Electrochemical study of the pitting corrosion of aluminium and its alloys-II. Study of the interaction of chloride ions with a passive film on aluminium and initiation of pitting corrosion

L. Tomcsányi, K. Varga, I. Bartik, H. Horányi, E. Maleczki

Research output: Contribution to journalArticle

121 Citations (Scopus)

Abstract

The composition of the passive layer on aluminium and reformation of this layer during cathodic polarization were investigated by radiotracer and electrochemical methods in the presence of sulphate and chloride ions. Chloride ion is not ab- or adsorbed on the passive layer but, attacks this layer as a chemical reaction partner. Therefore, the pitting corrosion of aluminium and its alloys is a combined electrochemical and chemical process. The cathodic reformation of passive layer is indicated by the changing of the concentration of bonded chloride ion, the changing of hydrogen overvoltage as well as the shift of Eπ potential.

Original languageEnglish
Pages (from-to)855-859
Number of pages5
JournalElectrochimica Acta
Volume34
Issue number6
DOIs
Publication statusPublished - 1989

Fingerprint

Pitting
Aluminum
Chlorides
Aluminum alloys
Ions
Corrosion
Cathodic polarization
Sulfates
Protons
Chemical reactions
Hydrogen
Chemical analysis

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

Electrochemical study of the pitting corrosion of aluminium and its alloys-II. Study of the interaction of chloride ions with a passive film on aluminium and initiation of pitting corrosion. / Tomcsányi, L.; Varga, K.; Bartik, I.; Horányi, H.; Maleczki, E.

In: Electrochimica Acta, Vol. 34, No. 6, 1989, p. 855-859.

Research output: Contribution to journalArticle

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