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Manganese Electrowinning Pieces Source: Found, Lab Purity: 99.9% Some of these are oxidized, some are not. I haven't bothered to separate them out. The surfaces are characteristic of electrowinning, a method of extracting metals from a solution using electric current. In this process, a solution containing the metal ions to be extracted is put into a tank with 'transfer plates,' or large plates for plating out the metal. A current is applied and the metal adheres to the plates in sheets. This produces the characteristic finish - one smooth side, one lumpy, 'stingray skin' side. |