Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/67409
Title: Effect of alternating voltage on the pitting of aluminum in nitrate, sulfate, and chloride solutions
Authors: Tan, T.C. 
Chin, D.-T.
Issue Date: Dec-1989
Source: Tan, T.C.,Chin, D.-T. (1989-12). Effect of alternating voltage on the pitting of aluminum in nitrate, sulfate, and chloride solutions. Corrosion 45 (12) : 984-989. ScholarBank@NUS Repository.
Abstract: A study has been made of the effect of 60-Hz sinusoidal, square, and triangular alternating voltages (AV) on the corrosion of aluminum in dilute nitric acid, sodium nitrate, sodium sulfate, and sodium chloride solutions. The anodic polarization curves and the pitting behavior of aluminum were examined with an AV modulation technique over a range of AV magnitudes from 0 to 2000 mV rms. The results revealed that AV reduced the passive potential regime of aluminum by shifting the passive-transpassive transition potential toward the negative direction and the active-passive transition potential toward the positive direction. AV destroyed the passivity of aluminum in the nitrate solutions and caused the pitting corrosion to occur at more negative DC potentials. Additional study results are discussed.
Source Title: Corrosion
URI: http://scholarbank.nus.edu.sg/handle/10635/67409
ISSN: 00109312
Appears in Collections:Staff Publications

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