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CP 50
I.4.1
General
For technical and aesthetic reasons a protective coating can be applied to aluminium. To preserve the
original look and the quality of this coating as well as possible it is necessary to remove adhering dirt.
It is clear that periodical cleaning considerably contributes to a long service life of the aluminium
constructions and to the preservation of their original look (see chapter 7).
The protection of aluminium elements can be achieved by painting or anodizing. In all cases the
aluminium used should be composed of the correct alloy and possess the mechanical properties as
prescribed (see chapter 3).
I.4.2
Painting
4.2.1 General
•
The painting process is carried out in accordance with the Qualicoat regulations.
•
The powder particles are applied according to the electrostatic powder coating process and baked
at 200°C.
•
All parts in direct contact with the outside atmosphere should be protected by a paint coating with
an average thickness of 60 micrometres. The minimum value should be 48 micrometres. There
are no requirements as to maximum thickness.
•
In case of painted constructions fitted near the coast (< 10 km), in an industrial area or in a very
aggressive atmosphere (e.g. swimming pools, laboratories,...), a specific painting process should
be applied after prior agreement with Reynaers.
4.2.2 Control look
•
The paint coating should be even with regard to colour and gloss and should cover well. When the
lot is checked no disturbing differences in colour and gloss between the separate elements may
be noticeable.
- For outside applications an assessment distance of 5 metres is applied.
- For inside applications an assessment distance of 3 metres is applied.
The paint coating may not show any damage on the direct visible side due to which the base
metal becomes visible. When looking at the painted visible sides, perpendicular to the surface, no
disturbing defects may be visible during the entry control, such as:
- rough surface;
- bubbles;
- orange effect;
- inclusions;
- craters;
- dull spots;
- holes;
- scratches.
•
On indirect visible surfaces the paint should be applied in such a way that the base material is no
longer visible.
I.4.3
Anodizing
4.3.1 General
•
By anodizing is meant: the electrochemical application of an oxide coating, specifically for
aluminium, in accordance with the requirements as formulated by EWAA-EURAS in the Qualanod
regulations. This coating protects the aluminium against corrosion. It can be obtained in different
colours which enhances its aesthetic value. Apart from this a different look can be achieved by
means of a preliminary treatment, e.g. brushing.
•
Consultation between customer and supplier regarding the choice of finishing and colour is
strongly advisable. We also recommend having test samples made of both profiles and sheets to
be used.
•
The coating thickness of the anodization should meet class 20 of Qualanod for elements exposed
to the outside atmosphere. This means that the average coating thickness should be at least 20
micrometres.
•
In case of anodized constructions fitted near the coast (< 10 km), in an industrial area or in a very
03/2003
Información general sistema
Généralités séries
General information systems
Allgemeine Information Systeme
PRESCRIPCIONES DE TRATAMIENTO
RECOMMANDATIONS DE TRAITEMENT
PROCESSING DATA
VERARBEITUNGSVORSCHRIFTEN
37.B.053
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