Al-Zn-In-Mg-Ti-Ga-Mn牺牲阳极在极地低温环境中的电化学性能  

Electrochemical performance of Al-Zn-In-Mg-Ti-Ga-Mn sacrificial anode in polar low temperature environment

作　　者：张一晗 张海兵 辛永磊 黄嵘 段体岗 马力 李祯 ZHANG Yi-han;ZHANG Hai-bing;XIN Yong-lei;HUANG Rong;DUAN Ti-gang;MA Li;LI Zhen(State Key Laboratory for Marine Corrosion and Protection,Luoyang Ship Material Research Institute(LSMRI),Qingdao 266237,China;Polar Research Institute of China,Shanghai 200136,China)

机构地区：[1]中国船舶集团有限公司第七二五研究所海洋腐蚀与防护重点实验室,青岛266237 [2]中国极地研究中心(中国极地研究所),上海200136

出　　处：《中国有色金属学报》2023年第4期1209-1219,共11页The Chinese Journal of Nonferrous Metals

摘　　要：基于前期牺牲阳极材料研究成果,对极地低温环境专用Al-Zn-In-Mg-Ti-Ga-Mn牺牲阳极开展模拟服役环境下的电化学性能测试,通过完整周期的“雪龙号”极地航行试验考察极端环境因素对牺牲阳极电化学性能的影响,采用高倍率扫描电镜等手段观测材料腐蚀产物特征和表面微观形貌。结果表明:在极端环境因素影响下,阳极材料的活化和溶解行为发生变化,海水环境中较高的溶解氧含量和盐度削弱了低温条件对离子运动的影响,阳极材料自腐蚀程度下降,阴极去极化反应得到遏制,阳极表面活化溶解速率和活性金属沉积速率得到提升,表面钝化膜的更新动态平衡得到有效维持,牺牲阳极在极地海洋环境中表现出良好的阴极保护性能。Based on the previous research results of sacrificial anode materials,the electrochemical performance test of Al-Zn-In-Mg-Ti-Ga-Mn sacrificial anode in polar low temperature environment was carried out under simulated service environment.The influence of extreme environmental factors on the electrochemical performance of sacrificial anodes was investigated through an entire cycle of polar sailing test on“Xuelong”scientific research vessel,and high-magnification scanning electron microscopy was used to observe the characteristics of corrosion products and surface micro-morphology of the material.The results show that the activation and dissolution behavior of anode materials changes under the influence of extreme environmental factors.The higher dissolved oxygen content and salinity in the seawater environment weakens the influence of low temperature conditions on ion movement,and the self-corrosion degree of anode materials is reduced.The cathodic depolarization reaction is curbed,meanwhile,the rates of the active dissolution on the anode surface and the deposition of active metals are increased.The renewal dynamic balance of the surface passivation film is effectively maintained,the sacrificial anodes show good cathodic protection performance in the polar marine environment.

关 键 词：极地环境 铝合金阳极 阴极保护 电化学性能 

分 类 号：TG174.41[金属学及工艺—金属表面处理]