Storage before anodising
To secure the materials before anodising, they must be stored indoors and in a relatively dry environment. If this is not possible it is advised to apply a protective anodising of 5µm – or to apply a foil, as either options prevent corrosion and thus preventing holes in the final anodising. HAI can handle both.
The items for anodising should be packaged for shipment. The purpose of the packaging is to protect the items against scratches, etc. which easily occur on aluminum which is a light material.
- Sheets: Wooden frames
- Sections: Packaged in cardboard with paper or plastic dividing the visible surfaces and a wooden frame.
Any damages to the material take grinding and potentially brushing off before the following treatment.
Pickling, which takes place before the anodising can only remove damages partly. Aluminum building components must not be exposed to bumps or scratches. Therefore aluminum building components must not be installed until after all masonry, stucco, plastering and sheet work is finished, this is to ensure that no damages are caused by spilled lime and cement on the surfaces.
Building components that have an alkaline effect, especially during the hardening phase, will cause corrosion to the oxide layer.
This is why building components must be washed with water liberally.
If masonry and plastering work is not carried out until after the aluminum parts have been installed, the aluminum must be covered with a synthetic foil material. The foil material must be applied, so the pieces overlap each other. On window frames which are mainly covered from acidic and alkaline solutions, the foil material must be applied from bottom to top to improve water drainage.