期刊
COATINGS
卷 13, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/coatings13081370
关键词
magnesium alloys; coating; microarc oxidation; Na3PO4; voltage; corrosion resistance
In this study, an Na3PO4 monosalt solution was used to investigate the effects of voltage and Na3PO4 concentration on the spark discharge phenomenon, thickness, roughness, and corrosion resistance of MAO coatings. The results showed that MAO coatings were effectively synthesized at high concentrations and voltages. Furthermore, the addition of KOH to the Na3PO4 monosalt solution resulted in discernible spark discharge and improved the corrosion resistance of the coatings.
Complex salt solution systems are commonly used as electrolytes for microarc oxidation (MAO). To investigate the MAO phenomenon in simple electrolytes and evaluate the efficacy of MAO coatings, an Na3PO4 monosalt solution was used as the MAO electrolyte. In this study, the effects of the voltage and Na3PO4 concentration on the spark discharge phenomenon, thickness, roughness, and corrosion resistance of the coatings were investigated. The results showed that MAO coatings were effectively synthesised at high concentrations and voltages. Furthermore, the addition of KOH to the Na3PO4 monosalt solution resulted in discernible spark discharge and improved the corrosion resistance of the coatings. Thus, an MAO coating can be efficiently prepared using Na3PO4 solution as the electrolyte. In addition, the addition of KOH to the Na3PO4 monosalt solution reduced the voltage required for coating formation and enhanced the corrosion resistance of the coating.
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