How does saltwater exposure accelerate corrosion in untreated wrought iron outdoor chairs?

Saltwater exposure significantly accelerates corrosion in untreated wrought iron outdoor chairs due to a combination of chemical and electrochemical reactions. The high salinity in seawater acts as an electrolyte, facilitating the transfer of electrons between iron and oxygen, which speeds up the oxidation process. Chloride ions in saltwater are particularly aggressive, breaking down the passive oxide layer that might otherwise slow rust formation. Additionally, saltwater increases conductivity, enhancing galvanic corrosion when dissimilar metals are present. Without protective coatings, wrought iron chairs exposed to saltwater environments will develop rust faster, leading to structural weakening and aesthetic degradation over time. Regular maintenance and protective treatments are essential to prolong their lifespan in coastal areas.