| 摘要 |
<p>A method of supplying a D.C. current comprising using a steel product disposed inside a prestressed concrete as a cathode, disposing an anode at a surface portion of the concrete and/or at a part inside the concrete and applying a voltage higher than a hydrogen generation potential between the both electrodes, wherein an effective tensile force acting on the PC steel material disposed inside the concrete is not greater than 80 % of the tensile strength of the PC steel material; and a method of supplying a D.C. current comprising using a steel product disposed inside a prestressed concrete as a cathode, disposing an anode at a surface portion of the concrete and/or at a part inside the concrete and applying a voltage higher than a hydrogen generation potential between the both electrodes, characterized in that a period in which the voltage becomes less than the hydrogen generation potential is provided at least once during the current supply processing and thereafter the current supply processing is started at a voltage higher than the hydrogen generation potential.</p> |
