摘要
通过人工合成铁铝氧化物,并采用电化学阻抗谱(EIS)、极化曲线、扫描电镜(SEM)、能谱分析(EDS)和X射线衍射(XRD)等技术,考察了接地极铜材料在添加不同浓度铁铝氧化物的饱和红壤溶液中的腐蚀行为。结果表明,铁铝氧化物对铜腐蚀具有先促进后抑制作用。在添加不同浓度铁铝氧化物的红壤条件下Cu的阻抗随着浸泡时间的延长先升高后降低并趋于平稳。Cu的腐蚀速率随添加的铁铝氧化物含量的增大出现先增大后减小的趋势。Cu的腐蚀主要以全面腐蚀为主,腐蚀产物膜主要由Cu2O组成。
As test materials acidic red soil i.e. ferrallitic soil was taken from Yichun area of Jiangxi province and an Fe-Al double oxide was synthesized in laboratory. The corrosion behavior of copper for grounding grids in saturated solutions of mixtures of red soil with different amount of the Fe-Al double oxide was studied by EIS, polarization curve measurement, SEM, EDS and XRD. The results show that the Fe-Al double oxide can promote and then inhibit the copper corrosion process in the red soil. The corrosion impedance of copper increases and then tends to be stable in the saturated solutions of mixtures of red soil with different amount of the Fe-Al double oxide. The corrosion rates of copper increase and then decrease with the increase amount of the Fe-Al double oxide. Corrosion of copper is mainly uniform corrosion, accompanied by microbial corrosion phenomena, corrosion products formed are consisted mainly of Cu2O.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2015年第5期463-467,共5页
Corrosion Science and Protection Technology
基金
上海市科委项目(14DZ2261000)
国家电网公司科技项目(5226SX13044J)资助
关键词
CU
铁铝氧化物
红壤
土壤腐蚀
copper, Fe-Al double oxide, red soil, soil corrosion
