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  2. Electroless nickel immersion gold - Wikipedia

    en.wikipedia.org/wiki/Electroless_nickel...

    The gold is typically applied by quick immersion in a solution containing gold salts. Some of the nickel is oxidized to Ni 2+ while the gold is reduced to metallic state. A variant of this process adds a thin layer of electroless palladium over the nickel, a process known by the acronym ENEPIG. [1]

  3. Gold plating - Wikipedia

    en.wikipedia.org/wiki/Gold_plating

    The thickness of gold plating on jewellery is noted in microns (or micro-meters). The microns of thickness determines how long the gold plating lasts with usage. The jewellery industry denotes different qualities of gold plating in the following terminology Gold flashed / Gold washed - gold layer thickness less than 0.5 micron

  4. Plating - Wikipedia

    en.wikipedia.org/wiki/Plating

    Plating is a finishing process in which a metal is deposited on a surface. Plating has been done for hundreds of years; it is also critical for modern technology. Plating is used to decorate objects, for corrosion inhibition, to improve solderability, to harden, to improve wearability, to reduce friction, to improve paint adhesion, to alter conductivity, to improve IR reflectivity, for ...

  5. Rule based DFM analysis for forging - Wikipedia

    en.wikipedia.org/wiki/Rule_Based_DFM_analysis...

    One variation of impression-die forging is called flashless forging, or true closed-die forging. In this type of forging the die cavities are completely closed, which keeps the workpiece from forming flash. The major advantage to this process is that less metal is lost to flash. Flash can account for 20 to 45% of the starting material.

  6. Electrowinning - Wikipedia

    en.wikipedia.org/wiki/Electrowinning

    In electrowinning, an electrical current is passed from an inert anode through a leach solution containing the dissolved metal ions so that the metal is recovered as it is reduced and deposited in an electroplating process onto the cathode. In electrorefining, the anode consists of the impure metal (e.g., copper) to be refined. The impure ...

  7. Angel gilding - Wikipedia

    en.wikipedia.org/wiki/Angel_Gilding

    Still from the instructional video "Creating a Mirror on Glass: Silver & Gold" Angel gilding is gilding glass or gold plating by electroless chemical deposition. Gold chloride is dissolved in water, mixed with other chemicals and poured on clean glass that has been treated with stannous chloride. [1] The gold layer is delicate and usually ...

  8. Electropolishing - Wikipedia

    en.wikipedia.org/wiki/Electropolishing

    Electropolishing, also known as electrochemical polishing, anodic polishing, or electrolytic polishing (especially in the metallography field), is an electrochemical process that removes material from a metallic workpiece, reducing the surface roughness by levelling micro-peaks and valleys, improving the surface finish.

  9. Electroforming - Wikipedia

    en.wikipedia.org/wiki/Electroforming

    Electroforming process Electroforming is a metal forming process in which parts are fabricated through electrodeposition on a model, known in the industry as a mandrel . Conductive (metallic) mandrels are treated to create a mechanical parting layer, or are chemically passivated to limit electroform adhesion to the mandrel and thereby allow its ...