摘要
采用电化学阻抗谱、开路电位测试和阴极极化曲线,结合扫描电镜成像分析,研究了模拟大气环境不同液膜厚度和交流电场对A6082-T6铝合金腐蚀行为的影响。结果表明:降低液膜厚度加速了铝合金A6082-T6的腐蚀,交流电场显著改变了铝合金局部腐蚀形态,从大量点蚀转变成出现严重的剥蚀。
The effect of alternating electric field on the corrosion behavior of A6082-T6 Al-alloy in an artificial atmospheric environment,namely,an electrolyte film on the surface of Al-alloy is studied by means of electrochemical impedance spectroscopy,open circuit potential and cathodic polarization curve measurements,as well as scanning electron microscopy.The results show that,with the decreasing of thickness of electrolyte film,the corrosion rate of A6082-T6 Al-alloy was accelerated.Meanwhile,the applied AC electric field could clearly alter the morphology of localized corrosion type of A6082-T6 Al-alloy,namely transformed from pitting corrosion with a large number of pits to serious exfoliation corrosion.
作者
胡露露
赵旭阳
刘盼
吴芳芳
张鉴清
冷文华
曹发和
HU Lulu;ZHAO Xuyang;LIU Pan;WU Fangfang;ZHANG Jianqing;LENG Wenhua;CAO Fahe(Department of Chemistry,Zhejiang University,Hangzhou 310027,China;Key Laboratory for Protection Technology of High-Rise Operation,Zhejiang Huadian Equipment Testing Institute Co.Ltd.,Hangzhou 310015,China;School of Materials,Sun Yat-sen University,Guangzhou 510006,China)
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2020年第4期342-350,共9页
Journal of Chinese Society For Corrosion and Protection
基金
国家自然科学基金(51771174)
国家材料腐蚀与防护科学数据中心资助。
关键词
交流电场
液膜厚度
铝合金
腐蚀行为
电化学阻抗谱
微观形貌
alternating electric field
thickness of electrolyte layer
aluminum alloy
corrosion behavior
EIS
microscopic morphology
