Saltwater corrosion causes $2.5B annual damage to marine structures globally. Through 15 years of coastal project experience, we've identified 316L stainless round bars as optimal for pier pilings due to molybdenum-enhanced pitting resistance. Hexagon bars with electropolished surfaces prove vital for offshore ladder rungs, reducing slip accidents by 60%. Our corrosion mapping service helps engineers identify high-risk zones in seawater intake systems, recommending duplex steel flat bars where chloride concentrations peak.