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Electrochemical study of the pitting corrosion of aluminium and its alloys—III. The role of bonded water and the kinetics of formation and reformation of a passive layer

✍ Scribed by L. Tomcsányi; Zs. Nagy; J. Somlai; J. Borszéki

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
516 KB
Volume
38
Category
Article
ISSN
0013-4686

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✦ Synopsis

Abstrafl--Hydrogen evolution and aluminium electrodissolution processes were investigated by cu and wulometric methods on Al electrode at the cathodic end of the polarization curve. The proton or water is reduced at the passive layer with a diffusion controlled rate. The water wntent of the passive layer on Al was intestigated by a radiotracer technique using tritium labelled water. The water content of passive layers formed by different processes is diierent. By short-term sorption experiments an oxide layer reformation process was detected; a new (EPDP) model was proposed for the formation of the passive layer on aluminium and indicated by the variation of the pitting potential and the aluminium wntent of solution.

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