回填石包覆下Al-Zn-In-Si-Ti-Sn牺牲阳极在淡海水中的电化学行为
Electrochemical Behavior of Al-Zn-In-Si-Ti-Sn Sacrificial Anode Covered with Backfill Stone in Diluted Seawater
刘朝信 1于林 1王辉 1王廷勇1
作者信息
- 1. 青岛双瑞海洋环境工程股份有限公司, 青岛 266101
- 折叠
摘要
采用电化学测试及电偶腐蚀试验等研究了回填石包覆下Al-Zn-In-Si-Ti-Sn牺牲阳极在淡海水中的电化学行为.结果表明:Al-Zn-In-Si-Ti-Sn 牺牲阳极在回填石包覆环境中的电荷转移电阻(Rct)及电感电阻(RL)均高于在淡海水环境中的,且其在回填石包覆环境中的腐蚀电流密度(Jcorr)显著低于在淡海水环境的.回填石包覆下,阳极电偶电流大幅降低,混合电位显著正移,阳极溶解不均匀.回填石会阻碍Cl-和溶解氧的扩散,回填石包覆会导致Al-Zn-In-Si-Ti-Sn牺牲阳极的溶解速率显著下降,溶解不均匀,最终导致阳极性能下降.
Abstract
The electrochemical behavior of an Al-Zn-In-Si-Ti-Sn sacrificial anode coated with backfill stone in dilute seawater was studied using electrochemical testing and galvanic corrosion testing.The results show that the charge transfer resistance(Rct)and inductance resistance(RL)of the Al-Zn-In-Si-Ti-Sn sacrificial anode in backfill stone coating environment were higher than those in the brackish water environment,and its corrosion current density(Jcorr)in the backfill stone coating environment was significantly lower than that in the brackish water environment.Under the coverage of backfill stone,the anodic current significantly decreased,the mixing potential significantly shifted forward,and the anodic dissolution was uneven.Backfilling stone would hinder the diffusion of Cl-and dissolved oxygen,and the covering with backfilling stone would significantly reduce the dissolution rate of the Al-Zn-In-Si-Ti-Sn sacrificial anode,resulting in uneven dissolution and ultimately a decrease in anode performance.
关键词
牺牲阳极/阴极保护/电阻率/回填石Key words
sacrificial anode/cathodic protection/resistivity/backfill stone引用本文复制引用
基金项目
广东省重点领域研发计划(2019 B111105002)
出版年
2024
NETL
NSTL
万方数据