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Electrochemical study of the pitting corrosion of aluminium and its alloys—I. Determination of critical pitting and protection potentials

✍ Scribed by F. Øvari; L. Tomcsányi; T. Túrmezey

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
360 KB
Volume
33
Category
Article
ISSN
0013-4686

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✦ Synopsis

The effects of different experimental parameters influencing the determination of critical pitting and protection potentials of aluminium and its alloys are discussed. The simplest mechanical sample preparation, 0.05 mol dm -3 NaCl 1 moldm-3 Na,SO, test solution, C V polarization with 160.1 mV s-' sweep rate are the suitable experimental conditions. The standard deviation of the characteristic potentials are different; it is less than 5 mV at protection potential and less than 20 mV in the case of pitting potential. The effect of intermetallic phase composition is investigated in a certain range.

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