泵喷推进型潜艇电场防护效果与阴极保护性能分析

为探究泵喷推进型潜艇在电场防护和外加电流阴极保护这两种典型工作形态下的防护效果,采用边界元法建立了此型潜艇的腐蚀相关静电场模型,仿真分析了导流罩和导叶对电场防护与阴极保护效能的影响。结果表明:相较于传统推进方式,泵喷推进型潜艇在海水中电场峰峰值降低了约38%,且其仅需约50%的电流值便能达到更优的电场防护效果。此外,不论阴极保护过程中整艇涂层是否完好,泵喷推进装置处的电场峰值均有一定程度的降低,这表明泵喷推进装置具有更好的电场隐身性能；然而在对泵喷推进型潜艇外加电流阴极保护的过程中,只能在船身和大轴处达到较好的保护效果,其导流罩内部的叶轮和导叶难以达到保护电位,处于欠保护状态,局部腐蚀防护仍需加强。

Analysis of electric field protection effect and cathodic protection performance of pump-jet propulsion submarine

In order to explore the protective effect of pump-jet propulsion submarine under the two typical working modes of electric field protection and impressed current cathodic protection, the boundary element method was used to establish the corrosion-related electrostatic field model of the submarine. The influence of fairing and guide vane on the electric field protection and cathodic protection performance was simulated and analyzed. The results show that compared with the traditional propulsion mode, the peak-to-peak value of electric field of pump-jet propulsion submarine in seawater is reduced by about 38%, and it can achieve better electric field protection effect with only about 50% current value. In addition, no matter whether the whole boat coating is intact or not in the cathodic protection process, the peak electric field at the pump-jet propulsion device is reduced to a certain extent, indicating that the pump-jet propulsion device has better electric field stealth performance. However, in the process of impressed current cathodic protection for pump-jet propulsion submarines, good protection effect can only be achieved at the hull and the major axis. The impeller and guide vane inside the fairing are difficult to reach the protection potential, which is in an under-protection state, so local corrosion protection still needs to be strengthened.