|
|
|
| EFFECT OF PRE-STRAIN STATES ON ELECTRONIC PROPERTY OF PASSIVE FILM ON J55 PIPELINE STEEL IN CHANGQING OILFIELD LUO-HE STRATUM WATER |
| MU Lijun, ZHAO Wenzhen |
| School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049 |
|
|
|
|
Abstract The electronic property and photocurrent characteristics of passive films formed on J55 pipeline steel with tension，compression and bending stress conditions in the Changqing oilfield Luo-he stratum water were investigated through electrochemical impedance spectroscopy (EIS) and photocurrent techniques. The results showed that the transfer resistance R1, the film resistance R2 and diffusion resistance decreased with the increase of the tension stress, and increased with the increase of the compression and the bending stress. It was shown that the protective effect of passive film on J55 pipeline steel was increased with the decreasing of the tension stress and the increasing of the compression and the bending stress. Mott-Schottky plots revealed that the slope of M-S plot decreased with the increasing of the tension stress and the decreasing of the compression and the bending stress, it can be concluded that the donor density of the passive film increased with increasing the tension stress and decreasing the compression and the bending stress. The photocurrent measurement indicated that the photocurrent decreased with the increasing of the tension stress and the decreasing of the compression and the bending stress.
|
|
Received: 29 June 2010
|
|
|
|
Corresponding Authors:
MU Lijun
E-mail: mulijunxjtu@126.com
|
| [1] Carmezim M J, Simoes A M, Montemor M F, et al. Capacitance behavior of passive films on ferric and austenitic stainless steel [J]. Corros. Sci., 2005, 47(3): 581-585[2] Cunha Belo M Da, Hakiki N E, Ferreira M G S, et al. Chemical composition and electronicstructure of the oxide films formed on 316L stainless steel and nickel based alloys in high temperature aqueousenvironments [J]. Corros. Sci., 2000, 42: 1635-1650[3] Yang M Z, Luo J L, Patchet B M. Correlation of hydrogen-facilitated pitting of AISI 304 stainless steel to semiconductivity of passive films [J].Thin Solid Films, 1999, 354: 142-147[4] Rata A D, Chezan A R, Presura C, et al. Electrical properties of epitaxially grown VOx thin films [J]. Surf. Sci., 2003, 341: 532-535[5] Cho E A, Ahn S J, Kwon H S. Effects of EDTA on the electronic properties of passive film on Fe-20Cr in pH 8.5 buffer solution [J]. Electrochim. Acta, 2005, 50, 3383-3389[6] Hamadou L, Kadri A, Benbrahim N. Characterisation of passive films formed on low carbon steel in borate buffer solution(pH 9.2) by electrochemical impedance spectroscopy [J]. Surf. Sci., 2005, 252: 1510[7] Alves V A, Brett C M A. Characterisation of passive filmes formed on mild steels in bicarbonate solution by EIS [J].Electrochim. Acta. 2002, 47: 2081[8] Bard A J, Faulker L R. Electrochemical Methods [M]. Beijing:Chemical Industry Press, 1956: 377 (Bard A J, Faulker L R. 电化学方法－原理及应用 [M].北京：化学工业出版社，1986：377)[9] Sikora J, Sikora E, MacDonald D D. The electronic structure of the passive film on tungsten [J].Electrochim. Acta, 2000, 45(12): 1875[10] Ge H H, Zhou G D, Wu W Q. Passivation model of 316 stainless steel in simulated cooling water and the effect of sulfide on the passive film [J]. Surf. Sci., 2003, 211：321-334[11] Cheng Y F, Luo J L. Electronic structure and pitting susceptibility of passive film on carbon steel [J]. Electrochim. Acta, 1999, 44: 2947 |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
