A lap joint simulant laboratory test method of aluminium alloys

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TitreA lap joint simulant laboratory test method of aluminium alloys
Type de publicationJournal Article
Year of Publication2015
AuteursZimmer A., Oltra R., Le T.ML
JournalMATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
Volume66
Pagination1512-1518
Date PublishedDEC
Type of ArticleArticle
ISSN0947-5117
Résumé

A lap joint simulant cavity (LJSC) with a gap thickness of 200 mu m has been developed to test corrosion of assembled coated aluminium alloys. The LJSC was instrumented with electrodes allowing simultaneous pH and potential measurements in 0.5 M NaCl solution. Assuming the outer part of the LJSC is electrochemically inactive (painted sheet) it was confirmed that in free corroding conditions the pH inside the LJSC tends more towards alkalinisation. On the opposite, if the outer part of the LJSC is electrochemically active (unpainted sheet) the pH inside the LJSC tends towards an acidic value.

DOI10.1002/maco.201508320