Cleaning & Handling Aluminium

Preventing and Addressing Water Staining

Water staining is a common issue with aluminum and typically appears as a white powdery residue. In some cases, it can have an iridescent sheen, particularly with high magnesium alloys. Water staining doesn’t affect the aluminum’s mechanical properties, but it can affect its appearance.

To prevent water staining:

• Ensure that aluminum materials are dry before storage. If materials are delivered wet, allow them to dry completely using dry air to evaporate any moisture.
• Proper ventilation and air circulation between closely packed aluminum surfaces can prevent moisture entrapment, which causes staining.

To remove existing water stains:

• Light stains can be brushed off easily.
• For more severe staining, use an aqueous solution containing 10% by volume sulfuric acid and 3% by weight chromic acid.

Receiving Aluminium Deliveries

When receiving aluminum components, it is essential to inspect the materials for any signs of damage or moisture that could lead to corrosion or staining. Steps to take include:

• Check protective plastic or paper coatings for damage that may have transferred to the aluminum.
• Inspect for wet packaging or signs of dampness, which could lead to water staining.
• Move aluminum indoors immediately on damp or rainy days to prevent moisture exposure.

Handling Aluminium

Aluminium requires careful handling to avoid surface damage or distortion. Best practices for handling aluminum include:

• Avoid dragging aluminum across hard or sharp surfaces to prevent scratches.
• Use two people when handling large aluminum sheets to avoid dragging them across one another.
• Never drag or throw aluminum components, as this can cause dents or deformation.
• Use soft slings when lifting heavy aluminum components to avoid damaging the surface.
• Avoid walking on aluminum sheets during transportation or installation.