脉冲频率对7050高强铝合金微弧氧化膜层的影响

doi:10.7527/S1000-6893.2019.22967

Abstract

Abstract: The Micro-Arc Oxidation(MAO) ceramic coatings were prepared at the pulse frequencies of 50, 250, 500, 750, 1 000 Hz on the 7050 high strength aluminum alloy. To analyze the surface morphology, phase composition, corrosion resistance and wear resistance of ceramic coatings, the Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), electrochemical workstation, friction-abrasion tester were used. The results showed that when the pulse frequency was too low, the surface of MAO ceramic coating would be rough, which affected the compactness of the coating. When the pulse frequency was too high, it would be unfavorable to the growth of MAO ceramic coating, and the corrosion resistance and wear resistance of the as-prepared coatings were poor. When the pulse frequency was 250 Hz, the coating was of the best wear resistance and corrosion resistance.

Key words: 7050 high strength aluminum alloy, micro-arc oxidation, pulse frequency, ceramic coating, wear resistance, corrosion resistance

CLC Number:

V252.2

ZONG Yu, SONG Renguo, HUA Tianshun, CAI Siwei, WANG Chao, LI Hai. Effects of pulse frequency on MAO coatings of AA7050[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019, 40(11): 422967-422967.

References 22

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Effects of pulse frequency on MAO coatings of AA7050

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