We propose a new method of fractal analysis of the phase images obtained by the atomic-force microscopy (AFM) to study the properties of molecular adsorption films of corrosion inhibitors on the coarse polycrystalline surface, which can hardly be distinguished by using AFM height images due to the roughness of the surface. The system of polycrystalline aluminum and SDS (Sodium Dodecyl Sulfate) inhibitor is chosen as the research object. The electrochemical measurements of aluminum electrodes precoated with SDS films are carried out in HCl solutions, and the results show that the inhibition efficiency increases with the concentration of SDS in the prefilming solution and then remains nearly constant as the CMC (critical micelle concentration) of SDS is exceeded. The fractal analysis of the AFM images of prefilmed aluminum surfaces obtained in SDS solutions is performed and demonstrates that, as the SDS concentration increases, no obvious changes are observed for the fractal dimensions of height images, whereas the phase images present regular changes in the values of fractal dimensions, thus displaying the consistent alteration rule as revealed by electrochemical tests. The results prove the feasibility of the fractal analysis of AFM phase images in characterizing the adsorption behavior of the corrosion inhibitor on polycrystalline coarse surfaces.
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F. A. Martin, G. Bataillon, and J. Cousty, “In-situ AFM detection of pit onset location on a 304L stainless steel,” Corr. Sci., 50, 84–92 (2008).
J. E. Qu, X. P. Guo, H. R. Wang, and J. Y. Huang, “Corrosion behavior of pure aluminum in FeCl3 solution,” Trans. Nonferrous Met. Soc. China, 16, No. 6, 1460–1466 (2006).
A. Davoodi, J. Pan, C. Leygraf, and S. Norgren, “Probing of local dissolution of Al-alloys in chloride solutions by AFM and SECM,” Appl. Surf. Sci., 252, No. 15, 5499–5503 (2006).
G. F. Cui, J. H. Wang, N. Li, and X. Q. Huang, “A single precursor pit for pitting corrosion on defect of tinplate alloy layer visualized by atomic force microscopy,” Mater. Chem. Phys., 97, No. 2–3, 488–493 (2006).
T. Kosec, I. Milošev, and B. Pihlar, “Benzotriazole as an inhibitor of brass corrosion in chloride solution,” Appl. Surface Sci., 253, 8863–8873 (2007).
J. Telegdi, M. M. Shaglouf, A. Shaban, F. H. Karman, et al., “Influence of cations on the corrosion inhibition efficiency of aminophosphonic acid,” Electrochim. Acta, 46, No. 24–25, 3791–3799 (2001).
O. Olivares-Xometl, N. V. Likhanova, M. A. Dominguez-Aguilar, J. M. Hallen, et al., “Surface analysis of inhibitor films formed by imidazolines and amides on mild steel in an acidic environment,” Appl. Surf. Sci., 252, No. 6, 2139–2152 (2006).
J. M. Kim, H. S. Jung, J. W. Park, H.Y. Lee, and T. Kawai, “AFM phase lag mapping for protein-DNA oligonucleotide complexes,” Analit. Chim. Acta, 525, 151–157 (2004).
G. Y. Wen, X. Li, Y. G. Liao, and L. An, “Surface phase separations of PMMA/SAN blends investigated by atomic force microscopy,” Polymer, 44, No. 14, 4035–4045 (2003).
B. B. Mandelbrot, “How long is the coastline of Britain? Statistical self-similarity and fractal dimension,” Science, 155, 636– 638 (1967).
Z. Jiang, Wang Li., and B. Fei, “Research into the application of fractal geometry in characterizing machined surfaces,” Int. J. Mach. Tools Manufact., 41, 2179–2185 (2001).
L. Yan and H. Ivasaki, “Fractal aggregation of DNA after thermal denaturation,” Chaos, Solitons Fractals, 20, 877–881 (2004).
P. Falaras and A. Xagas, “Roughness and fractality of nanostructured TiO2 films prepared via sol–gel technique,” J. Mater. Sci., 37, No. 17, 3855–3860 (2002).
P. Zhang and W. H. Tan, “Atomic force microscopy for the characterization of immobilized enzyme molecules on biosensor surfaces,” Fresenius’ J. Analyt. Chem., 369, No. 3–4, 302–307 (2001).
A. P. Pentland, “Fractal-based description of natural scenes,” IEEE Trans PAMI, 6, No. 6, 661–674 (1984).
C. Q. Yuan, J. Li, X. P. Yan, and Z. Peng, “The use of the fractal description to characterize engineering surfaces and wear particles,” Wear, 255, 315–326 (2003).
C J. Huang and Y. Z. Zhang, “Adsorption of sodium dodecyl sulfonate on aluminum surface and its corrosion inhibition in hydrochloric acid solution,” Chin. J. Huaibei Ind. Teach. College (Natural Sciences Edition), 15, No. 2, 42–46 (1994).
F. B. Li, G. E. Thompson, and R. C. Newman, “Force modulation atomic force microscopy: background, development, and application to electrodeposited cerium oxide films,” Appl. Surf. Sci., 126, No. 1–2, 21–33 (1998).
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Published in Fizyko-Khimichna Mekhanika Materialiv, Vol. 45, No. 1, pp. 102–110, January–February, 2009.
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Qu, JE., Guo, XP., Chen, ZY. et al. Fractal research on AFM images of polycrystalline aluminum surface with adsorption film of SDS inhibitor. Mater Sci 45, 114–124 (2009). https://doi.org/10.1007/s11003-009-9164-9
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DOI: https://doi.org/10.1007/s11003-009-9164-9