Active corrosion protection by a smart coating based on a MgAl-layered double hydroxide on a cerium-modified plasma electrolytic oxidation coating on Mg alloy AZ31
Active corrosion protection by a smart coating based on a MgAl-layered double hydroxide on a cerium-modified plasma electrolytic oxidation coating on Mg alloy AZ31
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镁合金 AZ31 上的铈改性等离子体电解氧化涂层上基于 MgAl 层状双氢氧化物的智能涂层的主动腐蚀保护
DOI:
10.1016/j.corsci.2018.05.010
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发表时间:
2018-07
影响因子:
8.3
通讯作者:
Fusheng Pan
中科院分区:
文献类型:
--
作者:
Zhang Gen;Wu Liang;Tang Aitao;Ma Yanlong;Guangling Song;Zheng Dajiang;Jiang Bin;Atrens Andrej;Fusheng Pan
A composite coating was produced via (i) plasma electrolytic oxidation (PEO) with Ce salt sealing, on which layered double hydroxides (LDHs) were depositedviaa hydrothermal treatment, and (ii) then modified by phytic acid (PA)viaan ion-exchange reaction. The final coating (characterized using XRD, XPS, FT-IR, SEM, EDS and GDOES) consisted of LDHs/Mg(OH)2/CeO2/Ce(OH)3with a non-uniform Ce distribution. The corrosion protection and self-healing ability were investigated using polarization curves, EIS, immersion tests and SVET. The composite coating modified with PA showed the most superior corrosion protection and self-healing ability, attributed to the synergistic effect between Ce species and phosphate.
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