ANTI-FOULING METHOD AND DEVICE FOR UNDERWATER STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a means exhibiting satisfactory sterilization effect and capable of suppressing the corrosion of a corrosion resistant metal in the electrochemical control for microorganism on the surface of underwater structure made of the corrosion resistant metal. SOLUTION: The anti-fouling method of the surface of the underwater structure is performed by forming the anti-fouling surface of the underwater structure from the corrosion resistant metallic material and applying alternately and periodically positive potential and negative potential on the anti-fouling surface. The applying time of negative potential applied on the anti-fouling surface is controlled to be longer than that of the positive potential, that is, to be 2-20 times of that of the positive potential. The positive potential applied on the anti-fouling surface is controlled to be <=+1.5 V vs. SCE and the negative potential is controlled to be -0.1 to -1.0 V vs. SCE. The cycle of applying the positive potential and the negative potential on the anti-fouling surface is controlled to be <=60 min.