Journal
PLASMA PROCESSES AND POLYMERS
Volume 13, Issue 2, Pages 266-278Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppap.201500059
Keywords
corrosion; electrochemical measurements; plasma electrolytic oxidation; plasma-enhanced chemical vapour deposition; post-treatment
Funding
- UK EPSRC [EP/H051317/1, EP/L017563/1]
- ECR Advanced Grant [320879 'IMPUNEP']
- [COST-STSM-MP0804-13138]
- Engineering and Physical Sciences Research Council [EP/H051317/1, EP/L017563/1] Funding Source: researchfish
- EPSRC [EP/H051317/1, EP/L017563/1] Funding Source: UKRI
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Plasma enhanced chemical vapour deposition (PECVD) post-treatment with three different precursors is employed to improve corrosion resistance of plasma electrolytic oxidation (PEO) coated Mg. Surface morphology, chemical and phase composition are characterised by SEM, EDS, and XRD analyses, whereas corrosion resistance is assessed by electrochemical tests. PECVD post-treatments can significantly affect PEO coatings, resulting in sealed pores and multi-layered inner barrier structure. Depending on the precursor, this can have both positive and negative influence on the corrosion resistance of the PEO coatings. The PECVD post-treatment with hexamethyldisiloxane precursor significantly improves corrosion resistance of PEO coatings, providing the best corrosion protection of Mg.
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