导管架复合牺牲阳极系统和铝基牺牲阳极系统的对比分析  

A Contrast Between Compound Sacrificial Anode System and Aluminum Based Anode System

作　　者：张国华[1] 李妍[1] 

机构地区：[1]海洋石油工程股份有限公司设计公司,天津300451

出　　处：《中国造船》2007年第B11期36-42,共7页Shipbuilding of China

摘　　要：复合式牺牲阳极是针对浸入海水结构，如海洋平台的导管架进行阴极保护的新品。这种阳极由两种不同的阳极材料组成（内部是铝合金，外部是镁合金），它可以实现阳极材料重量和花费的显著降低，这种降低是由于形成于结构表面的高性能的钙沉积层造成的。和传统铝基牺牲阳极对比，这种阳极不仅能带来阳极重量和花费的降低，它还可以提供高的保护特性。外层的镁阳极提供高的驱动电压满足阴极初期极化，而内层铝阳极提供高的电化学效率以达到延长使用寿命的目的。这种优异的对比结果说明在持续观察的情况下，这种系统可以应用于浸入海水结构的阴极保护。A new type of sacrificial anode for cathodic protection （CP） of structures immersed in seawater, such as the steel jackets of offshore platforms, is developed in this paper. The anode consists of two diverse anodic materials （aluminum alloy on the inside and magnesium in the surface layers） and offers significant reductions in weight and cost of the anodic material. These reductions result from the effect of a highly protective calcareous deposit that forms on the structures. This type of anode not only gives highly reductions in weight and cost, but also gives a highly protective property. The outside magnesium anode offers highly driving voltage to meet initial cathode polarization and the inside aluminum anode offers highly electrochemical capacity to prolong service life. Such positive contrast results enable this system to be currently adopted on immersed structures under continuous observation.

关 键 词：复合牺牲阳极系统 海洋平台 成本 阳极保护 

分 类 号：U663.85[交通运输工程—船舶及航道工程]