深浅交变环境牺牲阳极电化学性能研究  

Electrochemical Performance of Sacrificial Anodes in Alternating Depth and Shallowness of Seawater Environments

作　　者：张海兵[1] 张一晗 马力[1] 邢少华[1] 段体岗[1] 闫永贵[1] ZHANG Haibing;ZHANG Yihan;MA Li;XING Shaohua;DUAN Tigang;YAN Yonggui(State Key Laboratory for Marine Corrosion and Protection,Luoyang Ship Material Research Institute,Qingdao 266237,China)

机构地区：[1]中国船舶重工集团公司第七二五研究所海洋腐蚀与防护重点实验室,青岛266237

出　　处：《中国腐蚀与防护学报》2022年第5期867-872,共6页Journal of Chinese Society For Corrosion and Protection

摘　　要：在前期研究工作基础上,在Al-Zn-Ga-Si低电位牺牲阳极材料中分别添加Sn、Bi、Ti、Sb等合金元素改善阳极综合性能。通过常规海水环境中的电化学性能测试,在制备的多种阳极材料中遴选出符合要求的低驱动电位牺牲阳极材料。将遴选出的综合电化学性能良好的Al-Zn-Ga-Si-Sb阳极进行模拟深浅海交变环境电化学性能测试,考察Sb含量对阳极电化学性能影响;采用三维视频和宏观表征来分析Sb对溶解形貌的影响。实验结果表明,添加适量Sb可以促进阳极材料的均匀活化溶解,提高复杂环境下阳极活化性能,并减少局部腐蚀的作用,当Sb含量为0.5%(质量分数)时阳极综合电化学性能良好,满足高强钢阴极保护准则要求,可进一步开发Al-Zn-Ga-Si-0.5Sb牺牲阳极在深浅海交变环境下的高强钢阴极保护应用。Based on the previous research work,Sn,Bi,Ti,Sb and other alloying elements were added to the Al-Zn-Ga-Si low-potential sacrificial anode material to improve its overall performance of the anode.By conducting the electrochemical performance test in the conventional seawater environment,a sacrificial anode material with a low driving potential,that meets the requirements,is selected from a variety of prepared anode materials.The selected Al-Zn-Ga-Si-Sb anodes with good comprehensive electrochemical performance were further assessed in a simulated alternating depth and shallowness of seawater environment,especially in terms of its electrochemical performance,while the influence of Sb content on the electrochemical performance of the anode was also investigated through electrochemical performance test and three-dimensional video observation.The results show that the addition of an appropriate amount of Sb can promote the uniform activation and dissolution of the anode materials,therewith improve the activation performance of anodes in complex environments,and reduce the effect of local corrosion.When the Sb content is 0.5%(mass fraction),the comprehensive electrochemical performance of the anode is good and meets the requirements in accord with the general cathodic protection guidelines for high-strength steel.Thus,it may be expected that the Al-Zn-Ga-Si-0.5Sb sacrificial anodes can further be developed to meet the requirement for the high-strength steel cathodic protection in alternating depth and shallowness of seawater environments.

关 键 词：深浅交变 铝合金阳极 电化学 阴极保护 

分 类 号：TG172[金属学及工艺—金属表面处理]