高性能牺牲阳极研发与性能检测分析

Development and Performance Testing Analysis of High Performance Sacrificial Anodes

铝合金牺牲阳极作为海工领域常用的阴极保护关键材料,其质量和性能关乎受保护结构物的安全和使用寿命。首先以常见的Al-Zn(5.5%)-In(0.019%)-Si(0.09%)为阳极配方,进行了不同浇铸工艺(模具温度为常温至500℃)的阳极试制,优选出合适的模具温度;随后采用该模具温度对不同配方设计的牺牲阳极进行浇铸和电化学性能测试、化学成分分析和金相分析;此外,采用了不同电流密度的电化学性能测试对牺牲阳极的长期使用性能予以测试。结果表明在阳极配方为Al-Zn(4.3%)-In(0.022%)-Si(0.08%)、模具温度为350℃时可获得常温使用条件下的高性能铝合金牺牲阳极。

Aluminum alloy sacrificial anode,as a commonly used cathodic protection key material in the marine industry,its quality and performance are related to the safety and service life of protected structures.This article first uses the common Al Zn(5.5%)-In(0.019%)-Si(0.09%)as the anode formula,and conducts anode trial production with different casting processes(mold temperature from room temperature to 500℃)to select the appropriate mold temperature;Then,the temperature of the mold was used for casting and electrochemical performance testing,chemical composition analysis,and metallographic analysis of sacrificial anodes with different formulation designs;In addition,this article also used electrochemical performance tests with different current densities to test the long-term performance of sacrificial anodes.The results show that high-performance aluminum alloy sacrificial anodes can be obtained under normal temperature conditions when the anode formula is Al-Zn(4.3%)-In(0.022%)-Si(0.08%),and the mold temperature is 350℃.