Effects of Corrosion on Lighting

Signs & Preventions

What is corrosion?

Corrosion occurs when materials like certain metals (aluminium, steel, copper, brass) breakdown due to a chemical reaction to the environment. This can weaken the structural integrity of metal products overtime, and potentially weakens its use, making it hazardous and costly long-term if left untreated.

What are the signs?

Corrosion can take form in numerous ways with different metals reacting differently to the environment.

The most common signs are:

Rust - A coating or cluster on iron and iron-based alloys (e.g. steel) that range from a bright orange to a reddish brown. It can be brittle and easily crumble through long-exposure.
Patina - A thin, distinct colour produced on the surface of certain metals after long exposure to the air. Usually alters the colour of the material. For example: Copper usually goes to a blue-green colour and Bronze goes to deep brown and green colours.
Tea Staining - A spattered brown or yellow discoloration that appears on stainless steel surfaces.
Pitting - A localised form of corrosion that can occur in small specific areas of a product or spread extensively. Creates holes.
Crevice - Appears in confined or narrow spaces where moisture and grime are trapped such as under bolts or where clamp hardware are used. Presents as a rust of dark brown stain.

How to Prevent Corrosion?

Select products that are resistant to corrosion - Use metals like stainless steel, aluminium, copper and brass.
Apply protective coating - Powder coating is highly effective against corrosion as it creates an impermeable barrier between metal and natural elements.
Pick appropriate IP rating - Choose lightings with high IP rating such as IP67 or IP68 to provide strong protection against moisture and dust which in turn, can reduce risk to corrosion
.
Seal components and crevices - Sealing components or areas prone to corrosion can prevent accumulation to air and ensure natural elements don't interact with lighting finishes.
Plan for maintenance - Have routine inspections for rust or surface damage, clean lightings and if needed, replace worn out or corroded parts.

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Regular Maintenance Matters!

Outdoor and Indoor lights should be inspected periodically, especially during rapid changes in weather conditions such as heavy rain, high humidity levels or high wind levels . If corrosion is present, clean and reapply protective coating to strengthen the lighting against ongoing or future corrosions. Keeping lights clean, well-sealed, and properly coated will maintain their performance and longevity. With the right care, coast suitable lighting will remain strong, bright and safe against forms of corrosion.