5. What method of protection against corrosion in sea water of the steel body of a floating crane at pH≈7 is used at the berths (f0Znn /Zn= - 0.76, V; f0Fe2 /Fe = 0.44, V): a) tread protection; Zn - protector; b) zinc coating; c) cathodic protection. Give a diagram of a galvanic cell operating during steel corrosion in sea water, write down the corrosion processes.

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