Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7896042 | Corrosion Science | 2014 | 10 Pages |
Abstract
A comprehensive study of the corrosion properties of low alloy steel protected by 40-50Â nm aluminium and tantalum mixed oxide coatings grown by atomic layer deposition is reported. Electrochemical and surface analysis was performed to address the effect of substrate surface finish and whether an oxide mixture or nanolaminate was used. There was no dissolution or breakdown for nanolaminate alumina/tantala stacks in acidic NaCl solution. Localised corrosion (pitting) took place when defects exposing the substrate pre-existed in the coating. Substrate pre-treatment by brushing and H2-Ar plasma was instrumental to block or slow down pit initiation by reducing the defect dimensions.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Belén DÃaz, Emma Härkönen, Jolanta Åwiatowska, Antoine Seyeux, Vincent Maurice, Mikko Ritala, Philippe Marcus,