四种接地材料在土壤中的氧浓差宏电池腐蚀行为  

Macrocell corrosion behaviors of four grounding materials induced by oxygen concentration difference in soil

作　　者：周梦鑫 王震宇 ZHOU Mengxin;WANG Zhenyu(Institute of Corrosion Science and Technology,Guangzhou 510530,China)

机构地区：[1]广东腐蚀科学与技术创新研究院,广东广州510530

出　　处：《电镀与涂饰》2025年第3期24-33,共10页Electroplating & Finishing

摘　　要：[目的]研究4种接地材料在模拟土壤氧浓差宏电池环境下的腐蚀行为。[方法]根据宏观形貌、微观形貌、电位差、锈层成分、宏电池电流密度、腐蚀速率、电化学阻抗谱等测试与表征结果,对比研究了不同接地材料在汕头土壤氧浓差宏电池环境下的腐蚀行为。[结果]导电高分子基复合接地材料在砂土与黏土中的腐蚀速率分别为0.13 mm/a与0.053 mm/a,大约是20钢的1/30、镀锌钢的1/28和紫铜的1/20。导电高分子基复合接地材料的宏电池电位差和电流密度最小,宏电池腐蚀效应最弱。[结论]在土壤氧浓差宏电池腐蚀环境下,导电高分子基复合接地材料的耐腐蚀性能最强。[Objective]The corrosion behavior of four grounding materials in a simulated soil oxygen concentration macrocell environment was studied.[Method]Through macroscopic and microscopic morphology observation,rust layer composition analysis,macrocell potential difference and current density measurement,corrosion rate calculation,and electrochemical impedance spectroscopy(EIS)characterization,the corrosion behaviors of different grounding materials in soil in Shantou area were evaluated and compared.[Result]The corrosion rate of conductive polymer-based composite grounding material was 0.13 mm/a in sandy soil and 0.053 mm/a in clay,which was approximately 1/30 of that of 20 steel,1/28 of that of galvanized steel,and 1/20 of that of red copper.The conductive polymer-based composite material exhibited the lowest macrocell potential difference and current density,indicating the weakest macrocell corrosion effect.[Conclusion]Under oxygen concentration macrocell corrosion conditions in soil,the conductive polymer-based composite grounding material has the superior corrosion resistance as compared with conventional metallic materials.

关 键 词：导电高分子基复合接地材料 碳钢 镀锌钢 紫铜 土壤 氧浓差宏电池 腐蚀 

分 类 号：TG172.4[金属学及工艺—金属表面处理]