针对牙哈装车南站储罐底板的腐蚀现象和施加阴极保护后储罐底板中心电位难测得等问题,建立了储罐底板保护电位分布模型, 分析了牙哈装车南站1号储罐的底板16个特殊点与储罐底板中心的电位差大小。结果表明, 储罐边缘与储罐底板中心处的电位值不相同, 罐边缘处的电位与罐中心的电位相差较大。根据电位差分布规律, 在设计和生产过程中要求储罐底板中心的电位值应达到保护状态。

For the corrosion at the bottom of the steel tank in Yaha loading south station and the difficulty for measuring the center potential of the tank after applying cathodic protection, a protective potential distribution model at the tank bottom was established. The potential difference between special positions and the bottom center in Yaha loading south station was aralyzed. The results showed that the potentials at the edge and the bottom of the tank were not the same, the potential difference of them was great. According to the distribution of potential difference, the potential at the center of the tank bottom should reach the protection status in the processes of design and production.