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首页> 外文期刊>Acta metallurgica Sinica >ELECTROCHEMICAL NOISE ANALYSIS OF PURE ALUMINUM IN SODIUM CHLORIDE SOLUTION WITH WAVELET TRANSFORM TECHNIQUE
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ELECTROCHEMICAL NOISE ANALYSIS OF PURE ALUMINUM IN SODIUM CHLORIDE SOLUTION WITH WAVELET TRANSFORM TECHNIQUE

机译:小波变换技术分析氯化钠溶液中纯铝的电化学噪声。

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摘要

Wavelet transforms (WT) are proposed as an alternative tool to overcome the limitations of Fourier transforms (FFT) in the analysis of electrochemical noise (EN) data. The most relevant feature of this method of analysis is its capability of decomposing electrochemical noise records into different sets of wavelet coefficients, which contain information about the time scale characteristic of the associated corrosion event. In this context, the potential noise fluctuations during the free corrosion of pure aluminum in sodium chloride solution was recorded and analyzed with wavelet transform technique. The typical results showed that the EN signal is composed of distinct type of events, which can be classified according to their scales, i.e. their time constants. Meanwhile, the energy distribution plot (EDP) can be used as "fingerprints" of EN signals and can be very useful for analyzing EN data in the future.
机译:小波变换(WT)作为一种替代工具被提出,可以克服傅立叶变换(FFT)在电化学噪声(EN)数据分析中的局限性。这种分析方法最相关的特征是它能够将电化学噪声记录分解为不同的小波系数集,其中包含有关腐蚀事件的时标特性的信息。在这种情况下,记录和使用小波变换技术分析纯铝在氯化钠溶液中自由腐蚀期间的潜在噪声波动。典型结果表明,EN信号由不同类型的事件组成,可以根据事件的规模(即时间常数)进行分类。同时,能量分布图(EDP)可以用作EN信号的“指纹”,并且对于将来分析EN数据非常有用。

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