Fractal research on AFM images of polycrystalline aluminum surface with adsorption film of SDS inhibitor |
| |
Authors: | Jun-E Qu Xing-Peng Guo Zhen-Yu Chen Gong-Wu Song Xiu-Hua Zhang |
| |
Affiliation: | 1.College of Chemistry and Chemical Engineering,Hubei University,Wuhan,China;2.Hubei Key Laboratory of Materials Chemistry and Service Failure,Wuhan,China |
| |
Abstract: | 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. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|