The corrosion potential fluctuations of aluminium alloy AA 6351 electrodes in 0.5 M chloride solutions were recorded both in the absence and in the presence of the following inhibitors: 2-mercapto-pyrimidine, sodium molybdate and sodium nitrate. The corresponding spectral density plots, calculated over a wide frequency range, are discussed in order to evaluate the possibility of finding the mechanism of action of the additives, by analyzing the electrochemical noise. As a reference, the polarization curve of the alloy in the various solutions are reported.
Evaluation of corrosion inhibitors by electrochemical noise analysis
MONTICELLI, Cecilia;BRUNORO, Giancarlo;FRIGNANI, Alessandro;TRABANELLI, Giordano
1992
Abstract
The corrosion potential fluctuations of aluminium alloy AA 6351 electrodes in 0.5 M chloride solutions were recorded both in the absence and in the presence of the following inhibitors: 2-mercapto-pyrimidine, sodium molybdate and sodium nitrate. The corresponding spectral density plots, calculated over a wide frequency range, are discussed in order to evaluate the possibility of finding the mechanism of action of the additives, by analyzing the electrochemical noise. As a reference, the polarization curve of the alloy in the various solutions are reported.File in questo prodotto:
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