The straightforward answer is: yes, untreated wrought iron can rust over time when exposed to the elements. However, modern wrought iron urban outdoor furniture is almost never left untreated. The key to its longevity lies in its protective finishes.
Rust, or iron oxide, forms when iron is exposed to oxygen and moisture—conditions common in outdoor settings. Manufacturers combat this through robust protective barriers. The most common and effective is powder coating. This process electrostatically applies a dry powder to the metal, which is then cured under heat to form a hard, uniform shell that is far more durable than traditional paint. This coating seals the iron from moisture and oxygen.
For true longevity, maintenance is simple but crucial:
1. Regularly clean with mild soap and water.
2. Inspect for chips or scratches in the coating.
3. Touch up any damaged areas with matching paint to prevent rust from starting.
4. Use protective covers during harsh weather if possible.
High-quality wrought iron furniture, with its proper powder-coated finish and minimal care, is specifically engineered to resist rust for many years, making it an excellent and durable choice for urban balconies, patios, and rooftops. Its strength and classic aesthetic ensure it remains a popular option for outdoor spaces.