Pretreatment of aluminium prior to application of a powder coating is required to ensure satisfactory adhesion between the metal and the powder coating and that this adhesion is not impaired by subsequent corrosion of the aluminium surface.This note summarises the current changes affecting the specification of powder coatings on architectural aluminium and provides interim information for specifiers. These changes are due to the;
- Likely phasing out the use of chromate pretreatment on architectural aluminium,
- Withdrawal of BS 6496 and its replacement with BS EN 12206-1.
As the situation becomes clearer further guidance will be issued.
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