The results presented in this work demonstrate the possibility of using reciprocal frequency (i/f) electrochemical noise for the detection of pitting corrosion and activation of pure aluminum in chloride media. Noise measurements were made in neutral and alkaline solutions with and without chloride ion additions to compare the noise response from general and pitting corrosion. The influence of indium and mercury ions present in chloride solution on the activation of aluminum was also considered. The spectral density plots obtained could characterize the type of attack and provide a means of detecting the presence of pitting corrosion.

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National Association of Corrosion Engineers
1987
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