| Autor: |
Lilu, Qin, Jiamu, Huang, Longlong, Hao, Jun, Su, Niu, Ma, Lingyi, Yin |
| Rok vydání: |
2020 |
| Zdroj: |
Journal of nanoscience and nanotechnology. 20(8) |
| ISSN: |
1533-4899 |
| Popis: |
To improve corrosion performance of coatings on AZ31B magnesium alloy, the nano-CeO² additives were included in Na²SiO³ based electrolyte during process of pulse micro arc oxidation (MAO). The MAO-CeO² coating was successfully prepared to characterize its structure, micro morphology and composition. The XRD results indicated that MAO-CeO² coatings were consisted of Mg²SiO⁴, MgSiO³, MgF² and CeO². The intensity of CeO² peaks increases with increasing nano-CeO² particles in electrolyte. The number of cracks on MAO-CeO² coatings exhibited a V-shaped trend with increase in nano-CeO² content. Meanwhile, the influence of nano-CeO² on corrosion behavior of MAO-CeO² coatings is investigated by salt spray test and electrochemical measurement. The corrosion current density of coatings presented same trend and corrosion potential is further studied. The MAO-CeO² coatings formed in electrolyte with 10 g/L nano-CeO² showed best corrosion performance which has the lowest corrosion current density of 0.58 nA/cm² and the highest corrosion potential of - 1269 mVSCE. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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