Powder coated aluminium needs to be cleaned and maintained regularly to ensure the decorative and protective properties of the coating are retained. The frequency of such cleaning will depend on many factors including:
- The geographical location of the building
- The environment surrounding the building, i.e. marine, industrial, alkaline/acidic etc.
- Levels of atmospheric pollution
- Prevailing wind
- Protection of the building by other buildings
- Possibility of airborne debris (e.g. sand) causing erosive wear of the coating
The recommended method of cleaning is by regular washing using a solution of warm water and mild detergent. All surfaces should be cleaned using a soft cloth or sponge and a liberal quantity of water, using nothing harsher than natural bristle brushes. (Cleaning of window sections can be conveniently carried out at the same time as glass cleaning).
Where heavier soiling on the coating is encountered, nothing harsher than white spirit should be used for cleaning and in no circumstances should any abrasive cleaner or any cleaner containing ketones, esters or alcohols be used.
The frequency of cleaning depends in part on the standard of appearance that is required and also the requirement to remove deposits which could, during prolonged contact with either the powder film or the metal substrate (if exposed), cause damage. windows coatings left for extended periods without cleaning will suffer and won't come back to the original appearance.
In industrial environments the normal frequency of cleaning should be no more than three monthly intervals. However where there is high atmospheric pollution or an extremely hazardous atmosphere cleaning should occur monthly. Where the atmosphere is deemed to be non-hazardous i.e. rural or where "clean environments" have been declared then the period between cleaning frequency can be extended to six monthly.
However if the project is subject to any unusual environmental factors or is close to salt water or marine environment your powder coater must be consulted on an industrial basis.