应用电化学联合保护新技术 ,通过冷却管管内保护电位与保护电流测量 ,研究静止与流动海水中管内保护电位变化 ,保护电位与保护电流随时间变化以及管径与海水流速对管内保护电位的影响。冷却管 11个月平均保护电流密度约 0 .4m A/ m2 ,11个月后冷却管 (管内径 19m m,长 3m)管内远端保护电位为 - 940 m V(相对于 Ag/Ag Cl参比电极 )。实现冷却管 (管内径 19mm)内保护距离从以前的 0 .3m提高到 3m以上 (单端 )。经过近一年的模拟实验 ,冷却管完好如初 By applying the new electrochemical protection technique, the changes of the in-pipe protection potential and the protection current in still and flowing seawater, the change of the protection potential and the protection current with time, and the influence of the pipe diameter and the seawater flow rate on the in-pipe protection potential were studied by measuring the protection potential and the protection current in the cooling pipe. . The average protection current density of the cooling tube for 11 months was about 0.4 m A / m2. After 11 months, the cooling tube (tube diameter 19 m m, length 3 m) had a far-end protection potential of -940 mV (relative to Ag / Ag Cl parameter Than the electrode). To achieve the cooling pipe (tube diameter 19mm) within the protection from the previous increase of 0.3m to 3m (single-ended). After nearly a year of simulation experiments, the cooling pipe intact