Mechanically resistant, with good corrosion resistance, a good thermal and electrical conductor and a relatively low density, aluminum has won over many sectors of activity!
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Aluminum (x50) after etching with Keller reagent
First pre-polishing step:
Second polishing step with diamond suspension on resin-bond disc:
Third polishing step with polycrystalline diamond suspension:
Fourth finishing step with polycrystalline diamond suspension:
Fifth super finishing step with Colloidal Silica: