Corresponding Author

Jun_tao WANG


The orthogonal design was used to screen the film_forming technique on LY12 aluminum alloy using quadrivalent cerium salt, and the corrosion_resistance performance of the coating was studied. The results revealed that: after LY12 aluminum alloy was treated by cerium salt, its pitting potential shifts to positive direction while the corrosion potential slightly decreases, showing that the alloy becomes less sensitive to pitting corrosion was greatly improved, comparable to that after chromate treatment; in addition, by combining the results of electrochemical measurements with surface analysis, the mechanism of corrosion_resistance on the race_earth conversion coating of the aluminum alloy was also discussed.


Aluminum alloy, Cerium salt treatment, Conversion coating, Technique, Corrosion resistance

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[1] JamesT ,RenshawJr.Aluminumpretreatment:nextgenerationnonchrometechnologiesarereadyforthenewmillennium[J].MetalFinishing,1997,12:28~31.

[2] Keda,Meguro.Surfacetreatmentchemicalsandbathforaluminumoritsalloyandsurfacetreatmentmethod[P].E .U .Patent:No.0411606A2,1990_01_08.

[3] DanilidisI ,SykesJM ,HuntersJA ,etal.Manganesebasedconversiontreatment[J].SurfaceEngineer,1999,15(5):401~405.

[4] HintonBRW ,ArnottDR ,RyanNE .Ceriumconversioncoatingsforthecorrosionprotectionofaluminum[J].MetalForum,1986,9(3):162~173.

[5] MansfeldF ,WangY ,ShihH .TheCe_Moprocessforthedevelopmentofastainlessaluminum[J].Electro chemicalActa.1997,37(12):2277~2282.

[6] Mansfeldetal.Methodforcreatingacorrosion_resistantsurfaceonaluminumalloyshavingahighcoppercon tent[P].USPatent:No.5582654,1996_12_10.

[7] ValerieGuillaumin,GeorgesMankowski.Localizedcorrosionof2024T351aluminumalloyinchloridemedia[J].CorrosionScience,1999,41:421~438.



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