| 王蔚港,程新,廖慧敏,窦雯雯,陈士强,刘光洲,唐彪,逯彦伟.Al-Zn-In系牺牲阳极在间浸环境中的性能研究[J].装备环境工程,2022,19(8):66-74. WANG Wei-gang,CHENG Xin,LIAO Hui-min,DOU Wen-wen,CHEN Shi-qiang,LIU Guang-zhou,TANG Biao,LU Yan-wei.Performance of Al-Zn-In Alloys Sacrificial Anodes under Cyclic Immersion Condition[J].Equipment Environmental Engineering,2022,19(8):66-74. |
| Al-Zn-In系牺牲阳极在间浸环境中的性能研究 |
| Performance of Al-Zn-In Alloys Sacrificial Anodes under Cyclic Immersion Condition |
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| DOI：10.7643/issn.1672-9242.2022.08.010 |
| 中文关键词: 铝合金 牺牲阳极 电化学性能 间浸环境 干湿交替 海洋腐蚀中图分类号:TG174 文献标识码:A 文章编号:1672-9242(2022)08-0066-09 |
| 英文关键词:aluminum alloy sacrificial anode electrochemical performance cyclic immersion wet-dry cycle marine corrosion |
| 基金项目:国家自然科学基金(41906039)；山东省重点研发计划(2019JZZY010333)；山东大学青年学者未来计划(62420089964183) |
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| Author | Institution |
| WANG Wei-gang | Institute of Marine Science and Technology, Shandong University, Shandong Qingdao 266237, China |
| CHENG Xin | Institute of Marine Science and Technology, Shandong University, Shandong Qingdao 266237, China |
| LIAO Hui-min | Institute of Marine Science and Technology, Shandong University, Shandong Qingdao 266237, China |
| DOU Wen-wen | Institute of Marine Science and Technology, Shandong University, Shandong Qingdao 266237, China |
| CHEN Shi-qiang | Institute of Marine Science and Technology, Shandong University, Shandong Qingdao 266237, China |
| LIU Guang-zhou | Institute of Marine Science and Technology, Shandong University, Shandong Qingdao 266237, China |
| TANG Biao | Shandong Derui Anti-Corrosion Materials Co., Ltd., Shandong Zibo 256100, China |
| LU Yan-wei | Shandong Derui Anti-Corrosion Materials Co., Ltd., Shandong Zibo 256100, China |
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| 中文摘要: |
| 目的 探究4种常用Al-Zn-In系牺牲阳极(Al-Zn-In、Al-Zn-In-Cd、Al-Zn-In-Mg-Ti、Al-Zn-In-Mg-Ga-Mn)在海水间浸环境中的电化学性能。方法 采用恒电流法对4种阳极的开路电位、工作电位、实际电容量、电流效率及溶解形貌等进行研究，并结合电化学阻抗谱、动电位极化曲线等方法进行分析。结果 在间浸环境中，Al-Zn-In、Al-Zn-In-Mg-Ti、Al-Zn-In-Mg-Ga-Mn的电流效率均在88.92%以上，3种阳极的工作电位在‒0.96 ~ ‒1.10 V波动，能满足碳钢在间浸环境中的保护需要。Al-Zn-In-Mg-Ga-Mn阳极溶解形貌均匀，Al-Zn-In和Al-Zn-In-Mg-Ti阳极溶解形貌略差。Al-Zn-In-Cd阳极电流效率仅为80.95%，工作电位在‒0.93~‒1.10 V波动，溶解形貌不均匀，电化学性能最差。研究发现，Al-Zn-In-Cd阳极表面附着的腐蚀产物多次在空气环境中脱水，并形成壳层，导致电位正移，阻碍阳极的进一步活化。结论 在间浸环境中，4种阳极的电化学性能由好到差依次为Al-Zn-In-Mg-Ga-Mn阳极、Al-Zn-In阳极、Al-Zn-In-Mg-Ti阳极、Al-Zn-In-Cd阳极，前3种阳极适用于间浸环境中海洋结构物的阴极保护。 |
| 英文摘要: |
| This research aims to explore the electrochemical performance of four commonly used Al-Zn-In alloys sacrificial anodes (Al-Zn-In, Al-Zn-In-Cd, Al-Zn-In-Mg-Ti, Al-Zn-In-Mg-Ga-Mn) under seawater cyclic immersion condition, such parameters as the open circuit potential, closed circuit potential, actual capacity, current efficiency and dissolution morphology of four anodes were studied by constant current method and the electrochemical performance further analyzed with electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization curves. Furthremore, the current efficiency of Al-Zn-In, Al-Zn-In-Mg-Ti, Al-Zn-In-Mg-Ga-Mnanodes was higher than 88.92%, and the closed circuit potential ranged from−0.96 V to−1.10 V, which could meet the needs of protection of carbon steel in cyclic immersion condition. In addition, the anodic dissolution morphology of Al-Zn-In-Mg-Ga-Mn was even, while the morphology of Al-Zn-In and Al-Zn-In-Mg-Ti was slightly worse. The current efficiency of Al-Zn-In-Cd anode was only 80.95%, and the closed circuit potential ranged from −0.93 V to −1.10 V. Moreover, the dissolution morphology was uneven, and the electrochemical performance was worst in this study. This can be demonstrated that the corrosion products attached to the anode surface are repeatedly dehydrated in atmosphere, thereby forming shell, which leads to the positive shift of potential, and thus hinders the further activation of the anode. The results show that electrochemical performance of four anodes under cyclic immersion condition may be ranked as the following order:Al-Zn-In-Mg-Ga-Mn>Al-Zn-In>Al-Zn-In-Mg-Ti>Al-Zn-In-Cd, and the first three anodes are suitable for cathodic protection of marine structures in cyclic immersion condition. |
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