Abstract：Based on the serious corrosion of marine steel structure in splash zone and tidal zone, two new types of outer wrapping
anticorrosive system (new PTC coating anticorrosive system and Denso cold-applied petrolatum taping system) are adopted
for the first time in Tianjin port, which were used to solve the coating damage problem of a steel pipe pile wharf in tidal zone and
have a good repair result, accumulating valuable experience in anticorrosive repair of steel pipe piles in Tianjin Port area.