Add to ORKGCoating systems on 82 Norwegian and 32 Swedish steel bridges were studied to determine the better suited alternative for corrosion protection from a lifetime economical perspective. The studied coatings were duplex thermally sprayed zinc (TSZ) with alkyd coating, inorganic zinc (IOZ) with organic top coating and organic zinc (OZ) epoxy primer coating with top coating. The duplex coating was expected to last 69 years without repair in C2 environments, while the IOZ were expected to last 55 years and the OZ were expected to last 33 years in C2 corrosive environments based on a coating performance indicator (CPI). The performance is inversely linked to corrosivity of the environment. Maintenance cost during the bridges life was found to be the...