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A major client encountered a situation, whereby a main steelwork fabrication, which had been erected and was in-situ on a finished project, was showing signs of corrosion at three hundred spigot/box section interfaces. These areas could not be accessed; therefore no conventional cleaning/shotblasting and painting could be carried out. ARS UK Ltd’s technical services realised that for corrosion to form an Anode-Cathode-Electrolyte triangle must be present, forming a ‘triangle of corrosion’. To prevent the corrosion one of the legs of the triangle must be removed. An innovative and elegant solution was devised for introducing a sacrificial anodic coating to all of the affected areas, thus removing the electrolyte and offering an Active as well as Passive protection, which even if slightly damaged is still effective.