Chemical burnishing is applied to surfaces to obtain a medium lustre. Burnishing is often applied together with glass bead blasting and grinding to enhance the structure of the metal.
- Burnishes the whole material regardless of the geometry of the material.
- Decorative articles
- New technical articles where burnishing is needed on intricate geometrical shapes.
Effect on scratches and small damages in the surface
- Scratches, etc. are not efficiently removed.
- Marks from the extrusion are vaguely visible.
- Removes the natural oxide layer.
Structure and appearance after treatment
- Medium lustre
- More matt finish compared to the mechanical burnishing
- Aluminum alloys
- Alloys based on AIMg and AIMgSI
- Pure alloys such as A1 99.5
- Pure alloys that give a stronger lustre
- Alloys containing copper should be avoided