钢筋混凝土阴极保护体系中的电流分布

Current Distribution in Reinforced Concrete Cathodic Protection System

摘要:

在采用碳纤维水泥基材料作为铺覆式阳极的条件下，用实验的方法,研究了对三层排布的钢筋混凝土结构进行阴极保护时的保护电流分布问题.讨论了钢筋初始腐蚀状态、混凝土电阻率以及不同外加电流密度对电流分布均匀性的影响.结果表明，钢筋初始腐蚀速率和混凝土电阻率均对保护电流分布有较大影响，而不同的电流密度仅对腐蚀较严重的钢筋内的电流分布造成影响.该研究对于现场条件下的钢筋混凝土结构的阴极保护提供了有价值的信息.

Abstract:

The protection current distribution was investigated in a three layer reinforced concrete cathodic protection system, with carbon fiber reinforced cement based material as the conductive coating anode. The influence of steel bars’ initial current state, concrete resistivity and magnitude of applied current density on the current distribution was discussed, respectively. The results show that both the initial corrosion rate of rebars and concrete resistivity have a great effect on the protection current distribution. However, the magnitude of impressed current density only affects the uniformity of current distribution to some extent when the rebars are corroding severely. This study contributes to the cathodic protection of reinforced concrete structures in field condition.