船舶外加电流阴极保护系统设计

Design of Impressed Current Cathodic Protection System

海航船舶受到海水冲刷侵蚀。海水作为一种很强的腐蚀性介质,对船舶钢质外板有很强的腐蚀性。对于长期处于海水中的船体而言,腐蚀问题更显突出。本文首先对船舶的腐蚀机理进行分析;然后,对传统腐蚀防护方法进行研究。重点对液化气体船舶,对外加电流阴极保护装置的安全性、可靠性进行分析研究。最后,对船体阴极外加电流保护系统进行相关计算,为该类型船舶在船体设计中采用阴极保护装置提供参考。

Ships sailing across seas are eroded by the sea water for a long time,which makes the ship hull corroded Over time,the corrosion problem of ship hull is becoming more prominent.In this paper,the basic mechanism of ship hull corrosion is analyzed.Then,the traditional corrosion protection methods are studied.At the same time,the safety and reliability of external current cathodic protection device for liquefied gas ships are analyzed.And then,the calculations in the design of the cathodic protection system are stated in detail,which could provide a reference for design of the cathodic protection device of similar ships.