以某3 400 m³碳钢注水罐内表面强制电流阴极保护辅助阳极用量计算及布置为例,对比了三种辅助阳极布置方案,讨论了阳极串数量,单串中阳极的数量,阳极与罐壁、罐底和液面的距离等对注水罐内表面强制电流阴极保护系统中辅助阳极布置有效性的影响。结果表明:采用方案三的防护效果最佳。辅助阳极布置过程中,需要进行阳极串最上方阳极顶部与储罐内液面的距离、2. 5S_ab(阳极串的底部与罐底间的距离)等参数的计算和核算,确定罐壁各部位均处于保护,从而确保采取的阳极设置方案合理有效。

Taking the calculation and arrangement of auxiliary anodes for impressed current cathodic protection on the inner surface of a 3 400 m³ carbon steel water injection tank as an example, three auxiliary anode arrangement schemes were compared. The effects of the number of anode strings, the number of anodes in a single string, and the distance among anodes and tank walls, bottom, and liquid level on the effectiveness of auxiliary anode arrangement in the cathodic protection system on the inner surface of the water injection tank were discussed. The results showed that the protection effect was respectively good when using Scheme 3. In the process of auxiliary anode layout, it was necessary to calculate and chech the parameters such as the distance between the top of the anode string and the liquid level in the tank, 2. 5S_ab which was to distance between the bottom of the anode string and the tank bottom, to ensure that the surface of each part of the tank wall was protected, and to ensure that the adopted anode setting scheme was reasonable and effective.