Abstract
A white light, i.e., Fabry-Perot, interferometry was utilized for the first time to determine the rate change of the electrical resistance of aluminum samples during the initial stage of anodization processes in aqueous solution. In fact, because the resistance values in this investigation were obtained by Fabry-Perot interferometry, an electromagnetic method rather than an electronic method, the abrupt rate change of the resistance was called electrical resistance–emission spectroscopy. The anodization process of the aluminum samples was carried out by the DC method in different sulphuric acid concentrations (0.0,2,4,6,8,10% H2SO4) at room temperature. In the meantime, the Fabry-Perot interferometry was used to determine the difference between the electrical resistance of two subsequent values, dR, as a function of the elapsed time of the DC experiment for the aluminum samples in 0.0,2,4,6,8,10% H2SO4 solutions. The Fabry-Perot interferometry was based on a fiber-optic sensor in order to make real time-white light interferometry possible at the aluminum surfaces in the sulphuric acid solutions. The electrical resistance-emission spectra represent a detailed picture of not only the rate change of the electrical resistance throughout the anodization processes but also the spectra represent the rate change of the growth of the oxide films on the aluminum samples in different solutions. As a result, a new spectrometer was developed based on the combination of the Fabry-Perot, i.e., white light, interferometry and DC method for studying in situ the electrochemical behavior of metals in aqueous solutions. In addition, the obtained values of the resistance of the combination of the Fabry-Perot interferometry and DC method were compared with resistance values of the aluminum samples in 0.0,2,4,6,8,10% H2SO4 solutions by the electrochemical impedance spectroscopy (EIS). Keywords: Fabry-Perot interferometry, White light interferometry, Electrical resistance, Anodization, Fiber-optics sensor, DC method & EIS. Figure 1
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call