外部電源法による陰極防食下の塗装鋼板における過防食域について

概要

論文の詳細を見る
In the impressed-current method used for cathodic protection of ship hull, the overprotection field around the anode reaches 40〜50m^2, because the electric current of a few tens of ampere is supplied from one anode. Thereupon, the insulated coatings of 2〜8 times of the thickness in comparison with other portion on ship hull surface should be applied to this region. In the numerical analysis of a electric field in the cathodic protection by impressed-current method, the scope of the insulated resigons requared for avioding overprotection around anodes must be given as input data. In this paper, the estimation formula giving areas of the insulated resigons based on the shape of the protected body and the anticipated protection electric current was established. Although the insulated area has been empirially obtained in practice, this formurization may be very useful for the automatical optimization of the impressed-current cathodic protection system with aid of computer.
社団法人日本船舶海洋工学会の論文
1992-09-04