The Significance of Correlation Dimension Obtained from Electrochemical Noise
The Significance of Correlation Dimension Obtained from Electrochemical Noise
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DOI：
10.5796/electrochemistry.80.907
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发表时间：
2012-11
期刊：
影响因子：
2.5
通讯作者：
Da-Hai Xia;Jiangbo Shi;Wenqi Gong;R. Zhou;Zhiming Gao;Jihui Wang
中科院分区：
文献类型：
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作者：
Da-Hai Xia;Jiangbo Shi;Wenqi Gong;R. Zhou;Zhiming Gao;Jihui Wang
采用电化学噪声技术研究了Q235碳钢和核级304不锈钢在不同溶液中的腐蚀类型。利用相空间重构理论对EN数据进行了分析。利用相空间重构得到的关联维数，定量评价了EN的混沌行为。结果表明，局部腐蚀具有较高的关联维数，而钝化具有较低的关联维数。我们提出，从钝化到局部腐蚀的信号的复杂性和不确定性的相关维数增加，这是相关维数的物理意义的EN。
The corrosion types of Q235 carbon steel and nuclear grade 304 stainless steel (304 NG SS) in different solutions are investigated by electrochemical noise (EN) technique. EN data are analyzed by using phase space reconstruction theory. With the obtained correlation dimension from the phase space reconstruction, the chaotic behavior of EN is quantitatively evaluated. It is concluded that local corrosion shows a higher correlation dimension while passivation shows a lower correlation dimension. We propose that the correlation dimension increases with the complexity and uncertainty of the signals from passivation to local corrosion, which is the physical meaning of correlation dimension for EN.