Effects of sealing process on corrosion resistance and roughness of anodic films of titanium alloy Ti-10V-2Fe-3Al

Abstract

Anodic oxide films of titanium alloy Ti-10V-2Fe-3Al were sealed in calcium acetate solution. The morphology and composition of the sealed films were investigated using scanning electron microscopy (SEM), atomic force microscope (AFM) and energy dispersive spectroscopy (EDS). The results show that the sealing process makes the anodic oxide films more uniform. Elemental calcium is presented through the whole depth of the anodic oxide films. The roughness of the anodic oxide films is reduced after the sealing process. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization were used to study the corrosion behavior of the anodic oxide films. It is revealed that the sealing process improves the corrosion resistance of the anodic oxide film of titanium alloy Ti-10V-2Fe-3Al.

Keywords

sealing / corrosion resistance / roughness / calcium acetate / titanium alloy

References

[1] PopaM. V., VasiescuE., DrobP., AnghelM., VasilescuC., RoscaI. M., LopezA. S.. Anodic passivity of some titanium base alloys in aggressive environments [J]. Material Corrosion, 2002, 53(1): 51-59

[2] LuX., LengY., ZhangX.-d., XuJ.-r., QinL., ChanC.-wai.. Comparative study of osteoconduction on micromachined and alkali-treated titanium alloy surfaces in vitro and in vivo [J]. Biomaterials, 2005, 26(14): 1793-1801

[3] MiloseyI., KosecT., StrehblowH. H.. XPS and EIS study of the passive film formed on orthopaedic Ti-6Al-7Nb alloy in Hank’s physiological solution [J]. Electrochimica Acta, 2008, 53(9): 3547-3558

[4] BeranekR., HildebrandH., SchmukiP.. Self-organized porous titanium oxide prepared in H₂SO₄/HF electrolytes [J]. Electrochemical and Solid-state Letters, 2003, 6(3L): 12-14

[5] BauerS., KleberS., SchmukiP.. TiO₂ nanotubes: Tailoring the geometry in H₃PO₄/HF electrolytes [J]. Electrochemistry Communications, 2006, 8(8): 1321-1325

[6] LiuJ.-h., YiJ.-l., LiS.-m., YuM., XuY.-zheng.. Fabrication and characterization of anodic oxide coatings on titanium alloy Ti-10V-2Fe-3Al [J]. Int J Miner Metal Mater, 2009, 16(1): 96-102

[7] GaponenkoN. V., HluzdY. V., MaliarevichG. K., MolchanI. S., ThompsonG. E., DabboussiS., ElhouichetH., PrislopskiS. Y., LutichA. A.. Room-temperature photoluminescence from porous anodic alumina films with embedded terbium and europium species [J]. Materials Letters, 2009, 63(6/7): 621-624

[8] ZhangJ.-s., ZhaoX.-h., ZuoY., XiongJ.-peng.. The bonding strength and corrosion resistance of aluminum alloy by anodizing treatment in a phosphoric acid modified boric acid/sulfuric acid bath [J]. Surface and Coatings Technology, 2008, 202(14): 3149-3156

[9] Garcia-vergaS. J., SkeldonP., ThompsonG. E., HabazakiH.. A flow model of porous anodic film growth on aluminium [J]. Electrochimica Acta, 2006, 52(2): 681-687

[10] ZuoY., ZhaoP.-h., ZhaoJ.-mao.. The influences of sealing methods on corrosion behavior of anodized aluminum alloys in NaCl solution [J]. Surface and Coatings Technology, 2003, 166(2/3): 273-242

[11] HaoL., ChengB. R.. Sealing process of anodic coatings-past, present, and future [J]. Metal Finish, 2000, 12(8): 8-18

[12] SnoganF., BlancC., MankowskiG., PebereN.. Characterisation of sealed anodic films on 7050 T74 and 2214 T6 aluminium alloys [J]. Surface and Coatings Technology, 2002, 154(1): 94-103

[13] TamilselviS., RamanV., RajendranN.. Corrosion behaviour of Ti-6Al-7Nb and Ti-6Al-4V ELI alloys in the simulated body fluid solution by electrochemical impedance spectroscopy [J]. Electrochemica Acta, 2006, 52(3): 839-846

[14] KangM. K., MoonS. K., LeeS. B., KimK. M., LeeY. K., KimK. N.. Antibacterial effects and cytocompatibility of titanium anodized in sodium chloride, calcium acetate, and β-glycerol phosphate disodium salt pentahydrate mixed solution [J]. Thin Solid Films, 2009, 517(17): 5390-5393

[15] YiJ.-l., LiuJ.-h., LiS.-m., YuM., WuG.-l., WuLiang.. Morphology evolution and growth mechanism of porous anodic oxide films on titanium alloy Ti-10V-2Fe-3Al in neutral tartrate solution [J]. Journal of Central South University of Technology, 2011, 18(1): 6-15

[16] AladjemA.. Review anodic oxidation of titanium and its alloys [J]. Journal of Materials Science, 1973, 8(5): 688-704

[17] HitzigJ., JuttnerK., LorenzW. J., PaatschW.. AC-impedance measurements on porous aluminium oxide films [J]. Corrosion Science, 1984, 24(11/12): 945-952

[18] JuttnerK.. Electrochemical impendance spectroscopy (EIS) of corrosion processes on inhomogeneous surfaces [J]. Electrochimica Acta, 1990, 35(10): 1501-1508

[19] SouzaM. E. P., BallesterM., FreireC. M. A.. EIS characterisation of Ti anodic oxide porous films formed using modulated potential [J]. Surface and Coatings Technology, 2007, 201(18): 7775-7780

[20] YaoZ.-p., JiangZ.-h., XinS.-g., SunX.-t., WuX.-hong.. Electrochemical impedance spectroscopy of ceramic coatings on Ti-6Al-4V by micro-plasma oxidation [J]. Electrochimica Acta, 2005, 50(16/17): 3273-3279

[21] YaoZ.-p., JiangZ.-h., WangF.-ping.. Study on corrosion resistance and roughness of micro-plasma oxidation ceramic coatings on Ti alloy by EIS technique [J]. Electrochimica Acta, 2007, 52(13): 4539-4546

[22] RamanV., NagarajanS., RajendranN.. Electrochemical impedance spectroscopic characterization of passive film formed over β Ti-29Nb-13Ta-4.6Zf alloy [J]. Electrochem Commun, 2006, 8(8): 1309-1314

[23] AssisS. L. D., WolynecS., CostaI.. Corrosion characterization of titanium alloys by electrochemical techniques [J]. Electrochim Acta, 2006, 51(8/9): 1815-1819