How does galvanic corrosion affect metal outdoor sofas when different metals are combined?

Galvanic corrosion occurs when two dissimilar metals come into contact in the presence of an electrolyte, such as moisture or saltwater, leading to accelerated deterioration of the more reactive metal. For metal outdoor sofas combining materials like aluminum and steel, this electrochemical reaction can cause rust, pitting, and structural weakening over time. The anode (less noble metal, e.g., steel) corrodes faster, while the cathode (more noble metal, e.g., aluminum) remains protected. To mitigate this, use insulating barriers (e.g., rubber gaskets), choose compatible metals, or apply protective coatings like powder coating or galvanization. Regular cleaning and drying also reduce moisture exposure, slowing corrosion. Understanding these principles helps maintain the durability and appearance of mixed-metal outdoor furniture.