摘要
采用周期浸泡的腐蚀试验方法,并通过电化学阻抗谱(EIS)、扫描电子显微镜(SEM)等检测技术,研究了7A04铝合金的腐蚀行为和腐蚀机理。结果表明,7A04铝合金的腐蚀动力学符合幂函数规律,其腐蚀历程为由点蚀经短暂的晶间腐蚀后快速发展为剥蚀,EIS由高中频3个容抗弧和低频收缩的感抗弧组成。
The corrosion mechanism and behavior of 7A04 aluminum alloys was studied by alternate immersion corrosion test,associated with EIS,SEM examination.The results showed that the corrosion kinetics of 7A04 obey exponential law;the corrosion of 7A04 starts from pitting,and develops to exfoliation corrosion rapidly;EIS of 7A04 consists of three high-intermediate frequency capacitive curves and a low frequency shrinking inductive curve.
出处
《装备环境工程》
CAS
2011年第1期53-56,69,共5页
Equipment Environmental Engineering
基金
国防科技工业技术基础科研项目(H052006A004)
关键词
7A04铝合金
腐蚀机理
周期浸润试验
电化学交流阻抗谱
7A04 aluminum alloy
corrosion mechanism
alternate immersion corrosion test
electrochemical impedance spectroscopy
