FIELD: corrosion protection of metal structures under conditions of frequent wetting. SUBSTANCE: electrode 3 additionally introduced in the device. The electrode has positive potential as compared to the potential of the metal structure being protected. Hygroscopic interlayer 5 impregnated with electrolyte is located between anode 1 and additional electrode 3. As humidity degree changes internal resistance of hygroscopic interlayer 5 changes and protective current density changes too. EFFECT: protective device life increase. 1 dwg
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