Even though aluminum is generally highly resistant to corrosion, even when protected with powder coatings such as anodising or painting, it may still suffer from atmospheric oxidisation – though not harmful, this process can erode curb appeal of buildings.
Maintaining powder coated aluminium requires regular care and maintenance to stay in good condition, and this article explains how. Here are the steps involved:
Cleaning
Powder coated aluminum is designed to withstand rust and other forms of damage, but over time can become discolored and dirty. To maintain its appearance as new, it’s crucial that it is regularly maintained by cleaning.
Use a cloth or sponge to gently wipe away loose dirt and debris from aluminium surfaces, taking care to avoid using any abrasive cleaning materials that could scratch or damage its powder coating. For stain removal purposes, if any are present it would be prudent to use mild detergent or commercial cleaner specifically made for aluminium surfaces.
Always rinse aluminium thoroughly to eliminate any cleaner residue, then use a soft cloth or sponge to dry the surface. Following these simple steps can keep powder coated aluminium looking brand new for years.
Sanding
Powder coating provides excellent protection from corrosion, UV rays and other environmental threats, but to maintain its effectiveness it must be properly maintained and regularly cleaned to stay in top condition. Regular inspection and cleaning is vital to this goal.
One way of accomplishing this goal is through the use of a media blaster, which will effectively remove old coating while also cleaning and prepping aluminium for repainting. However, be sure to follow manufacturer’s instructions and choose an appropriate nozzle based on your particular application.
An easy way to restore powder coated aluminium is by applying a primer specifically formulated for its alloy. When dry, it should be sanded down before painting begins. Make sure you select a primer suitable for your application by testing a small area first and abrading further if the primer smears; this will ensure that new coat of paint adheres well.
Primer
Once your surface has been cleaned, sanded, and tacked it’s time to apply primer. There is an array of primers designed specifically for powder coated aluminium which should work perfectly well; choose wisely! Common options include Zinc Rich, Zinc Free and Outgas Forgiving (OGF) options.
Before applying any primer, the first step should be masking off any areas you do not intend to paint using masking paper, plastic sheeting or decorators’ tape. Once this step has been completed, apply a thin coat of your chosen primer directly over any exposed aluminium surfaces using either spray-on primers or airless sprayers.
Once the primer has set, it’s time to paint. Use only high quality exterior-grade paint suitable for powder coating; and select one compatible with the primer so that the topcoat adheres properly to its surface.
Painting
Though aluminium may be lightweight and strong, it does need protection from the elements and wear & tear in order to stay looking its best and continue functioning at an optimum level. Powder coating offers plenty of protection in terms of durability, moisture resistance and surface protection – ideal choices when considering aluminum solutions.
Prior to beginning any repainting project, it is essential that the surface be prepared appropriately. This may require sanding the area lightly so the paint bonds more securely and utilizing an aluminum or steel-specific primer for best results.
Once sanding and priming have been completed, it’s time to paint! Before beginning painting, always conduct a test spot of primer by applying some to scrap and wiping off quickly; if any flaking occurs or it smears off easily then further work must be done on the surface before continuing.