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標題: Corrosion resistance of chromium nitride on low alloy steels by cathodic arc deposition
作者: Han, S.
Lin, J.H.
Wang, D.Y.
Lu, F.H.
Shih, H.C.
關鍵字: pvd coatings;thin-films;behavior;crn
Project: Journal of Vacuum Science & Technology a-Vacuum Surfaces and Films
期刊/報告no:: Journal of Vacuum Science & Technology a-Vacuum Surfaces and Films, Volume 19, Issue 4, Page(s) 1442-1446.
The electrochemical behavior of deposited chromium nitride (CrN) coatings on steel has been investigated in this study. The CrN coatings were prepared by using a reactive cathodic arc plasma deposition technology in an industrial scale. The microstructure and its crystallinity of the chromium nitride have been studied using x-ray diffraction and cross-sectional transmission electron microscopy. The CrN coatings exhibit a microcolumnar morphology. The aqueous corrosion behavior of the coatings was evaluated in a saline (3% NaCl solution) environment in terms of open-circuit potentials and polarization resistance (RP) resulting from electrochemical impedance spectroscopy. The results indicated that the CrN coatings are nobler than the uncoated steel and the R-p of the CrN coatings is at least one order of magnitude higher than that of uncoated steel. However, the R-p of the CrN coatings tend to decrease with immersion duration, showing that the corrosion changes from charge transfer to diffusion controlled, especially when the immersion time is long enough. (C) 2001 American Vacuum Society.
ISSN: 0734-2101
DOI: 10.1116/1.1361038
Appears in Collections:材料科學與工程學系

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