A thin sealing layer was coated on the micro-arc oxidation film of aluminiumalloy fiber by photo-chemical sol-gel method assisted underultraviolet light. The sealing layercould seal the porous micro-arc oxidation film completely，with a significant increase of thecorrosion resistance of aluminium fiber. The corrosion resistance of the micro-arc oxidation film and sealed layer were analysed by electrochemical workstation，the result showed that the corrosion potential of aluminum alloy fiber was positively shifted form -0. 651 V to -0. 368 V. The corrosion current Icorr was decreased form 6.02×10-6 A/cm2 to 9.58×10-10 A/cm2. The polarization impedance Rp was increased from 5.4×103 Ω·cm2 to 4.5×104 Ω·cm2，and the ultraviolet light treated micro-arc oxidation sealing layer provided low corrosion rate，which ensured the beter corrosion resistance property of aluminum fiber.
QIU Zhu
,
YANG Guo-Liang
,
WANG Zhen-Fang
,
CHEN Yi-Ping
,
JIN Xiao-Feng
. The Sealing Treatment with Sol-Gel Coatings Method for Micro-Arc Oxidation Layerand Its Corrosion Resistance[J]. Paint & Coatings Industry, 2019
, 49(11)
: 7
-11
.
DOI: 10.12020/j.issn.0253-4312.2019.11.7
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