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How does wrought iron resist chloride penetration?
Wrought iron is renowned for its exceptional resistance to chloride penetration, a key factor in its durability and longevity. Unlike other metals, wrought iron contains a high percentage of pure iron with minimal carbon content, which reduces its susceptibility to chloride-induced corrosion. The presence of slag fibers in its microstructure forms a natural barrier, slowing down the diffusion of chloride ions. Additionally, the formation of a stable oxide layer (patina) on the surface further shields the metal from aggressive chloride environments. This combination of inherent properties makes wrought iron an ideal choice for coastal and industrial applications where chloride exposure is high. Proper maintenance, such as regular coatings or galvanization, can enhance its resistance even further, ensuring long-term structural integrity.
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