铝表面Ce-硅烷-ZrO_2复合膜的制备及表征(英文)
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摘要
为了改善传统稀土转化膜的性能,运用浸泡法在铝表面制备Ce-硅烷-ZrO2复合膜。运用SEM、AFM、XPS和EIS等技术手段对复合膜层的微观形貌、化学组成和电化学性能进行研究,并与Ce转化膜进行比较。Ce-硅烷-ZrO2复合膜层表面呈堆砌结构,膜内层主要由Ce(III)的氧化物和氢氧化物构成,而膜外层的主要成分是硅烷偶联聚合而成的大分子网状结构。与Ce转化膜相比,加入硅烷和ZrO2纳米微粒后,复合膜表面的微孔和裂纹都明显减少,且耐蚀性能有了明显的改善。
In order to improve the property of traditional Ce-based conversion coatings, Ce-silane-ZrO2 composite coatings were successfully prepared on 1060 aluminum. The microstructure, chemical element composition and corrosion resistance of Ce-based conversion coatings and Ce-silane-ZrO2 composite coatings were investigated by SEM, AFM, XPS and EIS analyses. Stacking structure of the composite coating can be observed. The inner layer of the composite coatings mainly consists of oxide and hydroxide of Ce(III), and the silane network is composed of the outer layer together with a small amount of Ce(IV) hydroxide. By adding silane and ZrO2 nanoparticles into Ce-based conversion coatings, the porosity and the micro cracks of the coatings decrease apparently accompanying with the improvement of the corrosion resistance.
In order to improve the property of traditional Ce-based conversion coatings, Ce-silane-ZrO2 composite coatings were successfully prepared on 1060 aluminum. The microstructure, chemical element composition and corrosion resistance of Ce-based conversion coatings and Ce-silane-ZrO2 composite coatings were investigated by SEM, AFM, XPS and EIS analyses. Stacking structure of the composite coating can be observed. The inner layer of the composite coatings mainly consists of oxide and hydroxide of Ce(III), and the silane network is composed of the outer layer together with a small amount of Ce(IV) hydroxide. By adding silane and ZrO2 nanoparticles into Ce-based conversion coatings, the porosity and the micro cracks of the coatings decrease apparently accompanying with the improvement of the corrosion resistance.
引文
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[15]ARURAULT L.Electrochemical preparation of adherent ceria coatings on ferritic stainless steel[J].Thin Solid Films,2004,466(1-2):75-80.
[16]HUGHES A E,GORMAN J D,PATERSON P J K.The characterisation of Ce-Mo-based conversion coatings on Al-alloys[J].Corrosion Science,1996,38(11):1957-1976.
[17]YU X,LI G.XPS study of cerium conversion coating on the anodized 2024 aluminum alloy[J].Journal of Alloys and Compounds,2004,364(1-2):193-198.
[2]HINTON B R W.Corrosion inhibition with rare-earth-metal salts[J].Journal of Alloys and Compounds,1992,180:15-25.
[3]HINTON B R W,ARNOTT D R,RYAN N E.Cerium conversion coatings for the corrosion protection of aluminium[J].Materials Forum,1986,9(3):162-173.
[4]BETHENCOURT M.Lanthanide compounds as environmentallyfriendly corrosion inhibitors of aluminium alloys:A review[J].Corrosion Science,1998,40(11):1803-1819.
[5]HAYES S A.The phase stability of cerium species in aqueous systems—I.E-pH diagram for the Ce-HClO4-H2O system[J].Journal of the Electrochemical Society C,2002,149(12):623-630.
[6]ZHITOMIRSKY I,PETRIC A.Electrochemical deposition of ceria and doped ceria films[J].Ceramics International,2001,27(2):149-155.
[7]ZHITOMIRSKY I,PETRIC A.Electrolytic and electrophoretic deposition of CeO2 films[J].Materials Letters,1999,40(6):263-268.
[8]CUI Xue-jun,LIU Chun-hai,YANG Rui-song,LI Ming-tian,LIN Xiu-zhou,GONG Min.Phosphate film free of chromate,fluoride and nitrite on AZ31 magnesium alloy and its corrosion resistance[J].Transactions of Nonferrous Metals Society of China,2012,22(11):2713-2718.
[9]WANG M.Characterization of bis-triethoxysilylpropyl tetrasulfide layers on aluminum based on water-based silanization solution[J].Thin Solid Films,2012,520(17):5610-5615.
[10]ZAND R Z,VERBEKEN K,ADRIAENS A.Corrosion resistance performance of cerium doped silica sol-gel coatings on 304L stainless steel[J].Progress in Organic Coatings,2012,75(4):463-473.
[11]VANOOIJ W.Corrosion protection properties of organofunctional silanes—An overview[J].Tsinghua Science&Technology,2005,10(6):639-664.
[12]MONTEMOR M E,FEFFEIRA M G S.Cerium salt activated nanoparticles as fillers for silane films:Evaluation of the corrosion inhibition performance on galvanised steel substrates[J].Electrochimica Acta,2007,52(24):6976-6987.
[13]ZHELUDKEVICH M L.Nanostructured sol-gel coatings doped with cerium nitrate as pre-treatments for AA2024-T3-Corrosion protection performance[J].Electrochimica Acta,2005,51(2):208-217.
[14]HAMLAOUI Y.Cathodic electrodeposition of cerium-based oxides on carbon steel from concentrated cerium nitrate solutions part I.Electrochemical and analytical characterisation[J].Materials Chemistry and Physics,2009.113(2-3):650-657.
[15]ARURAULT L.Electrochemical preparation of adherent ceria coatings on ferritic stainless steel[J].Thin Solid Films,2004,466(1-2):75-80.
[16]HUGHES A E,GORMAN J D,PATERSON P J K.The characterisation of Ce-Mo-based conversion coatings on Al-alloys[J].Corrosion Science,1996,38(11):1957-1976.
[17]YU X,LI G.XPS study of cerium conversion coating on the anodized 2024 aluminum alloy[J].Journal of Alloys and Compounds,2004,364(1-2):193-198.