A study of the galvanic corrosion of titanium/L 316 stainless steel in artificial seawater using electrochemical noise (EN) measurements and electrochemical impedance spectroscopy (EIS)
A study of the galvanic corrosion of titanium/L 316 stainless steel in artificial seawater using electrochemical noise (EN) measurements and electrochemical impedance spectroscopy (EIS)
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DOI：
10.1108/00035591111167721
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发表时间：
2011-09
影响因子：
1.2
通讯作者：
R. Moshrefi;M. G. Mahjani;A. Ehsani;M. Jafarian
中科院分区：
文献类型：
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作者：
R. Moshrefi;M. G. Mahjani;A. Ehsani;M. Jafarian
目的：通过电化学噪声(EN)、交流阻抗谱(EIS)和阳极/阴极面积比对钛/L 316不锈钢电偶的电偶腐蚀行为的影响，研究钛/L 316不锈钢的电偶腐蚀行为。设计/方法/途径-采用电偶电偶的电偶腐蚀噪声测量方法，考察阴阳极面积比对L 316不锈钢/钛在人工海水中电偶腐蚀行为的影响。在开路条件下，采用三电极结构同时监测电流噪声和电位噪声。用去除直流分量后电势的标准差与电流噪声的标准差之比来评估抗噪声能力。通过快速傅立叶变换将时间序列噪声模式变换到频域，然后确定其在指定频率处的功率谱密度(PSD)，并将其与EIS和极化结果进行比较。
Purpose – This paper aims to investigate the galvanic corrosion of titanium/L 316 stainless steel, by electrochemical noise (EN), electrochemical impedance spectroscopy (EIS), and anode/cathode area ratio effect on the galvanic behavior of the couple.Design/methodology/approach – The EN measurement was employed to examine effects of anode to cathode area ratio on the galvanic corrosion behavior between stainless steel L 316 and titanium in artificial seawater. Current noise and potential noise were monitored simultaneously using a three‐electrode configuration under open‐circuit condition. The noise resistance was evaluated as the ratio of the standard deviation of the potential to that of the current noise after removing the DC component. The time‐series noise patterns were transformed into frequency domain by fast Fourier transformation and then their power spectrum densities (PSDs) at specified frequency were determined and compared with the EIS and polarization results.Findings – The EN, EIS and polar...