DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, WJ | ko |
dc.contributor.author | Pyun, Su Il | ko |
dc.date.accessioned | 2013-02-27T16:42:54Z | - |
dc.date.available | 2013-02-27T16:42:54Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2000 | - |
dc.identifier.citation | ELECTROCHIMICA ACTA, v.45, no.12, pp.1901 - 1910 | - |
dc.identifier.issn | 0013-4686 | - |
dc.identifier.uri | http://hdl.handle.net/10203/69655 | - |
dc.description.abstract | Effects of sulphate (SO42-) ion additives on the pitting corrosion of pure aluminium (Al) have been investigated in aqueous 0.01 M NaCl solution as a function of SO42- ion concentration using potentiodynamic polarisation experiment, ac impedance spectroscopy, electrochemical quartz crystal microbalance technique and abrading electrode technique. The addition of SO42- ions to NaCl solution raised the pitting potential (E-pit) of pure Al in value and simultaneously the anodic current density at potentials much higher than the E-pit on the polarisation curves. This implies that SO42- ions impede the initiation of pit on pure Al surface below the E-pit, but enhance the growth of pre-existing pits, which is validated by optical microscopy, It was found that the values of the Cl- ion-incorporated outer film resistance R-out,R-ox in SO42- ion-containing chloride solutions were much lower than those in SO42- ion-free solution, obtained from the impedance spectra measured at potentials below the E-pit. The chloride peak disappeared from the Auger spectra in SO42- ion-containing solutions. The mass decay rate and pit growth rate b were observed to increase in values once the pits were formed in SO42- ion-containing chloride solutions. Based upon the above experimental results, it is suggested that SO42- ions retard the oxide film breakdown by Cl- ion incorporation into the film, while they accelerate the Al metal dissolution through the instantaneous formation of tunnels at the bottom of the pre-existing pits after the exposure of bare surface above the E-pit. (C) 2000 Elsevier Science Ltd. All rights reserved. | - |
dc.language | English | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.subject | PIT INITIATION | - |
dc.subject | AC-IMPEDANCE | - |
dc.subject | INHIBITION | - |
dc.subject | COPPER | - |
dc.subject | KINETICS | - |
dc.subject | SULFATE | - |
dc.subject | OXIDE | - |
dc.subject | FILMS | - |
dc.title | Effects of sulphate ion additives on the pitting corrosion of pure aluminium in 0.01 M NaCl solution | - |
dc.type | Article | - |
dc.identifier.wosid | 000085608100005 | - |
dc.type.rims | ART | - |
dc.citation.volume | 45 | - |
dc.citation.issue | 12 | - |
dc.citation.beginningpage | 1901 | - |
dc.citation.endingpage | 1910 | - |
dc.citation.publicationname | ELECTROCHIMICA ACTA | - |
dc.identifier.doi | 10.1016/S0013-4686(99)00418-1 | - |
dc.contributor.nonIdAuthor | Lee, WJ | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | aluminium | - |
dc.subject.keywordAuthor | sulphate ion | - |
dc.subject.keywordAuthor | Cl- ion incorporation | - |
dc.subject.keywordAuthor | Ac impedance spectroscopy | - |
dc.subject.keywordAuthor | electrochemical quartz crystal microbalance | - |
dc.subject.keywordPlus | PIT INITIATION | - |
dc.subject.keywordPlus | AC-IMPEDANCE | - |
dc.subject.keywordPlus | INHIBITION | - |
dc.subject.keywordPlus | COPPER | - |
dc.subject.keywordPlus | KINETICS | - |
dc.subject.keywordPlus | SULFATE | - |
dc.subject.keywordPlus | OXIDE | - |
dc.subject.keywordPlus | FILMS | - |
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