通过阳极极化曲线、Mott—Schottky分析等手段研究铸态纯镁和微晶化纯镁的腐蚀行为．结果表明，微晶化对纯镁的腐蚀行为有着明显地影响．与铸态纯镁相比，微晶化改变了纯镁钝化膜的成长机制，降低钝化膜内的载流子密度和扩散系数，显著地提高钝化膜的耐蚀能力．
For better understanding the effect of microcrystallization on corrosion performance of pure magnesium, the corrosion behavior of pure microcrystalline （MC） magnesium had been studied by means of anodic polarization curves and Mott-Schottky measurement in comparison with its counterpart cast magnesium. The experimental results indicated that microcrystallization had an obvious effect on the corrosion behavior of pure magnesium. In comparison with the cast magnesium, the passive film on the MC magnesium showed different growth mechanism and superior corrosion resistance to pitting corrosion, which might be resulted from lower point defect density and point defect diffusivity of the passive film.
参考文献
| [1] | Vinogradov A, Mimaki T, Hashimoto S. On the corrosion behaviour of ultra-fine grain copper[J]. Scr. Mater., 1999, 41(3): 319. |
| [2] | Youssef K, Koch C, Fedkiw P. Improved corrosion be- haviour of nanocrystalline zinc produced by pulse-current electrodeposition[J]. Corros. Sci., 2004, 46(1): 51. |
| [3] | Balyanov A, Kutnyakova J, Amirkhanova N A. Corrosion resistance of ultra fine-grained Ti[J]. Scr. Mater., 2004, 51(3): 225. |
| [4] | Kim S, Aust K, Erb E, et al. A comparison of the corrosion behaviour of polycrystalline and nanocrystalline cobalt [J]. Scr. Mater., 2003, 48(9): 1379. |
| [5] | Ye W, Li Y, Wang F H. Effects of nanocrystallization on the corrosion behavior of 309 stainless steel[J].Electrochim. Acta, 2006, 51(21): 4426. |
| [6] | Liu L, Li Y, Wang F H. Influence of nanocrystallization on passive behavior of Ni-based superalloy in acidic solu- tions[J].Electrochim. Acta, 2007, 52(7): 2392. |
| [7] | Meng G, Li Y, Wang F H. The corrosion behavior of Fe- 10Cr nanocrystalline coating[J]. Electrochim. Acta, 2006, 51(20): 4277. |
| [8] | Grosjean M, Zidoune M, Rou@ L, et al. Effect of ball milling on the corrosion resistance of magnesium in aque- ous media[J], Electrochimica Acta, 2004, 49(15): 2461. |
| [9] | Zidoune M, Grosjean M H, Rouo L, et al. Comparative study on the corrosion behavior of milled and unmilled magnesium by EIS[J], Corros.Sci., 2004, 46(12): 3041. |
| [10] | Li Y, Zhang T, Wang F H. Effect of microcrystallization on corrosion resistance of AZ91D[J].Electrochim. Acta, 2006, 51(14): 2845. |
| [11] | Goodlet G, Faty S, Cardoso S, et al. The electronic proper- ties of sputtered chromium and iron oxide films[J]. Corros. Sci., 2004, 46(6): 1479. |
| [12] | Carmezim N, Simees A, Montemor M, et al. Capacitance behaviour of passive films on ferritic and austenitic stain- less steel[J]. Corros. Sci., 2005, 47(3): 581. |
| [13] | Belo M, Hakiki N, Ferreira M. Semiconducting proper- ties of passive films formed on nickel-base alloys type Al- loy 600: influence of the alloying elements[J].Electrochim. Acta, 1999, 44(14): 2473. |
| [14] | Ferreira M, Hakiki N, Goodlet G, et al. Influence of the temperature of film formation on the electronic structure of oxide films formed on 304 stainless steel[J]. Electrochim. Acta, 2001, 46(24): 3767. |
| [15] | Jafarian M, Gobal F, Danaee I, et al. Electrochemical studies of the pitting corrosion of tin in citric acid solu- tion containing Cl-[J]. Electrochim. Acta, 2008, 53(17): 4528. |
| [16] | Sikora E, Sikora J, MacDonald D. A new method for es- timating the diffusivities of vacancies in passive films[J]. Electrochim. Acta, 1996, 41(5): 783. |
| [17] | Guo H, Lu B, Luo J. Study on passivation and erosion- enhanced corrosion resistance by Mott-Schottky analy- sis[J].Electrochim. Acta, 2006, 52(3): 1108. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%