Journal
SCIENTIFIC REPORTS
Volume 10, Issue 1, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-020-65396-0
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Funding
- European project FUNCOAT (Horizon2020-MSCA-RISE-2018) [823942]
- ACTICOAT project (Era.Net RUS Plus Call 2017) [477]
- European project MULTISURF (Horizon2020-MSCA-RISE-2014) [645676]
- Marie Curie Actions (MSCA) [645676, 823942] Funding Source: Marie Curie Actions (MSCA)
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The principal possibility to grow layered double hydroxide (LDH) at ambient pressure on plasma electrolytic oxidation (PEO) treated magnesium alloy AZ91 in the presence of chelating agents is demonstrated for the first time. It avoids hydrothermal autoclave conditions, which strongly limit wide industrial application of such coating systems, and the presence of carbonate ions in the electrolyte, which lead to the formation of passive non-functionalizable LDH. A combination of chelating agents (sodium diethylenetriamine-pentaacetate (DTPA) and salicylate) were introduced to the treatment solution. The role of each additive and the influence of treatment bath composition on the LDH formation processes are discussed. A synergistic effect of DTPA and salicylate during LDH formation is discovered and its possible explanation is proposed.
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