Journal
CORROSION SCIENCE
Volume 209, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2022.110785
Keywords
Mg alloy; Plasma electrolytic oxidation; Zeolite; Corrosion resistance
Funding
- National Natural Science Foundation of China [M-0056]
- Mobility Programme of the Sino-German Center [I-20210305]
- Natural Science Foundation Project of Liaoning Province
- Petra III (DESY, Hamburg) for accepting the proposal
- [52071067]
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Incorporating zeolite microparticles containing Ce3+ ions into PEO coating enhances the corrosion resistance of AM50 Mg alloy and stabilizes and enhances the barrier properties of the oxide layer during corrosion.
Ce3+ ions containing zeolite microparticles were in-situ incorporated into plasma electrolytic oxidation (PEO) coating to provide self-healing property for AM50 Mg alloy. It was found that the Ce3+ ions can be released from the inertly incorporated zeolite microparticles via ion-exchange as well as from dissolved coating material which contains high concentration of reactively incorporated zeolites when corrosion occurs, leading to improved corrosion resistance of the oxide layer in 0.5 wt% NaCl solution. The newly formed cerium hydroxides/oxides when corrosion occurs can stabilize and enhance the barrier property of the passive film at metal/coating interface.
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