【摘 要】
：
Ceramic coatings are fabricated on pure aluminium by plasma electrolytic oxidation (PBO) in three kinds of electrolyte systems [E1: 0.05M NaOH+0.033M Na2SiO3, E
【机 构】
：
Beijing NationalLaboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sc
论文部分内容阅读
Ceramic coatings are fabricated on pure aluminium by plasma electrolytic oxidation (PBO) in three kinds of electrolyte systems [E1: 0.05M NaOH+0.033M Na2SiO3, E2: 0.025M NaOH+0.008M (NaPO3)6 and E3: 0.025MNaOH+0. 066M Na2 SiO3+0. 008M (NaPO3)6]. The voltage-time responses show that the PEO process of E2 has the highest discharging voltage, which results in the biggest pores and heaviest cracks on the smfaces. X-ray diffraction results show that coatings produced in E1 and E3 are mainly composed of γ-Al2 O3 and mullite, while coatings produced in E2 are mainly composed of α-Al2O3. After PEO treatment the corrosion resistance of aluminium is improved significantly and the coatings produced in E3 perform the best corrosion resistance.
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