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14.Corrosion situation of unprotected ground screw in marine environment
Conditions | Salt water | Fresh water |
Water at surface: | 100 um/year | 50 um/year |
Salt water in splash zone: | 300 um/year | 200 um/year |
Below the water level: | 100 um/year | 100 um/year |
Bottom sediment: | 50 um/year | 20 um/year |