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  2. Wohlwill process - Wikipedia

    en.wikipedia.org/wiki/Wohlwill_process

    The process was invented in 1874 by Emil Wohlwill. This electrochemical process involves using a cast gold ingot, often called a doré bar, of 95%+ gold to serve as an anode. Lower percentages of gold in the anode will interfere with the reaction, especially when the contaminating metal is silver or one of the platinum group elements.

  3. Gold parting - Wikipedia

    en.wikipedia.org/wiki/Gold_parting

    Invented by Emil Wohlwill in 1874, the Wohlwill process produces the highest purity gold (99.999%). It is an electrolytic process using pure gold for the cathode (or titanium as a starter cathode) and chloroauric acid (gold chloride-hydrochloric acid) as the electrolyte; this is made by dissolving gold with chlorine gas in the presence of ...

  4. Anodizing - Wikipedia

    en.wikipedia.org/wiki/Anodizing

    Anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts. The process is called anodizing because the part to be treated forms the anode electrode of an electrolytic cell.

  5. Electroplating - Wikipedia

    en.wikipedia.org/wiki/Electroplating

    Copper electroplating machine for layering PCBs. Electroplating, also known as electrochemical deposition or electrodeposition, is a process for producing a metal coating on a solid substrate through the reduction of cations of that metal by means of a direct electric current.

  6. Electrolytic process - Wikipedia

    en.wikipedia.org/wiki/Electrolytic_process

    The video describes the electrolytic process as it is occurring on Captain Kidd's Cannon, which is on display and currently undergoing the 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 ...

  7. Copper foil - Wikipedia

    en.wikipedia.org/wiki/Copper_foil

    Copper foil is a thin sheet of copper metal that is widely used in various applications due to its excellent electrical conductivity, malleability, and corrosion resistance. It is an essential material in the electronics industry, especially for manufacturing printed circuit boards (PCBs) and other electronic components.

  8. Exchange current density - Wikipedia

    en.wikipedia.org/wiki/Exchange_current_density

    The Tafel equation describes the dependence of current for an electrolytic process to overpotential. The exchange current density is the current in the absence of net electrolysis and at zero overpotential. The exchange current can be thought of as a background current to which the net current observed at various overpotentials is normalized.

  9. Chemistry of pressure-sensitive adhesives - Wikipedia

    en.wikipedia.org/wiki/Chemistry_of_pressure...

    The adhesive is coated onto a flexible material (the backing) such as paper, foil, fabric, or plastic film (such as biaxially oriented polypropylene or polyvinyl chloride [6] [9]) to provide strength and protect the adhesive from degradation by environmental factors including humidity, temperature, and ultraviolet light. Backing tensile ...

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