Abstract: The electrochemical corrosion properties and effect of microstructures on them of a coarse grained and two nanocrystalline Fe-50Cu bulk alloys prepared by powders metallurgy (PM) as well as the liquid phase reduction (LPR) and mechanical alloying (MA) methods with hot pressing, respectively, were investigated in H2SO4 solutions by means of electrochemical methods through measuring open circuit potentials, potentiodynamic polarization, electrochemical impedance spectroscopies, and so on. The results show that the corrosion current densities of three Fe-50Cu alloys prepared by the different methods increase with the increment of H2SO4 solution concentrations. Their electrochemical impedance spectroscopies are composed of a single capacitive arc, indicating the corrosion processes are controlled by the electrochemical reactions. The changed trend of charge transfer resistances of three Fe-50Cu alloys is adverse to that of corrosion current densities. In the same H2SO4 solution concentrations, the corrosion current densities increase and therefore corrosion properties decrease when the grain sizes are decreased. The corrosion current densities of LPR Fe-50Cu alloy are larger, the activation energies and charge trnasfer resistances are lower and therefore its corrosion rates are faster than those of nanocrystalline MA Fe-50Cu alloy.
1 Gleiter H. Progress in Materials Science, 1989, 33(4), 223. 2 Lu K. Journal of Materials & Technology, 1999, 15(3), 193. 3 Koch C C. Journal of Materials Science, 2007, 42(5), 1403. 4 Hahn E N, Meyers M A. Materials Science and Engineering A, 2015, 646, 101. 5 Zeiger W, Schneider M, Scharnweber D. Nanostructured Materials, 1995, 6(5-8), 1013. 6 Li Y, Wang F H, Liu G. Corrosion, 2004, 60(10), 891. 7 Youssef K M S, Koch C C, Fedkiw P S. Corrosion Science, 2004, 46(1), 51. 8 Mishra R, Balasubramaniam R. Corrosion Science, 2004, 46(12), 3019. 9 Meng G Z, Li Y, Wang F H. Electrochimca Acta, 2006, 51(20), 4277. 10 Tavoosi M, Barahimi A. Surfaces and Interfaces, 2017, 8, 103. 11 Barbucci A, Farne G, Matteazzi P, et al. Corrosion Science, 1999, 41, 463. 12 Li X L, Li Y, Wang F H, et al. Journal of Chinese Society for Corrosion and Protection, 2002, 22(6), 326(in Chinese). 李雪莉, 李瑛, 王福会, 等. 中国腐蚀与防护学报, 2002, 22(6), 326. 13 Lyu H B, Li Y, Wang F H. Journal of Chinese Society for Corrosion and Protection, 2006, 26(3), 171(in Chinese). 吕海波, 李瑛, 王福会. 中国腐蚀与防护学报, 2006, 26(3), 171. 14 Mosavat S H, Shariat M H, Bahrololoom M E. Corrosion Science, 2012, 59, 81. 15 Wang S G, Sun M, Xu Y H, et al. Journal of Materials Science & Technology, 2018, 34(12), 2498. 16 Wang X Y, Li D J. Electrochimica Acta, 2002, 47(24), 3939. 17 Djordje M, Joachim G, Rainer S F. Acta Materialia, 2008, 56(18), 5214. 18 Neumann H, Plevachuk Y, Allenstein F. Materials Science and Enginee-ring A, 2003, 361(1/2), 155. 19 Jia Z Q. Studies on corrosion properties of binary two-phase bulk nanocrystalline Ag-25Ni alloy. Master’s Thesis, Shenyang Normal University, China, 2017(in Chinese). 贾中秋. 二元双相块体纳米晶Ag-25Ni合金腐蚀性能研究. 硕士学位论文, 沈阳师范大学, 2017. 20 Kim J C, Ko B H, Moon I H. Nanostructured Materials, 1996, 7(8), 887. 21 Kawamura M, Yamaguchi M, Abe Y, et al. Microelectronic Engineering, 2005, 82(3-4), 277. 22 Sun Z B, Guo J, Song X P, et al. Journal of Alloys and Compounds, 2008, 455(1-2), 243. 23 Nevesi I. In: Proceedings of 13th ICEC. Piscateway, USA, 1986, pp. 221. 24 Wang C L, Lin S Z, Niu Y, et al. Applied physics A-Materials Science & ProcessingA, 2003, 76(2), 157. 25 Nandi A, Gupta M D, Banthia A K. Colloids and Surfaces A-Physicochemical and Engineering Aspects, 2002, 197, 119. 26 Zhu H T, Zhang C Y, Yin Y S. Journal of Crystal Growth, 2004, 270, 722. 27 Cao Z Q, Zhu X M, Li F C. Rare Metal materials and Engineering, 2008,37(7), 1221(in Chinese). 曹中秋, 祝溪明, 李凤春. 稀有金属材料与工程, 2008, 37(7), 1221. 28 Cui T L. The electrochemical corrosion behavior of nanocrystalline bulk Fe-50Cu alloys. Master’s Thesis, Shenyang Normal University, China, 2018(in Chinese). 崔田路.纳米晶Fe-50Cu块体合金腐蚀电化学性能研究.硕士学位论文,沈阳师范大学,2018.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2020, Vol. 34 
