小波噪声电阻与EIS结合评价涂覆层性能  

EVALUATION OF COATINGS BY THE COMBINED USE OF EIS AND WAVELET ELECTROCHEMICAL NOISE RESISTANCE

作　　者：高志明[1] 宋诗哲[1] 

机构地区：[1]天津大学材料科学与工程学院,天津300072

出　　处：《中国腐蚀与防护学报》2008年第4期193-196,共4页Journal of Chinese Society For Corrosion and Protection

基　　金：国家重点基础研究发展规划项目(2006CB605004);国家自然科学基金重大项目(50499335)

摘　　要：用电化学阻抗谱和电化学噪声方法研究常用碳钢基底高绝缘性能防护层。在中高频范围测试涂层体系的电化学阻抗谱,在低频范围测试电化学噪声。用电化学阻抗谱中高频信息得到评价参数等效电容。用小波多分辨分析分频特征,建立了小波噪声电阻方法,可以得到较低频率下的噪声电阻信息。得到的评价涂敷层性能的等效电容和小波噪声电阻有很好的对应性。The highly insulated coating on the traditional carbon steel substrate was evaluated by electrochemical impedance spectroscopy （EIS） method and electrochemical noise （EN） technology. Wavelet electrochemical noise resistance （WENR） was introduced in this paper. To evaluate the coatings, EIS measurement was used at middle and high frequency and EN technology was used at low frequency. Coating capacitance （Cc） was extracted from EIS data as the evaluating parameter.WENR at low frequency was obtained as the other evaluating parameter. The two coating evaluating parameters, WENR and Cc, are verified to be in good accordance with each other.

关 键 词：小波分析 电化学噪声 电化学阻抗谱 防护层 

分 类 号：TG174[金属学及工艺—金属表面处理]