Journal
LANGMUIR
Volume 32, Issue 5, Pages 1405-1409Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.5b03873
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Funding
- Conseil Regional de Lorraine [11CP-769]
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Controlling microdischarges in plasma electrolytic oxidation is of great importance in order to optimize coating quality: The present study highlights the relationship between the polarity at which breakdown-occurs and the electrolyte pH as compared with the isoelectric point (IEP). It is found that working at a pH higher than the IEP of the grown oxide prevents the buildup of detrimental cathodic discharges. The addition of phosphates results in a shift in the IEP to a lower value and therefore promotes anodic discharges at the expense of cathodic ones.
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