摘要
采用浸泡实验、电化学阻抗谱测试、扫描电镜等分析方法,研究了碳添加型导电涂层接地材料在陕北土壤模拟溶液中的腐蚀行为。结果表明,涂层内部碳网之间的间隙会成为腐蚀介质和氧的扩散通道;随着浸泡时间的延长,涂层的阻抗明显降低;涂层吸水达到饱和,碳和基体的电偶效应会加速基体的腐蚀,腐蚀产物主要是基体Zn的氧化物。
The corrosion behavior of a carbon filled conducting organic coating for grounding Zn was investigated in a simulated solution of the soil of Shanbei area by means of EIS, SEM and open circuit potential measurement. The results showed that in the simulation solution, water and oxygen can migrate through the porous or defects in carbons net. The EIS data showed that the re- sistance of the coating decreased with the increasing immersion time. When water and oxygen reach the substrate surface, corrosion of Zn was enhanced as the anode part of the Zn/C galvanic corrosion system. The corrosion product was mainly composed of oxide of zinc.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2013年第6期489-494,共6页
Corrosion Science and Protection Technology
基金
国家电网公司2009年度科技项目资助
关键词
碳添加型导电涂层
接地材料
陕北土壤
腐蚀
carbon filled conducting coating, ground material, Shanbei soil, corrosion
