摘要
制作了用于海水腐蚀试验站全浸区暴露试片电化学检测的电极系统,采用极化电阻(Rp)和电化学阻抗谱(EIS)等测试技术,对舟山海水腐蚀试验站的4种碳钢和低合金钢全浸试片进行了现场电化学检测。测试结果反映了试片在海水中不同时期的腐蚀行为以及海水环境因素的影响。暴露期间,试片Rp值的变化主要是由于试片表面锈层的堆积和海水温度变化的结果,测试结果也表明了EIS技术能够用于试片海水腐蚀的现场检测,阻抗图谱反映了试片在海水中的腐蚀机制。一年周期电化学测试结果与失重法测得的腐蚀速率相近。
The electrode system for real-time electrochemical measurement of immersed samples were designed and applied at a marine corrosion test station in Zhoushan of China. It was proved that the electrode systems have good capabilities and can be used for electrochemical measurement for a long term. Polarization resistance mea- surement and electrochemical impedance spectroscopy （EIS） were used to monitor four carbon steels and low al- loy steels samples during the different period of exposure in seawater. The measuring results reflected the corro- sion performance of the samples in different period and the influence of seawater conditions. The change of cor- rosion potential indicates a changing corrosion status on the sample surface during the period of exposure in sea- water. The polarization resistance changed because the rust was deposited on the samples surface and the seawa- ter temperature changing. EIS proves to be qualified in measuring the metal samples exposed in seawater, which also reflects the corrosion mechanism of the samples during exposure. The electrochemical measuring results were approximately consistent with the lost weight data exposed in seawater for one year. The corrosion rate of the ul- tra-fine grained steel is higher than that of the homologous common steel.
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2007年第6期321-325,共5页
Journal of Chinese Society For Corrosion and Protection
基金
国家自然科学基金重大项目(50499335)
关键词
海水腐蚀
碳钢和低合金钢
电化学阻抗谱
电化学检测
marine corrosion, carbon steel, low alloy steel, electrochemical impedance spectroscopy（EIS）, electrochemical detection
