Etching and descalling of aluminium
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- Etching and descaling of Aluminium
Example flowsheet:
Literature: BAT for the Surface Treatment of Metals & Plastics, 2006
- Typical parameters of the process
| Process | Temperature [°C] | Residence time | Chemicals | Concentration [g/l] | Details | Literature |
| Etching of aluminium | Sodium hydroxide (some flourides added if necessary) | BAT for the surface treatment of metals & plastics, 2005 | ||||
| Decorative etching of aluminium | 40-90 | Sodium hydroxide | 4-10% | |||
| Acid etching solution | up to 55 | Sulfuric acid (40° BE): 18 l, NaCl (20° BE): 7,5 l, HF(60%): 6l, radical vinegar: 2,5 l, oxalic acid: 240 g, water: fill up to 100 l | Metal memoval:7-35 μm/min | Oberflächenbehandlung von Aluminium; T.W. Jelinek, Eugen G. Leue Verlag, D- 88348; 1997 |
