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!
You want to know everything about the metallographic preparation of aluminum: discover our new Lab’Note!
Aluminum (x50) after etching with Keller reagent
![aluminium-attaque-reactif-keller](https://www.presi.com/wp-content/uploads/2022/03/aluminium-attaque-reactif-keller.webp)
Process
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:
Etching: