iron, [4] which occur when iron or some alloys that contain iron are exposed to oxygen and moisture for a long period of time. Over time, the oxygen combines with the metal, forming new compounds collectively called rust, in a process called rusting.

  8. Electrolytic process - Wikipedia

    en.wikipedia.org/wiki/Electrolytic_process

    An electrolytic process is the use of electrolysis industrially to refine metals or compounds at a high purity and low cost. Some examples are the Hall-Héroult process [ 1 ] used for aluminium , or the production of hydrogen from water .

  9. Plasma electrolytic oxidation - Wikipedia

    en.wikipedia.org/wiki/Plasma_electrolytic_oxidation

    This process can be used to grow thick (tens or hundreds of micrometers), largely crystalline, oxide coatings on metals such as aluminium, magnesium [2] and titanium. Because they can present high hardness [ 3 ] and a continuous barrier, these coatings can offer protection against wear , corrosion or heat as well as electrical insulation .

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