期刊
CORROSION SCIENCE
卷 192, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2021.109859
关键词
Hydroxyapatite coating; Mg alloy; PVA; EIS; Simulated body fluid; FE-SEM; XRD
The eco-friendly hydroxyapatite-based coating modified by polyvinylalcohol (PVA) was found to provide effective corrosion protection for Mg AZ31 substrates, with the best performance achieved in a one-step process with a PVA concentration of 0.05 wt% and an immersion time of 60 min. The results also showed that prolonged treatment time led to increased irregularity in morphology.
Eco-friendly hydroxyapatite-based coating modified by polyvinylalcohol (PVA) was used as a protective layer for Mg AZ31 substrates. Anti-corrosion performance of coatings was examined in both sodium chloride 3.5 wt% and simulated body fluid (SBF) solutions. The best performance against corrosion was achieved in the one-step process with a PVA concentration of 0.05 wt% and an immersion time of 60 min. The FE-SEM images also have shown that the irregularity of morphology was evident for the samples treated longer than 60 min. The results showed that the HA+PVA 0.05 wt% coated AZ31 Mg alloy causes less corrosion of Mg in the SBF solution.
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