The growth process of plasma electrolytic oxidation (PEO) coating conducted for Ti6Al4V was studied by electrochemical impedance spectroscopy (EIS). The sample was treated to different voltage in sodium aluminate solution with DC power at current density of 2A/dm2 and 8A/dm2, and then it was transferred with the solution to the electrolytic cell to perform the EIS test. SEM, EDS and XRD were also adopted to characterize the porous structure, element and phase composition of the PEO coating, respectively. The results show that the PEO coating is composed of titanium, aluminum and oxygen. In the spark region, no crystalline phase is detected, and the growth process of PEO coating, especially the loose outer layer, is strongly affected by the treatment voltage, but nearly independent on the current density. In the micro-arc region, the coating consists of aluminum titanate phase, and the current density has strong effects on the growth process of the loose outer layer, but has little effects on the growth process of the dense inner layer.
ZHANG Xue-Lin
,
JIANG Zhao-Hua
,
YAO Zhong-Ping
,
WU Zhen-Dong
. Electrochemical Impedance Spectroscopy during the Process ofPlasma Electrolytic Oxidation[J]. Journal of Inorganic Materials, 2009
, 24(1)
: 111
-116
.
DOI: 10.3724/SP.J.1077.2009.00111
［1］Yerokhin A L, Nie X, Leyland A, et al. Surf. Coat. Technol.，1999，122(2-3)：73-93.
［2］王德云，东青，陈传忠，等. 硅酸盐学报，2005，33 (9)：1133-1138.
［3］Xin Shi-Gang, Song Li-Xin, Zhao Rong-Gen, et al. Surf. Coat. Technol.，2005，199(2-3)：184- 188.
［4］Yerokhin A L, Shatrov A, Samsonov V, et al. Surf . Coat . Technol.，2004，182(1)：78-84.
［5］孙学通，姜兆华，李延平，等（SUN Xue-Tong, et al）. 无机材料学报（Journal of Inorganic Materials），2004，19(4)：881-886.
［6］黄 平，徐可为，憨 勇. 硅酸盐学报，2002，30(3)：316-320.
［7］Xue W B, Wang C, Chen R Y, et al. Mater. Lett.，2002，52(6)：435-441.
［8］王亚明，蒋百灵，雷廷权，等（WANG Ya-Ming, et al）. 无机材料学报（Journal of Inorganic Materials），2003，18（6）：1325-1330.
［9］Mansfeld F, Kendig M W. Werkst. Korros.，1985，36(11)：473-483.
［10］Liu C, Bi Q, Leyland A, et al. Corrosion Science，2003，45(6)：1257-1273.
［11］Mansfeld F. Corrosion，1988，44(12)：856-868.
［12］Tsai C H, Mansfeld F. Corrosion Science，1993，49(9)：726-737.
［13］Scully J R, Hensley S T. Corrosion Science，1994，50(9)：705-716.
［14］Yao Zhongping, Jiang Zhaohua, Xin Shigang, et al. Electrochimica Acta，2005，50(16-17)：3273-3279.
［15］Yao Zhongping, Jiang Zhaohua, Wang Fuping. Electrochimica Acta，2007，52(13)：4539-4546.
［16］Duan Hongping, Du Keqin, Yan Chuanwei, et al. Electrochimica Acta，2007，52(11)：3785-3793.
［17］Duan Hongping, Yan Chuanwei, Wang Fuhui. Electrochimica Acta，2007，51(14)：2898-2908.
［18］Parfenov E V, Yerokhin A L, Matthews A. Thin Solid Films，2007，516(2)：428-432.
［19］辛世刚. 哈尔滨工业大学博士学位论文，2003.
［20］Ikonopisov S.Electrochimica Acta，1977，22(10)：1077-1082.
［21］汪剑波，吴汉华，金曾孙，等（WANG Jian-Bo, et al）. 无机材料学报（Journal of Inorganic Materials），2006，21（3）：731-735.
［22］Sergio Luiz de Assis, Stephan Wolynec, Isolda Costa. Electrochimica Acta，2006，51 (8-9)：1815-1819.
［23］曹楚南，张鉴清. 电化学阻抗谱导论，第一版. 北京：科学出版社，2002.
［24］史美伦. 交流阻抗谱原理与应用，第一版. 北京：国防工业出版社，2001.
［25］Mansfeld F, Kendig M W. J. Electrochem. Soc.，1988，135(4)：828-833.
［26］Chung S C, Cheng J R, Chiou S D. Corros. Sci.，2000，42(7)：1249-1268.
