Fig. 1. Microstructures of Al alloys; (a) AA5052-O, (b) AA5083-H321, (c) AA6061-T6.
Fig. 2. EIS Nyquist plots of (a) AA5052-O with immersion time in seawater, and (b) three tested Al alloys after 7 hrs immersion in seawater.
Fig. 3. Mott-Schottky plots of passive films formed on three tested Al alloys in 0.5M H2SO4 solution.
Fig. 5. Surface morphologies of three Al alloys after the polarization test in seawater.
Fig. 6. 3D analysis of three Al alloys after the polarization test in seawater.
Fig. 4. (a) Potentiostatic polarization curves of three tested Al alloys in seawater, and (b) surface view observation after the polarization test.
Table 1. Chemical compositions of aluminum alloys (wt%)
Table 2. Chemical compositions and properties of natural seawater
Table 3. Donor density of passive film formed on three tested aluminum alloys
참고문헌
- R. Kaibyshev, F. Musin, D. R. Lesuer, T. G. Nieh, Superplastic behavior of an Al-Mg alloy at elevated temperatures, Mater. Sci. Eng. A 342 (2003) 169-177. https://doi.org/10.1016/S0921-5093(02)00276-9
- K. A. Yasakau, M. L. Zheludkevich, S. V. Lamaka, M. G. Ferreira, Role of intermetallic phases in localized corrosion of AA5083, Electrochim. Acta 52 (2007) 7651-7659. https://doi.org/10.1016/j.electacta.2006.12.072
- A. Aballe, M. Bethencourt, F. J. Botana, M. J. Cano, M. Marcos, Localized alkaline corrosion of alloy AA5083 in neutral 3.5% NaCl solution, Corros. Sci. 43 (2001) 1657-1674. https://doi.org/10.1016/S0010-938X(00)00166-9
- U. Donatus, G. E. Thompson, J. A. Omotoyinbo, K. K. Alaneme, S. Aribo, O. G. Agbabiaka, Corrosion pathways in aluminium alloys, Trans. Nonferrous Met. Soc. China 27 (2017) 55-62. https://doi.org/10.1016/S1003-6326(17)60006-2
- C. Vargel, Corrosion of aluminium, Elsevier (2004) 113-137.
- J. B. Bessone, D. R. Salinas, C. E. Mayer, M. Ebert, W. J. Lorenz, An EIS study of aluminium barrier-type oxide films formed in different media, Electrochim. Acta 37 (1992) 2283-2290. https://doi.org/10.1016/0013-4686(92)85124-4
- A. G. Munoz, J. B. Bessone, Pitting of aluminium in non-aqueous chloride media, Corros. Sci. 41 (1999) 1447-1463. https://doi.org/10.1016/S0010-938X(98)00199-1
- M. Bethencourt, F. J. Botana, J. J. Calvino, M. Marcos Barcena, J. Perez, M. A. Rodriguez, The influence of the surface distribution of Al6 (MnFe) intermetallic on the electrochemical response of AA5083 aluminium alloy in NaCl solutions, In Materials Science Forum, Trans Tech Publications, 289 (1998) 567-574.
- B. Zaid, D. Saidi, A. Benzaid, S. Hadji, Effects of pH and chloride concentration on pitting corrosion of AA6061 aluminum alloy, Corros. Sci. 50 (2008) 1841-1847. https://doi.org/10.1016/j.corsci.2008.03.006
- P. Arellanes-Lozada, O. Olivares-Xometl, D. Guzman-Lucero, N. V. Likhanova, M. A. Dominguez-Aguilar, I. V. Lijanova, E. Arce-Estrada, The inhibition of aluminum corrosion in sulfuric acid by poly(1-vinyl-3-alkyl-imidazolium hexafluorophosphate), Materials 7 (2014) 5711-5734. https://doi.org/10.3390/ma7085711
-
A. Fattah-alhosseini, Passivity of AISI 321 stainless steel in 0.5M
$H_2SO_4$ solution studied by Mott-Schottky analysis in conjunction with the point defect model, Arab. J. Chem. 9 (2016) S1342-S1348. https://doi.org/10.1016/j.arabjc.2012.02.015 - K. D. Ralston, N. Birbilis, C. H. J. Davies, Revealing the relationship between grain size and corrosion rate of metals, Scr. Mater. 63 (2010) 1201-1204. https://doi.org/10.1016/j.scriptamat.2010.08.035
- K. D. Ralston, N. Birbilis, Effect of grain size on corrosion: a review, Corros. 66 (2010) 075005-075005. https://doi.org/10.5006/1.3462912
- M. K. Chung, Y. S. Choi, J. G. Kim, Y. M. Kim, J. C. Lee, Effect of the number of ECAP pass time on the electrochemical properties of 1050 Al alloys, Mater. Sci. Eng. A 366 (2004) 282-291. https://doi.org/10.1016/j.msea.2003.08.056
- T. S. Mahmoud, Effect of friction stir processing on electrical conductivity and corrosion resistance of AA6063-T6 Al alloy, Proc. IMechaE. C: J. Mechanical Engineering Science, 222 (2008) 1117-1123. https://doi.org/10.1243/09544062JMES847
- W. R. Osorio, C. M. Freire, A. Garcia, The role of macrostructural morphology and grain size on the corrosion resistance of Zn and Al castings, Mater. Sci. Eng. A 402 (2005) 22-32. https://doi.org/10.1016/j.msea.2005.02.094
- S. J. Kim, S. J. Lee, J. Y. Jeong, K. H. Kim, Electrochemical characteristics of Al-Mg and Al-Mg-Si alloy in sea water, Trans. Nonferrous Met. Soc. China 22 (2012) s881-s886. https://doi.org/10.1016/S1003-6326(12)61820-2
- S. J. Kim, S. K. Jang, M. S. Han, J. C. Park, J. Y. Jeong, S. O. Chong, Mechanical and electrochemical characteristics in sea water of 5052-O aluminum alloy for ship, Trans. Nonferrous Met. Soc. China 23 (2013) 636-641. https://doi.org/10.1016/S1003-6326(13)62510-8
- J. D. Kim, S. I. Pyun, Effects of electrolyte composition and applied potential on the repassivation kinetics of pure aluminium, Electrochem. Acta 40 (1995) 1863-1869. https://doi.org/10.1016/0013-4686(95)94180-3
- J. K. Chon, Y. K. Kim, Investigation of the growth kinetics of Al oxide film in sulfuric acid solution, J. Kor, Chem. Soc. 54 (2010) 380-386. https://doi.org/10.5012/jkcs.2010.54.4.380
- O. I. Sekunowo, S. I. Durowaye, E. C. Anozie, Corrosion propensity of cold deformed 5052 aluminium alloy in seawater, Br. J. Appl. Sci. Tech. 8 (2015) 46-52. https://doi.org/10.9734/BJAST/2015/16681
- R. Rosliza, Improvement of corrosion resistance of aluminium alloy by natural products, Corrosion Resistance, InTech (2012) 377-396.
- E. M. Sherif, Corrosion and corrosion inhibition of aluminum in arabian gulf seawater and sodium chloride solutions by 3-Amino-5-Mercapto-1,2,4-triazole, Int. J. Electrochem. Sci. 6 (2011) 1479-1492.
- B. T. Lu, Y. Zeng, X. Pang, J. L. Luo, Effects of hydrogen and tensile stress on passivity of carbon steel, Corros. Eng. Sci. Techn. 50 (2015) 186-190. https://doi.org/10.1179/1743278215Y.0000000020
- W. L. Xu, T. M. Yue, H. C. Man, Stress corrosion cracking behaviour of excimer laser treated aluminium alloy 6013, Mater. Trans. 49 (2008) 1836-1843. https://doi.org/10.2320/matertrans.MRA2008105
- E. Sikora, D. D. Macdonald, Defining the passive state, Solid State Ion. 94 (1997) 141-150. https://doi.org/10.1016/S0167-2738(96)00505-X
- M. J. Carmezim, A. M. Simoes, M. F. Montemor, M. D. C. Belo, Capacitance behavior of passive films on ferritic and austenitic stainless steel, Corros. Sci. 47 (2005) 581-591. https://doi.org/10.1016/j.corsci.2004.07.002
- J. R. Davis, Alloying : understanding the basics, second Ed, ASM International, USA (2001) 351-416.
- A. Afseth, J. H. Nordlien, G. M. Scamans, K. Nisancioglu, Filiform corrosion of binary aluminium model alloys, Corros. Sci. 44 (2002) 2529-2542. https://doi.org/10.1016/S0010-938X(02)00029-X
- U. Donatus, G. E. Thompson, D. Elabar, T. Hashimoto, S. Morsch, Features in aluminium alloy grains and their effects on anodizing and corrosion, Surf. Coat. Tech. 277 (2015) 91-98. https://doi.org/10.1016/j.surfcoat.2015.07.034